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Four-bar linkage reconfigurable robotic wheel: Design, kinematic analysis, and experimental validation for adaptive size modification
- X. Yamile Sandoval-Castro, Sergio Muñoz-Gonzalez, Mario A. Garcia-Murillo, Pedro D. Ferrusca-Monroy, Maxiamiano F. Ruiz-Torres
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- Robotica , First View
- Published online by Cambridge University Press:
- 13 May 2024, pp. 1-15
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This article presents the development of a robot capable of modifying its size through a wheel reconfiguration strategy. The reconfigurable wheel design is based on a four-bar retractable mechanism that achieves variation of the effective radius of the wheel. A reconfiguration index is introduced based on the number of retractable mechanisms that predicts the radius of configuration according to the number of mechanisms implemented in the wheel. The kinematics of the retractable mechanism is studied to determine the theoretical reconfiguration radius during the transformation process, it is also evaluated numerically with the help of the GeoGebra software, and it is validated experimentally by image analysis using the Tracker software. The transformation process of the robot is investigated through an analysis of forces that consider the wheel in contact with the obstacle, the calculation of the wheel torque and the height of the obstacle to be overcome are presented. On the other hand, the experimental validation of the robot reconfiguration process is presented through the percentage of success shown by the robot to overcome obstacles of 50, 75, 100 and 125 mm. In addition, measurements of energy consumption during the transformation process are reported. Reconfigurable wheels, capable of adapting their size, offer innovative solutions to various challenges across different applications such as robotic exploration and search and rescue missions to industrial settings. Some key issues that these wheels can address include terrain adaptability enhancing a robot’s mobility over uneven surfaces, or obstacles; enhanced robotic design; cost-effective design; space efficiency; and versatility in applications.
Epidemiology of Ancylostoma spp. in the endangered Iberian lynx (Lynx pardinus) in the Doñana National Park, south-west Spain
- J. Vicente, F. Palomares, A. Ruiz de Ibañez, J. Ortiz
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- Journal of Helminthology / Volume 78 / Issue 2 / June 2004
- Published online by Cambridge University Press:
- 12 April 2024, pp. 179-183
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The epidemiology of Ancylostoma spp. was studied in the endangered Iberian lynx (Lynx pardinus) in the Doñana National Park, south-west Spain. Faecal samples were collected throughout a complete annual cycle (August 1997 to September 1998). The overall egg prevalence of Ancylostoma spp. was 57.8%. The pattern of abundance of Ancylostoma spp. eggs in faeces was overdispersed. Juvenile lynx demonstrated a statistically higher prevalence and abundance of Ancylostoma spp. than in adults. These levels of egg output (maximum 21195 epg), as previously reported in free ranging large felid cubs, could be close to disease involvement. The potential pathogenicity of hookworms and the influence of individual and ecological factors on hookworm transmission in the Iberian lynx from the Doñana National Park population are discussed.
High-Temperature X-Ray Diffraction, Differential Thermal Analysis and Thermogravimetry of the Kaolinite-Dimethylsulfoxide Intercalation Complex
- F. Franco, M. D. Ruiz Cruz
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- Clays and Clay Minerals / Volume 50 / Issue 1 / February 2002
- Published online by Cambridge University Press:
- 01 January 2024, pp. 47-55
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The intercalation complex of a kaolinite from Cornwall, UK, with dimethylsulfoxide (DMSO) was studied by high-temperature X-ray diffraction (HTXRD), differential thermal analysis (DTA) and thermogravimetry (TG). The X-ray pattern obtained at room temperature indicated that intercalation of DMSO into kaolinite caused an increase of the basal spacing of kaolinite from 7.14 to 11.19 Å. Heating between 25 and 300°C caused the removal of the DMSO, which occurred over several stages. In a first stage (25–125°C), an expansion (from 11.19 to 11.28 Å) followed by a contraction (from 11.28 to 11.19 Å) is observed, at the same time as the intensity of the basal reflection decreased and was replaced by a broad band extending from ~11 to ~7 Å. In a second stage (125–200°C), the loss of DMSO did not lead to changes in the HTXRD patterns; and finally, in a third stage, the loss of DMSO caused an important increase in intensity and sharpening of the basal reflections of the kaolinite. These stages were also shown by the DTA-TG curves for the complex. The TG curve indicated that the loss of ~15% of the intercalated DMSO occurs below 150°C, and caused the disruption of the structure. The remaining molecules, forming stronger bonds with the kaolinite surfaces, were lost between 150 and 300°C.
Synthesis of Ni-rich 1:1 phyllosilicates
- Maria Bentabol, Maria Dolores Ruiz Cruz, F. Javier Huertas
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- Journal:
- Clays and Clay Minerals / Volume 55 / Issue 6 / December 2007
- Published online by Cambridge University Press:
- 01 January 2024, pp. 572-582
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Rapid dissolution of partly amorphized kaolinite in the systems kaolinite + NiCl2, kaolinite + Ni(OH)2, and kaolinite + NiCl2 + Ni(OH)2, at a temperature of 200°C and at pH between 5.3 and 7.4, leads to the precipitation of Ni-poor kaolinite, Ni-rich kaolinite and Al-Ni-serpentine. Identification of the phases was carried out using a combination of X-ray diffraction and transmission/analytical electron microscopy. Ni-bearing kaolinite shows variable morphologies in the systems studied: stacks of kaolinite with relatively small Ni contents and fine-grained curved particles of Ni-rich kaolinite dominate in the Cl-bearing system; spherical particles with a disordered structure and relatively uniform Ni contents (in the order of 0.15 atoms per formula unit (a.p.f.u.)) and platy particles of Al-Ni-serpentine characterize the products formed in the Ni(OH)2-richest systems. The presence of Ni(OH)2 in the systems (with and without Cl) favors the dissolution process as well as rapid precipitation of spherical particles, and the formation of serpentine. A difference from Mg systems studied previously is a well defined phase intermediate in composition between kaolinite and serpentine which originated in the Ni-bearing systems. Increasing Ni content is clearly reflected in the parallel increase in the b cell parameter of kaolinite. The average composition of the coexisting Al-Ni-serpentine is: (Al1.24Ti0.01Fe0.02Ni1.31) (Si1.58Al0.42)O5(OH,Cl)2.
