Nazery Khalid - Research Fellow, Center for Economic Studies and Ocean Industries. Maritime Institute of Malaysia - reports that 7 of the world's 20 busiest terminals are in China. The port to watch is Shanghai, which is poised to overtake its main rivals (Hong Kong and Singapore). In 2005, Shanghai handled 443 million tons of cargo in total and 18.09 million twenty-foot equivalent units (TEUs) of containers, an increase of 24.2 percent compared with the previous year (Hong Kong handled 23.2 million TEUs and Singapore 22.43 TEUs). The Shanghai region is expected to handle 35 million TEUs of container traffic by 2010. This is because the port of Ningbo will continue its own frenetic expansion of capacity as well as install the world's longest bridge (the US$ 1.4 billion Hangzhou Bay Bridge) to cut the travel time to Shanghai to two hours. In addition, Shanghai is adding a deepwater facility in nearby Yangshan and working out deals with other North China ports to provide international service for them.

[China and East Asia are experiencing a harbour construction boom as the region gains a position of ascendance in global trade. Nazery Khalid - Research Fellow, Center for Economic Studies and Ocean Industries. Maritime Institute of Malaysia - reports that 7 of the world's 20 busiest terminals are in China. The port to watch is Shanghai, which is poised to overtake its main rivals (Hong Kong and Singapore). In 2005, Shanghai handled 443 million tons of cargo in total and 18.09 million twenty-foot equivalent units (TEUs) of containers, an increase of 24.2 percent compared with the previous year (Hong Kong handled 23.2 million TEUs and Singapore 22.43 TEUs). The Shanghai region is expected to handle 35 million TEUs of container traffic by 2010. This is because the port of Ningbo will continue its own frenetic expansion of capacity as well as install the world's longest bridge (the US$ 1.4 billion Hangzhou Bay Bridge) to cut the travel time to Shanghai to two hours. In addition, Shanghai is adding a deepwater facility in nearby Yangshan and working out deals with other North China ports to provide international service for them.

In 2005, more than 62,000 ships sailed through the Straits of Malacca, one of the world's busiest and most important shipping lanes. Linking East and Southeast Asia with the world, one third of world trade and half of global oil pass through the Straits.

With projected growth in global trade and the rise of East Asian economies, financial demands can be expected to grow on the littoral states—namely Malaysia, Indonesia and Singapore—to ensure navigation safety and control marine pollution. In addition, the heightened perception of risk to ships traversing the Straits due to threats of piracy and terrorism has led to increased security costs.

Considering that an estimated 80% of vessels traversing the Straits are on transit, the littoral states have called for burden sharing in various meetings and conferences over the years. However, there has been little follow-up by the stakeholders to collectively address the issue, and still less effort to come up with an acceptable and workable operating mechanism. Drawing on presentations at the recent International Maritime Organization Meeting (IMO) in Kuala Lumpur, this article presents a case for burden sharing in the Straits.

Mark J. Valencia and Nazery Khalid of the Maritime Institute of Malaysia write that the “vigilante” approach inherent in unilateral and multilateral initiatives to deal with piracy in the Gulf of Aden region has “provided an opportunity for naval powers to demonstrate their prowess, feel each other out, and establish the precedent of unilateral individual and group intervention in such situations.” Cooperative action amongst the littoral states of Southeast Asia has reduced piracy in that region: “the littoral states have invited co-operation from outside powers – as long as it on their terms and does not involve the independent use of armed force.” Valencia and Khalid conclude that “it is this strategy which must be pursued with increased vigour and vigilance if piracy and the new bogeyman of maritime terrorism are not to become internationally accepted excuses for foreign interventions.” Richard Tanter

The Straits of Malacca is one of the world's busiest and most important shipping lanes. It is a vital artery linking the region's economy with the rest of the world. Carrying a third of world trade and half of its oil supplies, security in the Straits is a concern of everyone with a stake in the waterway. Located in one of the world's most vibrant economic growth areas, the Straits is a pivotal link in international trade and transportation. It is therefore not surprising that security in the Straits is a matter of grave concern among the littoral states and internationally.

