Large Number Of Islands Research Articles

To study island China

As greater attention has been paid to island research in China, interactions between Chinese and international island scholars have increased. However, research has tended to take an ‘islands of China’ approach, which perceives China as a continental country surrounded by a large number of islands. The present paper proposes an alternative ‘island China’ perspective, informed by selected Chinese traditions of thinking about islands and the sea, that captures the role islands have played and continue to play in Chinese culture. Drawing upon Fei Xiaotong’s reflexive concept of ‘cultural self-consciousness’, we consider the cultural history of island China, including conceptual tensions between the binaries of continent/island and center/periphery, conceptions of land dwellers and water dwellers, the role of islands as hubs of cultural transmission, and the formation of maritime societies across East and Southeast Asia. We also argue that this cultural history ought to influence island governance in China today.

Conditions of Mainland China’s Island Ecosystems and Associated Influencing Factors: Integrated Assessment of 42 Typical Island Ecosystems

Although China possesses a large number of islands, knowledge of their overall ecological condition is limited on a national scale. Accordingly, this study developed a comprehensive and quantitative island ecosystem assessment framework that incorporates environmental quality, biological structure, and landscape patterns. The framework was applied to 42 typical, representative islands within China’s coastal regions, including different climatic zones, area sizes, populations, and substratum lithologies. Results showed that the value range of the comprehensive index of island ecosystem condition (CIisland) was significant (from 52.33 to 89.53, 71.72 average), and 85.4% of islands scored either “high” or “good,” indicative of their exceptional condition. However, conditions varied among different island components, indicating different challenges. Environmental quality index (Ienv) values ranged from 60.70 to 94.80 (79.72 average), where primary threats were seawater nutrient pollution, petroleum, and marine organism metal contamination. Biological structure index (Ibio) values ranged from 43.50 to 89.40 (66.10 average), where primary threats were vegetation destruction and a reduction in marine biodiversity within intertidal and subtidal zones. Landscape pattern index (Iland) values varied significantly (from 6 to 100, 72.36 average), where a key characteristic of highly developed islands was low natural landscape (vegetation) coverage. Conditions also varied among island climate zones, lithologies, area sizes, and levels of human habitation. Additionally, island ecosystem conditions were influenced by both natural and anthropogenic factors as well as area size, population, and GDP. Although distance to the mainland significantly correlated to (Ibio), and (CIisland), these parameters did not significantly correlate to (Ienv), which might be explained by that environmental quality was generally conditional on large-scale environments. This assessment is intended to provide a holistic perspective on island conditions in China while identifying key challenges and associated driving factors, which will greatly aid in establishing island-specific sustainable management practices.

Preference of Methods and Media for Promotion of Drug Abuse Prevention According to the Point of View of Students and Parents in Bima

Background: Drug abuse in the Bima region increases from year to year, and it is dominated by students. In 2017 there were 44 cases handled, increased to 79 cases in 2018, and 71 cases in 2019. Bima region as a port city that connects Sumbawa island with a number of large islands in Indonesia has become a risk factor for illicit drug trafficking. Socialization on the dangers of drug abuse that has been carried out in the school environment has a number of limitations, especially in terms of time, methods, and media as well as the number of target audiences that are covered by the activity. It is necessary to develop a method and media approach that is appropriate to the developmental characteristics of adolescents. Objectives: This study aims to obtain an overview of the need for methods and media for the promotion of drug abuse prevention from the point of view of students and parents in Bima. Methods: This research was conducted through a survey method. It was carried out in six Junior High Schools (SMP) in Bima from May to October 2021. Research variables consisted of demographic characteristics; the history of drug and substance use by students; and the need for prevention of drug abuse based on methods, media, locations, frequency, and information providers in Bima. Research data were collected using a questionnaire instrument. Population of this research was students and their parents. The sample size was determined based on the Slovin formula. Data were obtained from 275 students and 70 students' parents. Research data analysis was done with univariate statistics. Results: Students and parents need drug abuse prevention promotion activities that are implemented by health workers either directly or through audiovisual media and social media, such as film screenings on television and gadgets. The promotion is conducted on a scheduled 2-3 times a year. Most of the respondents chose the school and house for the promotion activities. Conclusion: Students and parents had the same interests and opinions about the need for methods and media to promote drug abuse prevention. The results of this research are expected to be a recommendation for the development of a promotion program for the prevention of adolescent drug abuse in Bima.