Extensive dickitization of the permo-triassic fluvial sandstones from the eastern Iberian Range, Spain
- J. D. Martín-Martín, D. Gómez-Gras, T. Sanfeliu, M. Thiry, M. D. Ruiz-Cruz, F. Franco
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- Journal:
- Clays and Clay Minerals / Volume 55 / Issue 5 / October 2007
- Published online by Cambridge University Press:
- 01 January 2024, pp. 481-490
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Diagenetic kaolin minerals are very common in the Permo-Triassic succession from the SE Iberian Range, Spain. The morphology and crystal structure of kaolin minerals has been examined in four size fractions (<1 µm, <2 µm, <6.3 µm and <20 µm) of sandstone samples by means of scanning electron microscopy, X-ray diffraction, infrared spectroscopy, differential thermal analysis and thermogravimetry. Experimental data reveal that dickite is the dominant kaolin-type mineral in the entire range of size fractions, whereas small amounts of kaolinite coexists with dickite in all size fractions. Dickite appears typically as booklets of pseudo-hexagonal plates with blocky habit. The increase in size fraction is concomitant with the increase in the amount of dickite and the progressive improvement of its structural order. The extensive dickitization is attributed to the high paleogeothermal gradient recorded in the studied area and the increase in H+, presumably resulting from the flux of organic acids derived from the underlying Carboniferous rocks and/or the late Permian succession. These conditions are more likely to be associated with the late Cretaceous post-rift thermal stage of the eastern Iberian Basin. Lately, during the maximum burial depth, the fine crystalline kaolin minerals were slightly illitized. Given the very small feldspar content in the studied sequence, the results reflect the important contribution of mica alteration to the early diagenetic formation of kaolinite as well as the late conversion to dickite.
Transmission Electron Microscopy Evidence for Experimental Illitization of Smectite in K-Enriched Seawater Solution at 50°C and Basic pH
- A. Drief, F. Martinez-Ruiz, F. Nieto, N. Velilla Sanchez
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- Clays and Clay Minerals / Volume 50 / Issue 6 / December 2002
- Published online by Cambridge University Press:
- 01 January 2024, pp. 746-756
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Experimental illitization of smectite was studied by transmission electron microscopy (TEM) and X-ray diffraction (XRD). Experiments were performed on the <2 µm fraction consisting entirely of smectite separated from a soil formed on subvolcanic rock located in the External Zone of the Betic Cordilleras (southern Spain). Amounts of 0.25 g were added to different solutions: seawater, and three K-enriched seawater solutions prepared by adding KOH to seawater whose final [K] values were 0.1, 0.5 and 1 M, respectively. The experiments were performed at 50°C over a period of 30 days. The XRD patterns showed no mineralogical changes in residues from seawater or from the 0.1 M [K] solution. With increasing pH and K molarity, the smectite peak, initially at 1.4 nm, became broader. This change in the smectite peak was more significant in the residue from the 1 M [K] solution. The appearance of a small shoulder at 1.0 nm in the residue from a 0.5 M [K] solution showed the beginning of illite formation. However, its appearance was clearer in XRD patterns of the residue corresponding to the 1 M [K] solution. The XRD data from air-dried, glycolated, and heated samples from the 1 M [K] solution indicated the presence of smectite, disordered interstratified illite-smectite (I-S) and illite.
The TEM/AEM studies were performed on the residue corresponding to the 1 M [K] experiment. The HRTEM images revealed that smectite and illite occurred as separated packets with a ferroan lizardite, as a by-product of the smectite-to-illite reaction, interstratified and intergrown with illite. Smectite occurs both as ‘rims’ on the illite packet and in its core. The presence of smectite in the core of illite packet indicates that the lateral transition from smectite to illite was incomplete, taking place by direct replacement of smectite layers as a whole through a dissolution-precipitation mechanism. The experimental study shows that smectite may transform in a wide range of geological and artificial environments involving high-pH K-rich solutions.
Students’ emotional well-being and religiosity during the COVID-19 pandemic- an international study in 7 countries
- K. H. Karakula, A. Forma, R. Sitarz, J. Baj, D. Juchnowicz, J. Bogucki, W. Tuszyńska-Bogucka, M. L. Tee, C. A. Tee, J. T. Ly-Uson, M. S. Islam, M. T. Sikder, A. H. El-Monshed, A. Loutfy, M. F. Hussain Qureshi, M. Abbas, S. Taseen, M. Lakhani, S. Jayakumar, S. Ilango, S. Kumar, Á. A. Ruiz-Chow, A. Iturbide, D. D. González-Mille, H. Karakula-Juchnowicz
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- Journal:
- European Psychiatry / Volume 66 / Issue S1 / March 2023
- Published online by Cambridge University Press:
- 19 July 2023, p. S406
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Introduction
There are no conclusive findings about the possible protective role of religion on students’ mental health during the COVID-19 pandemic. Therefore, more research is needed.