This article offers an holistic perspective on security in the Straits of Malacca. It attempts to counter the tendency by some analysts to view security in the Straits from the restrictive lens of piracy and terrorism, two issues which have dominated discourse on the subject of late. It lays out the extent of the challenges faced by the littoral states in managing security in the Straits and advocates a comprehensive approach in carrying out the task.

Asian corn borer, Ostrinia furnacalis Guenée (Lepidoptera: Crambidae), is a major pest in corn production, and its management remains a significant challenge. Current control methods, which rely heavily on synthetic chemical pesticides, are environmentally detrimental and unsustainable, necessitating the development of eco-friendly alternatives. This study investigates the potential of the entomopathogenic nematode Steinernema carpocapsae as a biological control agent for O. furnacalis pupae, focusing on its infection efficacy and the factors influencing its performance. We conducted a series of laboratory experiments to evaluate the effects of distance, pupal developmental stage, soil depth, and light conditions on nematode attraction, pupal mortality and sublethal impacts on pupal longevity and oviposition. Results demonstrated that S. carpocapsae exhibited the highest attraction to pupae at a 3 cm distance, with infection declining significantly at greater distances. Younger pupae (<12 h old), were more attractive to nematodes than older pupae, and female pupae were preferred over males. Nematode infection was highest on the head and thorax of pupae, with a significant reduction in infection observed after 24 h. Infection caused 100% mortality in pupae within 2 cm soil depth, though efficacy was reduced under light conditions. Sublethal effects included a significant reduction in the longevity of infected adults and a decrease in the number of eggs laid by infected females compared to controls. These findings underscore the potential of S. carpocapsae as an effective biocontrol agent for sustainable pest management in corn production, offering a viable alternative to chemical pesticides.

A purely elastic linear instability was recently reported for viscoelastic plane Poiseuille flow in the limit of ultra-dilute (solvent to solution viscosity ratio $\beta \gt 0.99$), highly elastic (Weissenberg number $W \sim 1000$) polymer solutions, within the framework of the Oldroyd-B model (Khalid et al., Phys. Rev. Lett., vol. 127, 2021, pp. 134–502). This is the first instance of a purely elastic instability in a strictly rectilinear shearing flow, with the phase speed of the unstable ‘centre mode’ being close to the base-state maximum velocity at the channel centreline. Subsequently, Buza, Page and Kerswell (J. Fluid Mech., vol. 940, 2022, A11) have shown, using the FENE-P model, that the centre-mode instability persists down to moderate elasticities ($W \sim O (100)$), the reduction in threshold evidently due to the finite extensibility of the polymer molecules. In this work, we augment this latter finding and provide a comprehensive account of the effect of finite extensibility on the centre-mode instability in viscoelastic channel flow, using the FENE-P and FENE-CR models, in both the absence and presence of fluid inertia. In both these models, finite extensibility causes a decrease in the polymer relaxation time at high shear rates, and the resulting weakening of elastic stresses would seem to indicate a stabilising effect. The latter trend has been demonstrated by earlier analyses of hoop-stress-driven instabilities in curvilinear flows, and is indeed borne out for the FENE-CR case, where finite extensibility has a largely stabilising influence on the centre-mode instability. In stark contrast, for the FENE-P model, finite extensibility plays a dual role – a stabilising one at lower values of the elasticity number $E$, but, surprisingly, a destabilising one at higher $E$ values. Further, the centre-mode instability is predicted over a significantly larger domain of the $Re$–$E$–$\beta$ parameter space, compared to the Oldroyd-B model, making it more amenable to experimental observations.

Is smaller better for economic development? We argue that states’ past population size can be a powerful determinant of current development. Among states that gained independence shortly after World War II, states with smaller populations in their early years of independence had stronger incentives to adopt more open trade policies and employ larger public sectors. These policies “embedded” smaller newly independent states into the global economy during the Cold War, building the foundations for more inclusive economic institutions and greater political stability. When the Cold War ended, smaller newly independent states were more likely to have developed the institutional infrastructure to prosper in the globalizing yet politically volatile early twenty-first century. We test this argument by examining the developmental trajectories of 83 states that became independent between 1946 and 1975. Newly independent states with smaller populations during this period have had on average higher levels and rates of post-Cold War development. They also had more open trade policies and larger public sectors during the Cold War. These policies correlate with more inclusive economic institutions and greater political stability in the post-Cold War era. A comparative case study of Oman and the People’s Democratic Republic of Yemen illustrates the mechanisms linking the size of newly independent states at independence and their post-Cold War development.