Trophic ecology of cats (Felis catus) in montaña de Guaza: implications for the conservation of the critically endangered giant lizard of Tenerife (Gallotia intermedia)

Cats have accompanied humans since they were domesticated, spreading and settling in a large number of islands where they modify environments and prey on native species. In the Canary Islands, several studies have shown that cat’s prey on native species, including Critically Endangered species such as the giant lizards of Tenerife (Gallotia intermedia), La Gomera (G. bravoana) and El Hierro (G. simonyi). This study focuses on the trophic ecology of the cat in Montaña de Guaza, where a population of the giant lizard of Tenerife is located. The current results show important changes in the diet of this alien species at this area in relation to the obtained by others author in 2004. The main changes detected are the low level of consumption of mammals and the high levels of birds and lizards. These changes seem to be a direct consequence of a low density of rabbit (Oryctolagus cuniculus), the main prey at the different habitats of Canary Islands, probably due to the rabbit hemorrhagic disease virus (RHDV) incidence. The high consumption of reptiles detected in this study could explain the reduction of both distribution area and number of giant lizards at this locality.

Contract Optimization of Renewable Energy Electricity Supply Chain on the Island for Sustainability

In China, a large number of islands with power demand have not developed renewable energy, and their power supply has long been dependent on fossil fuels. In this paper, the author assumes that the supply and demand for electricity are uncertain, and consider an island electricity supply chain consisting of a single intermittent renewable plant and a single electricity sales company (ESC) and introduce Stackelberg game theory into it. In this case, the author studies how to improve the power supply efficiency and promote the development of renewable energy under the main power generation way of renewable energy, also analyzes the influence of different parameters on the decision-making of supply chain participants. Through comparative analysis, it can be found that the efficiency of supply chain and the development of renewable energy resources are significantly improved after the introduction of revenue sharing contract and revenue and risk sharing contract, and the effect of the latter contract is more obvious. Furthermore, the research shows that to maintain high levels of installed capacity in renewable energy, the efficiency of electricity generation equipment is not always the higher the better. And the research also reminds governments to take full account of the contractual environment of the electricity supply chain when subsidizing renewable energy.

The island biogeography of the eBird citizen‐science programme

AbstractAimIsland biotas face an array of unique challenges under global change. Monitoring and research efforts, however, have been hindered by the large number of islands, their broad distribution and geographical isolation. Global citizen‐science initiatives have the potential to address these deficiencies. Here, we determine how the eBird citizen‐science programme is currently sampling island bird assemblages annually and how these patterns are developing over time.LocationGlobal.TaxaBirds.MethodsWe compiled occurrence information of non‐marine bird species across the world's islands (n = 21,813) over an 18‐year period (2002–2019) from eBird. We estimated annual survey completeness and species richness across islands, which we examined in relation to six geographical and four climatic features.ResultseBird contained bird occurrence information for ca. 20% of the world's islands (n = 4,205) with ca. 8% classified as well surveyed annually (n = 1,644). eBird participants tended to survey larger islands that were more distant from the mainland. These islands had lower proximity to other islands and contained a broader range of elevations. Temperature, precipitation and temperature seasonality were at intermediate levels. Precipitation seasonality was at low and intermediate levels. Islands located between 10 and 60° N latitude and 20 and 40° S latitude were overrepresented, and islands located in Southeast Asia were underrepresented. From 2002 to 2019, the number of islands surveyed annually increased by ca. 96.4 islands/year. During this period, island size decreased, distance from mainland did not change, proximity to other islands increased and elevation range decreased.Main conclusionsThe eBird programme tends to survey larger islands containing intermediate climates that are more isolated from the mainland and other islands. These findings provide a framework to support the informed application of the eBird database in avian island biogeography. Our findings emphasize citizen science as an empirical resource to support long‐term ecological research, conservation and monitoring efforts across remote regions of the globe.