ObjectivesThe purpose of this study was to assess the relationship between the level of emotional distress and religiosity among students from 7 different countries during the COVID-19 pandemic.
MethodsData were collected by an online cross-sectional survey that was distributed amongst Polish (N = 1196), Bengali (N = 1537), Indian (N = 483), Mexican (N = 231), Egyptian (N = 565), Philippine (N = 2062), and Pakistani (N = 506) students (N = 6642) from 12th April to 1st June 2021. The respondents were asked several questions regarding their religiosity which was measured by The Duke University Religion Index (DUREL), the emotional distress was measured by the Depression, Anxiety, and Stress Scale-21 (DASS-21).
ResultsEgypt with Islam as the dominant religion showed the greatest temple attendance (organizational religious activity: M=5.27±1.36) and spirituality (intrinsic religiosity: M=5.27±1.36), p<0.0001. On another hand, Egyptian students had the lowest emotional distress measured in all categories DASS-21 (depression: M=4.87±10.17, anxiety: M=4.78±10.13, stress: M=20.76±11.46). Two countries with the dominant Christian religion achieved the highest score for private religious activities (non-organizational religious activity; Mexico: M=3.94±0.94, Poland: M=3.63±1.20; p<0.0001) and experienced a moderate level of depressive symptoms, anxiety, and stress. Students from Mexico presented the lowest attendance to church (M=2.46±1,39) and spirituality (M=6.68± 3.41) and had the second highest level of depressive symptoms (M=19.13±13.03) and stress (M=20.27±1.98). Philippines students had the highest DASS-21 score (depression: M=22.77±12.58, anxiety: M=16.07±10.77, stress: M=4.87±10.08) and their level of religiosity reached average values in the whole group. The performed regression analysis confirmed the importance of the 3 dimensions (organizational religious activity, non-organizational religious activity, intrinsic religiosity) of religiosity for the well-being of students, except for the relationship between anxiety and private religious activities. The result was as presented for depression: R2=0.0398, F(3.664)=91.764, p<0.0001, SE of E: 12.88; anxiety: R2=0.0124, F(3.664)=27.683, p<0.0001, SE of E: 10,62; stress: R2= 0.0350, F(3.664)=80.363, p<0.0001, SE of E: 12.30.
ConclusionsThe higher commitment to organizational religious activity, non-organizational religious activity, and intrinsic religiositywas correlated with the lower level of depressive symptoms, stress, and anxiety among students during the COVID-19 pandemic, but taking into account factors related to religiosity explains the level of emotional well-being to a small extent.
Disclosure of InterestNone Declared
Effects of intrahipocampal nmda on re-extinction of an aversive emotional memory task in rats
- E. P. Ruiz Gonzalez, D. M. Gómez Ordoñez, L. F. Cárdenas, M. N. Muñoz Argel
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- Journal:
- European Psychiatry / Volume 66 / Issue S1 / March 2023
- Published online by Cambridge University Press:
- 19 July 2023, p. S613
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Introduction
N-Methyl-D-aspartate (NMDA) receptors are involved in learning and memory. It is known that ventral hippocampus is a crucial structure involved in emotional memory formation mainly for fear and anxiety situations. The aim of this research is to identify the effect of the stimulation of ventral hipocampal NMDA receptors on the reextinction of an aversive emotional memory task. NMDA (0.2 ug/μl; 0.2 μl) or saline (0.9 %; 0.2 μl) was bilateral and locally administered in the ventral hippocampus of male Wistar rats, before the re-instatement trial.
The experimental group consisted of 10 animals and the control group by 9 subjects. The results suggest that the activation of ventral hipocampal NMDA receptors induces an increase in the time needed to re-extinguish the conditioned fear, suggesting a possible potentiating effect on re-installation.
ObjectivesTo evaluate the effect of NMDA at the intrahippocampal level, on the reinstatement and re extinction of a conditioned fear response in male Wistar rats.
MethodsThis study is experimental, where two groups of adult male Wistar rats were used. The bilateral cannulas was implanted, the animals were injected intraperitoneally with a mixture of ketamine (Rotexmédica) and xylacin (Bayer; 75 mg/Kg and 5 mg/Kg), respectively, then the animals were placed in a stereotaxic apparatus (Narishige) and injected with veterinary antibiotic.The (21G) caliber cannulas were bilaterally implanted in HPv at the following coordinates: AP = -5.2 mm relative to Bregma; ML = ± 5 mm in relation to the midline and DV = 5.1 mm in relation to the skull and according to the atlas (Paxinos & Watson, 1985).
ResultsIt was observed that in the first phase of extinction there were no statistically significant differences between the two groups, experimental and control, as in the second phase of extinction. The results obtained for the re-extinction phase 1 and 2 showed that there were significant statistical differences between the groups. This difference was only evident in the first three minutes in the two phases of re-extinction.
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ConclusionsStatistically significant differences were observed between the two groups, in the phases of re-extinction, seeing a longer time of the freezing response in the experimental group, as an effect of the application of NMDA in the ventral hippocampus (HPv), which suggests that this substance has a memory-enhancing effect, and therefore contributes to increasing the permanence of the fear response. It should be noted that this difference was only evident in the first three minutes in the two re-extinction phases. These results may be related to other studies where it has been shown that LTP is dependent on the N-methyl-D-aspartate receptor in the CA1 region in vivo (Zhong, Cherry, Bies, Florence, & Gerges, 2009)
Disclosure of InterestNone Declared
A qualitative investigation of healthcare professionals’ viewpoints of the healthcare process of persons with a serious mental illness in prisons with a traditional model for mental health care provision in Spain
- A. Calcedo-Barba, S. Paz Ruiz, V. Estévez Closas, Á. López López, L. F. Barrios, J. Antón Basanta
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- European Psychiatry / Volume 66 / Issue S1 / March 2023
- Published online by Cambridge University Press:
- 19 July 2023, p. S167
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Introduction
Healthcare delivery in prisons depends on the national Ministry of Interior in 14 of 17 autonomous regions in Spain. A traditional model for health and mental health care provision prevails.