The Asian corn borer (ACB), Ostrinia furnacalis (Guenée, 1854), is a serious pest of several crops, particularly a destructive pest of maize and other cereals throughout most of Asia, including China, the Philippines, Indonesia, Malaysia, Thailand, Sri Lanka, India, Bangladesh, Japan, Korea, Vietnam, Laos, Myanmar, Afghanistan, Pakistan and Cambodia. It has long been known as a pest in South-east Asia and has invaded other parts of Asia, Solomon Islands, parts of Africa and certain regions of Australia and Russia. Consequently, worldwide efforts have been increased to ensure new control strategies for O. furnacalis management. In this article, we provide a comprehensive review of the ACB covering its (i) distribution (geographic range and seasonal variations), (ii) morphology and ecology (taxonomy, life-history, host plants and economic importance) and (iii) management strategies (which include agroecological approaches, mating disruption, integrated genetic approaches, chemical as well as biological control). Furthermore, we conclude this review with recommendations to provide some suggestions for improving eco-friendly pest management strategies to enhance the sustainable management of ACB in infested areas.

Understanding the interactive effects of temperature and diet on insect life cycles is crucial for effective pest management. Here, the influence of different temperatures and diets on the life cycle of Conogethes punctiferalis was investigated using the age-stage, two-sex life table analysis. The results support the hypothesis that temperature and diets (maize, apple, and artificial diet) significantly influence the entire life cycle performance of C. punctiferalis. The duration of larval development was significantly prolonged, whereas adult lifespan was shortened and showed lower reproductive capacity on apple and artificial diet than maize. The total pre-oviposition period was longer on apples than on maize and artificial diet at both temperatures (20, 26°C). The highest r (0.113 d−1), λ (1.128 d−1), R0 (57.213), and GRR (75.54) of C. punctiferalis were found on maize at 26°C, while the highest T (45.062) was found on apples. Similar results were obtained in the age-specific survival curves (sxj), fecundity (mx), maternity (lxmx), and reproductive value (vxj) of YPM on different host plants when exposed to 20°C. These findings highlight the need for further research into the complex interactions between temperature, diet, and insect life history traits to develop effective pest management strategies and enhance our understanding of insect ecology in agroecosystems.

In Saudi Arabia, adolescent health is suboptimal; among those aged 15-29 years, 79% have insufficient levels of physical activity levels, 30% are living with overweight or obesity, and 10% of them have pre-diabetes(1).

The Saudi Guidelines for the Prevention and Management of Obesity recommend implementing school-based interventions to prevent obesity among adolescents(2). Understanding the school setting through a school-based environmental audit can provide insight into the barriers and enablers of obesity prevention strategies in schools (3), which can inform the design of schoolbased interventions. One such tool, the International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE) tool, assesses the school environment in relation to healthy eating (HE) and physical activity (PA). The reliability and feasibility of this tool has been tested across 256 schools in 12 different countries. Therefore, the ISCOLE tool can be used to conduct reliable environmental audits across international school settings(3). The ISCOLE tool(3) was used along with the Saudi Ministry of Education (MOE) canteen policy checklist to examine the school environment in relation to HE and PA.

The Saudi MOE canteen policy is a checklist of banned and recommended food and drink items sold to students. Three female high schools were selected from differing economic deprivation levels (high, medium, and low deprivation) in Riyadh, Saudi Arabia. The ISCOLE tool covers the domains of HE and PA provisions, school facilities and policies, and was completed by the researcher in conjunction with a senior school staff member. The researcher accessed the school canteens and examined the items present. Checklists were completed and pictures taken for documentation. Ethical approval was granted from the Saudi MOE, Princess Noura University’s Institutional Review Board, and affirmed by Queen’s University Belfast.