ObjectivesTo increase understanding of the mental health care process of imprisoned persons with a serious mental illness (SMI) in Spanish prisons with a traditional model of health care provision.
Methods10 healthcare professionals (6 physicians, 3 nurses, 1 pharmacist) working in small (<450 imprisoners), middle size (450-1,000) and big (>1,000) prisons took part in 3 online focus groups between 31st May and 2nd June 2022. The moderator used open-ended questions to research into the healthcare process (diagnosis, treatment, follow up, prevention) of imprisoners with SMI. Focus groups lasted 2 hours, and were audiotape recorded and transcribed. Transcripts were analysed applying constant comparative method and theoretical saturation.
ResultsMental healthcare provision varies across prisons, but commonalities exist. Healthcare professionals reported that about 60% of SMI are diagnosed by the correctional general practice physician (GP) at incarceration. Severe cases are assessed by an external psychiatrist. Once a week (average) the psychiatrist visits the prison to either confirm diagnoses or adjust treatments. One third of imprisoners who would benefit from a psychiatric assessment has it. Follow up occurs in the prison infirmary for close supervision. If addiction concurs, referral to therapeutic modules happen. Polypharmacy and overmedication are common. Simplification of therapies and slow-release injectable formulations of antipsychotics are desirable. Everyday mental health care and rehabilitation take place throughout a specific, little equipped, psycho-social support programme implemented in most prisons but restricted to the most disabled SMI persons. Acute psychiatric episodes occur due to treatment interruptions or deviations and are managed by the correctional GP. Hospital referrals are problematic without protocols. Prevention of relapses relies on imprisoners supervision and staff observation. Healthcare records are only available to healthcare professionals working in prisons. Outside prisons, continued care needs of mental health and social support in the community. Due to healthcare services modest readiness to respond to needs and poor social networks, SMI persons are prone to relapse and recidivism.
ConclusionsFocus groups found that working in isolation from the public healthcare system, shortage of psychiatrists, poorly implemented therapeutic and rehabilitation programmes, and lack of mental health and social care services in the community negatively affect the care of imprisoners with SMI in Spain.
Disclosure of InterestNone Declared
Cannabis use in different mental disorders: a descriptive study in a psychiatric hospital
- B. Samso, A. López Fariña, C. González Navarro, L. Morado San Segundo, A. Bilbao Idarraga, U. López Puentes, R. F. Lopez Brokate, T. Ruiz de Azua Aspizua, U. Ortega Pozas, C. Arán Cisneros, E. Garnica de Cos, I. Alonso Salas
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- European Psychiatry / Volume 66 / Issue S1 / March 2023
- Published online by Cambridge University Press:
- 19 July 2023, pp. S334-S335
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Introduction
In the last decade, the prevalence of THC use is increasing among adolescents and adults. There is also strong evidence to suggest that cannabis use is associated with psychiatric comorbidities. The strongest evidence is found between cannabis use and psychotic disorder. However, the literature shows that those who have used cannabis in the past or for a large part of their lives are at higher risk of mood disorders, anxiety, personality disorder or other drug use than those who do not use cannabis in a harmful way.
ObjectivesTo provide an overview of the association between cannabis use and the different mental pathologies presented by the patients admitted during the study period. To describe the prevalence of THC use in the study according to the mental pathology presented by the patient.
MethodsA retrospective observational descriptive study was developed for 3 months, of all patients admitted to the acute unit of the psychiatric hospital. No exclusion criteria were included.
ResultsDuring the period of study 172 patients were admitted to the hospital, classified according to the main diagnosis we have: 49 patients suffer from schizophrenia, 26 bipolar affective disorder, 20 with depressive disorder, 20 with personality disorder, 19 with substance use disorder, 18 with other unspecified disorders and 20 patients with no known previous diagnosis. The prevalence of THC use in the study sample according to diagnosis, would be schizophrenia 16%, Bipolar affective disorder 19%, Depressive disorder 5%, Personality disorder 45%, Substance use disorder 21%, Unspecified disorders 11% and patients with no known previous diagnosis 10%.
ConclusionsThe results obtained in the study in terms of THC use are in agreement with those obtained in the literature. In our study, we observed that cannabis use is associated with psychotic disorders as well as with mood, personality and substance abuse disorders. Given that the frequency of use has increased and there is a strong association with different comorbid psychiatric diagnoses, guidance on modifications in medication strategies might be necessary.
Disclosure of InterestNone Declared
Positive relationships and academic stressors in the post-pandemic context of covid-19 in adolescents from a school in Córdoba, Colombia.
- E. P. Ruiz Gonzalez, M. F. Martinez Burgos, V. Contrera Montiel, M. N. Muñoz Argel, J. J. Diaz Muñoz
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- European Psychiatry / Volume 66 / Issue S1 / March 2023
- Published online by Cambridge University Press:
- 19 July 2023, p. S214
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Introduction
Berscheid (1999), taken from Lacunza & Contini (2016), indicated that social relations were the foundation of the human condition. From positive psychology, Park et al. (2013) point out good relationships as a factor that contributes to a good psychological life, since they provide emotional and instrumental support in times of stress and challenge, indicating, in turn, normal evolutionary development and the avoidance of psychopathological problems.
ObjectivesTo establish the relationship between positive relationships and the presence of stressors in adolescents.
MethodsA cross-sectional, descriptive-correlational study was carried out in 109 (N= 109) adolescents. The SISCO Inventory was used to study academic stress as well as the Ryff Psychological Well-Being Scale.
ResultsA negative magnitude correlation was found between positive relationships and stressors. ( Table 1).
As a secondary result, 60.6% of the evaluated adolescents presented life purpos as the factor with the highest score in the psychological well-being variable. This points to authors such as Erikson (1988, p. 96), who define adolescence as a space characterized by feelings of creativity, productivity, new ideas, and a period of cognitive and social maturation, which leads to a definitive commitment to life itself. (Graph 1).
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ConclusionsPositive relationships in adolescents decrease the presence of stimuli considered stressors.
Disclosure of InterestNone Declared
Adherence to psychiatric medications and diagnosis
- C. González Navarro, A. Bilbao Idarraga, I. Alonso Salas, L. Morado San segundo, A. López Fariña, U. López Puentes, B. Samsó Martínez, R. F. Lopez Brokate, T. Ruiz de Azua Aspizua, E. M. Garnica de Cos, U. Ortega Pozas
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- European Psychiatry / Volume 66 / Issue S1 / March 2023
- Published online by Cambridge University Press:
- 19 July 2023, pp. S240-S241
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Introduction
Patients with mental disorders frequently become non-adherent during their long term prescribed treatment. This situation frequently triggers clinical worsening and hospital admission. Therefore, non-adherence may result in poorer long term clinical outcomes and has economic implications for health-care providers (Carlos De las Cuevas et al. Neuropsychopharmacol Hung 2021; 23(4):347-362).
Objectives- To describe the adherence to oral and long acting injectable treatment in the sample of patients that were admitted to the short stay hospital unit during the period of study.
- To describe the adherence to treatment amongst psychiatric diagnosis in the sample of study.
MethodsIt was a retrospective observational study with a duration of three months. Data was collected from all patients admitted to the short stay hospital unit during the period of study and there were no specific exclusion criteria. Descriptive statistics were performed. To assess the adherence to pharmachological treatment the patient report, the family report and the pharmacy dispensation according to the existent informatic prescription platform was considered. Regarding the long acting injectable treatment the formulary of administration in the clinical history was checked.
ResultsDuring the period of study 172 patients were admitted to the short stay hospital unit. Of those, 146 patients had a previous pharmacologic prescription. Data of treatment was not possible to obtain in 7 patients. In the sample of study, 83.5% were on oral and 16.5% on long acting injectable treatment. The general adherence to treatment in the sample was 61.87%. In the oral treatment group the adherence was 58.4% and in the long acting injectable treatment group was 65.2%.
Amongst the different psychiatric diagnoses the outcomes of adherence to treatment were: 60.4% in schizophrenia and related psychosis, 62.5% in bipolar disorder, 78.6% in depression, 58.3% in personality disorders and 62% in addictive disorders.
ConclusionsIn our descriptive study adherence to treatment was higher in the long acting injectable treatment group, agreeing with the existent scientific literature.
The results of adherence for schizophrenia and bipolar disorder are similar to the ones found in scientific literature but differ from the ones for depression, being higher in our sample (Judit Lazary et al. Neuropsychopharmacol Hung 2021;23(4): 347-362). Moreover, in scientific literature it is found a similar prevalence of adherence across diagnosis (for schizophrenia, bipolar disorder and depression) whereas in our sample patients with depression showed a different and higher adherence to treatment (Judit Lazary et al. Neuropsychopharmacol Hung 2021;23(4): 347-362). In our sample, patients with personality disorders had the lowest adherence to treatment.
Disclosure of InterestNone Declared
Facing the COVID-19 pandemic – an assessment of students’ mental health and major coping strategies during the COVID-19 pandemic – an international study
- A. A. Forma, K. H. Karakuła, R. Sitarz, D. Juchnowicz, J. Baj, J. Bogucki, J. Rog, M. L. Tee, C. A. Tee, J. T. Ly-Uson, M. S. Islam, M. T. Sikder, A. H. El-Monshed, A. Loutfy, M. F. H. Qureshi, M. Abbas, S. Taseen, M. Lakhani, C. Wang, X. Wan, Y. Tan, R. Pan, R. Ho, S. Jayakumar, S. Ilango, S. Kumar K, Á. A. Ruiz-Chow, A. Iturbide, D. D. González-Mille, L. P. Doan, H. Karakuła-Juchnowicz
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- European Psychiatry / Volume 66 / Issue S1 / March 2023
- Published online by Cambridge University Press:
- 19 July 2023, pp. S152-S153
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Introduction
TDuring COVID-19 pandemic, it was noticed that it was students who were mostly affected by the changes that aroused because of the pandemic. The interesting part is whether students’ well-being could be associated with their fields of study as well as coping strategies.
ObjectivesIn this study, we aimed to assess 1) the mental health of students from nine countries with a particular focus on depression, anxiety, and stress levels and their fields of study, 2) the major coping strategies of students after one year of the COVID-19 pandemic.