There were notable differences between the three high schools sampled. Middle and low deprivation schools had PA and HE policies under development, a specific time allocated for PA, HE promotion and a school shop; the high deprivation school did not have any of these. The results of the MOE canteen checklist illustrated that many ‘banned’ food items were available in the middle and low deprivation schools, including nectar juices, pre-packaged croissants, chocolates, and popcorn. Regarding ‘recommended’ food items, both schools offered sandwiches and bottled water. None of the schools offered healthy food at subsidized prices and only the low deprivation school had access to a small outdoor soccer area.

In Saudi Arabia, female high schools face significant challenges regarding a school environment that supports both HE and PA. These challenges include the absence of HE provision and lack of suitable PA facilities. Understanding the school context will help support the development of a future school-based obesity prevention intervention.

Three-dimensional vortex dynamics around two pitching foils arranged in side-by-side (parallel) configurations is numerically examined at a range of separation (gap) distances ($0.5c \leqslant y^* \leqslant 1.5c$). In-phase ($\phi =0$) and out-of-phase ($\phi ={\rm \pi}$) motions are considered for Strouhal numbers of $0.3$ and $0.5$ at a Reynolds number of $8000$. In this work, we show that the foil proximity effect, defined as the influence of one foil on the flow characteristics around the other, induces a spanwise instability in the braids of trailing-edge vortices (TEVs) during their roll-up. This is a newly identified instability that manifests itself in the form of secondary vortical structures with opposite circulation compared with the TEVs formed on the foils, which leads to the formation of double necking on the braids of the TEVs. We provide quantitative evidence linking the formation of these secondary structures to the braid instability. The first neck merges with the TEV, while the second neck detaches from the braid region and moves downstream independently. As the foil proximity effect intensifies (spacing between the foils decreases), secondary vortical structures, as well as the necks, become more prominent, leading to the emergence of three-dimensional wake features. Lastly, the influence of kinematics of the foils on three-dimensionality of the wake is investigated. At higher Strouhal numbers, broader regions of high strain are developed near the trailing edge, associated with the detachment of stronger structures from the braids of TEVs. The characterized instability demonstrates consistent properties for in-phase and out-of-phase motions, albeit with specific differences in dynamics of leading-edge vortices.

The Critically Endangered Arabian leopard Panthera pardus nimr was believed to be absent from the Nejd region in Dhofar Governorate, Oman. However, a scat confirmed by DNA analysis in 2011 and camera-trap images from 2014 confirmed the presence of the leopard in this region. During 2014–2021, our camera traps documented at least eight individual leopards, demonstrating the species is resident and breeding in the region. This finding extends the Arabian leopard's known range in Oman by c. 40 km northwards. To improve detection probability, we recommend that camera-trap surveys for the leopard in the Arabian Peninsula are of at least 18 weeks duration. We advocate the designation of central and western areas of the Nejd as a National Nature Reserve, to protect critical habitat for the Arabian leopard and for other species in this region.

Validating the theoretical work on Rayleigh–Taylor instability (RTI) through experiments with an exceptionally clean and well-characterized initial condition has been a long-standing challenge. Experiments were conducted to study the three-dimensional RTI of an SF$_6$–air interface at moderate Atwood numbers. A novel soap film technique was developed to create a discontinuous gaseous interface with controllable initial conditions. Spectrum analysis revealed that the initial perturbation of the soap film interface is half the size of an entire single-mode perturbation. The correlation between the initial interface perturbation and Atwood numbers was determined. Due to the steep and highly curved feature of the initial soap film interface, the early-time evolution of RTI exhibits significant nonlinearity. In the quasi-steady regime, various potential flow models accurately predict the late-time bubble velocities by considering the channel width as the perturbation wavelength. Differently, the late-time spike velocities are described by these potential flow models using the wavelength of the entire single-mode perturbation. These findings indicate that the bubble evolution is influenced primarily by the spatial constraint imposed by walls, while the spike evolution is influenced mainly by the initial curvature of the spike tip. Consequently, a recent potential flow model was adopted to describe the time-varying amplitude growth induced by RTI. Furthermore, the self-similar growth factors for bubbles and spikes were determined from experiments and compared with existing studies, revealing that a large amplitude in the initial soap film interface promotes the spike development.