MethodsWe conducted an anonymous online cross-sectional survey on 12th April – 1st June 2021 that was distributed among the students from Poland, Mexico, Egypt, India, Pakistan, China, Vietnam, Philippines, and Bangladesh. To measure the emotional distress, we used the Depression, Anxiety, and Stress Scale-21 (DASS-21), and to identify the major coping strategies of students - the Brief-COPE.
ResultsWe gathered 7219 responses from students studying five major studies: medical studies (N=2821), social sciences (N=1471), technical sciences (N=891), artistic/humanistic studies (N=1094), sciences (N=942). The greatest intensity of depression (M=18.29±13.83; moderate intensity), anxiety (M=13.13±11.37; moderate intensity ), and stress (M=17.86±12.94; mild intensity) was observed among sciences students. Medical students presented the lowest intensity of all three components - depression (M=13.31±12.45; mild intensity), anxiety (M=10.37±10.57; moderate intensity), and stress (M=13.65±11.94; mild intensity). Students of all fields primarily used acceptance and self-distraction as their coping mechanisms, while the least commonly used were self-blame, denial, and substance use. The group of coping mechanisms the most frequently used was ‘emotional focus’. Medical students statistically less often used avoidant coping strategies compared to other fields of study. Substance use was only one coping mechanism that did not statistically differ between students of different fields of study. Behavioral disengagement presented the highest correlation with depression (r=0.54), anxiety (r=0.48), and stress (r=0.47) while religion presented the lowest positive correlation with depression (r=0.07), anxiety (r=0.14), and stress (r=0.11).
Conclusions1) The greatest intensity of depression, anxiety, and stress was observed among sciences students, while the lowest intensity of those components was found among students studying medicine.
2) Not using avoidant coping strategies might be associated with lower intensity of all DASS components among students.
3) Behavioral disengagement might be strongly associated with greater intensity of depression, anxiety, and stress among students.
4) There was no coping mechanism that provided the alleviation of emotional distress in all the fields of studies of students.
Disclosure of InterestNone Declared
Alcohol consumption and cardiovascular risk: a descriptive study in a psychiatric short stay unit
- C. González Navarro, I. Alonso Salas, L. Morado San segundo, A. López Fariña, A. Bilbao Idarraga, U. López Puentes, B. Samsó Martínez, R. F. Lopez Brokate, T. Ruiz de Azua Aspizua, E. M. Garnica de Cos, U. Ortega Pozas
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- Journal:
- European Psychiatry / Volume 66 / Issue S1 / March 2023
- Published online by Cambridge University Press:
- 19 July 2023, p. S754
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Introduction
Patients with mental disorders have a decreased life expectancy, being the main reason the cardiovascular disease. An important proportion of patients present a comorbid drug consumption. Amongst drugs, alcohol is the most frequent, and it is associated with a higher cardiovascular risk. The metabolic syndrome is one of the most employed tools to assess cardiovascular risk.
Objectives- To describe the demographic characteristics of the patients with an active alcohol consumption that were admitted to the hospital during the period of study.
- To describe the prevalence of metabolic syndrome in the sample, according to the Adult Treatment Panel III (ATP-III) criteria.
MethodsRetrospective observational study of three months duration. Data was collected from all patients admitted to the hospital during the period of study, with no specific exclusion criteria. Descriptive statistics were performed.
ResultsDuring the period of study 172 patients were admitted to the hospital (56.4% women and 43.6% men). A 44.8% presented alcohol consumption (25% sporadically, 6.4% weekly and 13.4% daily). Amongst women, 1% presented daily and 1% weekly consumption. Amongst men, 21.3% presented daily and 5.3% weekly consumption.
The prevalence of metabolic syndrome in the study sample was 29.11%. In the alcohol consumption group, the prevalence was 24.7% and differed according to the pattern of consumption: 43.5% in the daily consumption group, 27.3% in the weekly and 14% in the sporadically consumption group.
ConclusionsOn the one hand, in the sample of study a higher percentage of men present an active alcohol consumption, compared to women. It is remarkable the high percentage of daily alcohol consumption amongst men in our sample.
On the other hand, the prevalence of metabolic syndrome in our sample is similar to the one found in scientific literature regarding patients with mental disorders. It is noteworthy in our sample the increased prevalence of metabolic syndrome found in patients with a daily alcohol consumption, and a decreased prevalence in those with a sporadic pattern.
Disclosure of InterestNone Declared
‘Main the gap!’ The view of healthcare professionals on gains and pitfalls of traditional and innovative models for providing mental health care to imprisoned persons with a severe mental illness in Spain
- J. Antón Basanta, S. Paz Ruiz, V. P. Estévez Closas, Á. López López, L. F. Barrios, A. Calcedo-Barba
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- Journal:
- European Psychiatry / Volume 66 / Issue S1 / March 2023
- Published online by Cambridge University Press:
- 19 July 2023, pp. S468-S469
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Introduction
Different mental health care provision models coexist in prisons in Spain. The Ministry of Interior applies a traditional model to secure mental health care to 83% of the country imprisoned population. Three autonomous regions with acquired competencies for health care provision (17% of the imprisoned population) are implementing innovative care models.
ObjectivesTo explore the views of healthcare professionals on models of mental health care provision for imprisoned persons with a serious mental illness (SMI) in Spain.
Methods21 healthcare professionals (13 physicians, 5 nurses, 3 pharmacists) working in prisons, penitentiary psychiatric hospitals and a psychiatric in-prison unit took part in 5 online, 2 hours focus groups and one in-deep interview between 31st May and 20th July 2022. The moderator used open-ended questions to research into the characteristics of mental health care models and on the challenges for implementation. Focus groups were audiotape recorded and transcribed. Transcripts were analysed applying thematic analysis.
ResultsHealthcare professionals reported that within the traditional model of healthcare provision, the psychiatric care of SMI imprisoners relies on correctional general practitioner physicians (GP). Psychiatrists act as external care providers. There are two psychiatric penitentiary hospitals with a strong correctional character for in-hospital care. Acute psychiatric care happens in prisons or at the local general hospital. Healthcare records remain within the penitentiary organization and outside the accesible healthcare information system. In consequence, there is fragmentation and delocalization of mental health care. An innovative approach consists of a dedicated mental healthcare unit within the prison with continuous psychiatric supervision of imprisoners with SMI and good quality psychiatric care. Schizophrenia and hyperactive attention deficit disorder persons benefit the most. Continued mental health care in the community remains a challenge. Another model of care is centred in the SMI imprisoned person. Acute and rehabilitation psychiatric penitentiary units operate within a network of mental health and social care resources in the community, coordinated by a liaison nurse. Individualised care plans keep SMI persons in their social environment. Costs of implementation are high. Clear definition of roles; investment in dedicated staff and shared information systems are challenges to overcome.
ConclusionsInnovative models of mental health care are needed to benefit imprisoned persons with a SMI in Spain. A decided national and regional will is paramount to overcome challenges.
Disclosure of InterestNone Declared
How do men differ from women? Case-Control study on clinic and personality characteristics of eating disorders
- F. Ruiz Guerrero, J. Gonzalez Gómez, C. Cobo Gutierrez, L. Castro Fuentes, C. Hernández Jimenez, J. Romay González, A. Gómez del Barrio
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- Journal:
- European Psychiatry / Volume 66 / Issue S1 / March 2023
- Published online by Cambridge University Press:
- 19 July 2023, pp. S849-S850
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Introduction
A review of the literature shows how female sex is a crucial factor in the development of ED, being the proportion of women and men 10 to 1 regardless of the location of the sample (Duncan, Ziobrowski & Nicol, 2017) and different clinical subtypes (AN, BN) (Swanson et al., 2011). However, male population has always been less studied, some works find that only 1% of the articles published in AN is aimed at the study of males (Galusca, 2012).
Nowadays it is accepted that the etiopathogenesis of these disorders is multifactorial and in addition to female gender other risk factors have been identified, such as neurobiological alterations, psychological predictors, personality traits, low self-esteem, extreme perfectionism or thinness values focused on body and figure. On the other hand, certain impulsive behaviours such as self-harm, substance use, physical activity or diets are factors that may be confused as predisposing or as symptoms of the pathology itself (Connan et al., 2003, Treasure, Stein and Maguire, 2015).
Recently, Kinasz, Accurso, Kass and Le Grange (2016) have compared the clinical characteristics that differentiate men (59) from women (560) in a sample of children and adolescents between 6 and 18 years-old, finding that males presented an earlier start of the ED and not appreciating differences in the duration of the disease, income, episodes of purgue and psychiatric comorbidity of anxiety, behaviour disorders or impulsivity.
ObjectivesThe aim of this study was to evaluate gender differences in clinical characteristics, levels of depression, previous obsessiveness and personality dimensions in eating disorders (ED) compared with controls.
MethodsA total of 80 participants was divided into 4 groups, 20 men and 20 women with ED and 20 men and 20 women without ED (healthy control), matched by age and socioeconomic status. The design of the study was case-control, and data was collected through clinical interview and a battery of cuestionaires.
ResultsMen with ED only differ in vigorous physical activity (measured by IPAQ) from controls and women with pathology. Regarding personality traits, men and women with ED do not differ among them, although they do differ in novelty search and harm avoidance respect to their controls.
ConclusionsBehaviors such as physical activity in males frame a slightly different way of reducing their discomfort, however, clinical implication indicates that the treatment may be similar according to gender.
Disclosure of InterestNone Declared
Thyroid disorders in psychiatric patients: a descriptive study in a psychiatric hospital
- U. López, L. Morado San Segundo, C. González Navarro, I. Alonso Salas, A. López Fariña, A. Bilbao Idarraga, B. Samsó Martínez, R. F. López Brokate, E. M. Garnica de Cos, T. Ruiz de Azua Aspizua, U. Ortega Pozas
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- European Psychiatry / Volume 66 / Issue S1 / March 2023
- Published online by Cambridge University Press:
- 19 July 2023, p. S471
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Introduction
Thyroid disorders can present with psychiatric symptons similar to depression, and, at the same time, certain treatments, like litio, can cause changes in thyroid function. Given, therefore, the importance for the treatment and care of patients, the study of thyroid function is one of the parametres that should be requested in patients with psychiatric pathology.
ObjectivesTo study the frequency of thyroid disorders in patients who where admitted to a psychiatric short stay unit.
MethodsRetrospective descriptive observational study is carried out in the acute stay unit of a psychiatric hospital. As a sample, all patients admitted to the unit over a period of three months. During admission, their sociodemographic data, the treatment they receive and their diagnosis are recorded. Secondly, blood test are performed whith differents parameters, including TSH values.
ResultsIn the total sample of 172 patients, 8 of them have TSH abnormalities. 7 of them, all women, present hypothyroidism values.
A single male patient presented values of hyperthryroidism.
ConclusionsAccording to the present study, 4,6% of the patients present alterations at the TSH at admission, although except in one case, the values were not markedly altered.
The thyroid study at admission allows detecting cases of altered TSH that are amenable to treatment and monitoring.
Disclosure of InterestNone Declared
Under-diagnosis of alcohol abuse: a descriptive study in a psychiatric hospital
- A. Lopez Fariña, U. López Puentes, I. Alonso Salas, C. Gonzalez Navarro, A. Bilbao Idarraga, L. Morado Sansegundo, U. Ortega Pozas, C. Aran Cisneros, B. Samso Martinez, R. F. Lopez Brokate, T. Ruiz de Azua Aspizua, E. M. Garnica De Cos
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- Journal:
- European Psychiatry / Volume 66 / Issue S1 / March 2023
- Published online by Cambridge University Press:
- 19 July 2023, p. S333
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Introduction
Incidence of alcohol abuse in our country is high, although it is still under-diagnosed and under-treated. The WHO estimates that a total of 3.3 million deaths worldwide per year are related to alcohol consumption.
ObjectivesThe main objective is to describe the pattern of alcohol consumption in a sample of patients who are admitted to our psychiatric hospital for different reasons, relating with previous diagnoses.
MethodsA retrospective observational descriptive study was carried out in the acute care unit of the psychiatric hospital, after approval of the corresponding protocol by the ethics committee. All patients admitted to this unit during a three-month period were taken as a sample. During admission, sociodemographic data, drug use, treatment type and time and previous diagnoses were collected.
ResultsOut of 172 patients, 81 reported being abstemious, 45 declared occasional consumption, 11 weekly and 22 daily consumption. There is no data about 13 patients. Among those who reported daily alcohol consumption, 59% had a previous diagnosis of Substance Use Disorder (SUD), 23% a previous diagnosis of Schizophrenia, 13.5% of Bipolar Disorder and finally 4.5% of Depressive Disorder. All the patients with a previous diagnosis of SUD reported consumption of more than 10 SDUs/day, the group with Schizophrenia stated less than 5 SDUs/day, of the group with T. Bipolar between 7-10 SDUs/day and with T. Depressive 5 SDUs/day.
ConclusionsThe results obtained are consistent with the literature in relation to the under-diagnosis of alcohol use disorder, taking into account that 40% of patients in the sample with daily alcohol consumption previously had not such a diagnosis and it was not recorded in their medical history. For this reason, and for the sake of being able to treat them, it is essential to question all patients about alcohol consumption, whatever the reason for their admission.
Disclosure of InterestNone Declared
Tetrathyridia in an endemic lizard from Chile: molecular evidence for South America
- J. P. Correa, F. Farías, E. San Juan, A. Yáñez-Meza, S. Muñoz-Leal, C. Botto-Mahan, P. Oyarzún-Ruiz
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- Journal of Helminthology / Volume 97 / 2023
- Published online by Cambridge University Press:
- 29 June 2023, e51
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Mesocestoides is a controversial tapeworm with significant lack of data related to systematics and life cycles. This helminth has an indirect life cycle with vertebrates, mostly carnivorous mammals, as definitive hosts. Theoretically, a coprophagous arthropod would be the first intermediate host, and herptiles, mammals, and birds, which prey on these insects, would represent the second intermediate hosts. However, recent evidence suggests that this life cycle would require only two hosts, with no arthropods involved. In the Neotropics, although there are records of mammals and reptiles as hosts for Mescocestoides, no molecular analyses have been performed. This work aimed to record an additional intermediate host and molecularly characterize the isolated larvae. Thus, 18 braided tree iguanas (Liolaemus platei) from Northern Chile were collected and dissected during 2019. One lizard was parasitized by three morphotypes of larvae compatible with tetrathyridia of Mescocestoides. To achieve its specific identity, a molecular approach was performed: 18S rRNA and 12S rRNA loci were amplified through cPCR. The inferred phylogenies confirmed the morphological diagnosis and stated that all morphotypes were conspecifics. The sequences for both loci formed a monophyletic clade with high nodal support, representing a sister taxon to Mescocestoides clade C. This study represents the first molecular characterization of any taxon of Mescocestoides from the Neotropics. Future surveys from potential definitive hosts would help to elucidate its life cycle. Furthermore, an integrative taxonomic approach is required in additional studies from the Neotropical region, which would contribute to a better understanding of the evolutionary relationships of this genus.
Design and characterisation of a multi-DOF soft pneumatic module
- Israel Santacruz-Mondragon, X. Yamile Sandoval-Castro, Serhat Ibrahim, Mats Wiese, Annika Raatz, Maximiano F. Ruiz-Torres, Eduardo Castillo-Castaneda
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Bending and elongation have been some of the most studied motions in soft actuators due to the variety of their applications. For that matter, multi-DOF actuators have been developed with the purpose to generate different movements in a single actuator, mainly bending.
However, these actuators are still limited in mobility range, and some of them do not perform continuous curvatures. This paper presents the design, characterisation and implementations of a multi-DOF soft pneumatic module. The internal structure of the proposed module is composed of four channels, which generate bending in several directions. The finite element method analysis demonstrates that the actuator performs continuous curvatures for different pressure values. We present a repeatable and easy manufacturing process using the casting technique, considering the material Ecoflex 00-50; as well as the kinematic model of the actuator, taking into consideration two bending Degrees of Freedom (DOFs). Furthermore, we performed bending characterisation for all possible combinations of the four channels via computer vision, demonstrating a wide mobility range and performing continuous curvatures. Additionally, we evaluated the kinematic model with characterisation data, obtaining the angular and cartesian relationship between the pressure and continuous curvatures. On the other hand, the authors propose the design of a modular soft manipulator based on two multi-DOF modules. The kinematic model is reported. In addition, we implement a motion sequence in the manipulator to pick and place tasks.