What makes an island a suitable refuge for an endemic lizard?

AbstractAimTo identify and evaluate the environmental properties of the Mediterranean islands that make them a suitable habitat for their endemic lizards. This would represent an important improvement in our knowledge and would assist the conservation of these lizards, which are threatened by both the expansion of mainland species and the increasing intensity of human disturbance on these islands.LocationMediterranean Basin.MethodsI assessed the environmental associations of 50 species of lizard (19 endemic) across 552 Mediterranean islands using outlying mean index analysis. The strength of the species responses was assessed using binomial generalized linear models.ResultsThe presence of endemic species is positively correlated with the distance of the island from the mainland. Island connectivity is also positively correlated with an increased presence of endemic lizards, but not with an increased presence of mainland species (i.e. those with exclusive or mainly continental natural distribution). In addition, island size, temperature and vegetation productivity are positively correlated with the presence of mainland species. Outlying mean index (OMI) analysis showed that the endemic species occupy niche positions that are similar to the average environmental conditions in the archipelago, but frequently without using the entire range of niches. The mainland species usually occur in more peripheral positions in the environmental space, except for some highly expansive species.ConclusionsLizards that are endemic to the Mediterranean islands were found to be present on a large number of islands within an archipelago, but they quickly disappear as the conditions change, largely because of human activity. Large islands act as population reservoirs for mainland species, facilitating secondary colonization of peripheral islets.

Development of Island Leisure Sports Tourism Based on SWOT

Fu, W. and Liang, L., 2020. Development of island leisure sports tourism based on SWOT. In: Qiu, Y.; Zhu, H., and Fang, X. (eds.), Current Advancements in Marine and Coastal Research for Technological and Sociological Applications. Journal of Coastal Research, Special Issue No. 107, pp. 197-200. Coconut Creek (Florida), ISSN 0749-0208.With the increasingly rich material and cultural needs of human beings, tourism activities have gradually become a way for human beings to relax and enjoy life. The island leisure tourism has a good development prospect. The island leisure tourism, with its unique Marine landscape and unique tourism experience, has attracted thousands of tourists. There are a large number of islands in the world, most of which are uninhabited. Reasonable development and utilization of islands can greatly promote the development of island leisure tourism. Therefore, the word “island” is also an important image of island leisure tourism. However, island leisure tourism is also mysterious. The author tries to use SWOT theory to summarize and analyze the image of island leisure tourism, so as to explore the real image of island leisure tourism.

FIRST ANNOTATED CHECKLIST OF BIRDS OF JICARÓN AND JICARITA: THE SOUTHERNMOST ISLANDS OF THE REPUBLIC OF PANAMA

The Isthmus of Panama, the narrowest land bridge between North and South America, is surrounded by a large number of islands (>1500) relatively close to the mainland. However, despite the potential role Panamanian islands have for the conservation of bird species, most avian surveys are conducted on the mainland. The islands of Jicarón and Jicarita, located in Coiba National Park, are of particular interest because these are the southernmost islands in the Republic of Panama. Additionally, previous avian surveys were restricted to Coiba Island, the largest of the park, leaving the avifauna in the rest of the islands poorly known. Here, we provide the first annotated checklist of birds for the islands of Jicarón and Jicarita, where we documented 115 and 53 species, respectively. Of these 23 species represent new records for the park. Further, we documented 10 endemic subspecies and 29 migratory species, of which 7 are warblers. The most frequently observed species were Brown-backed Dove (Leptotila plumbeiceps battyi), Rufous-tailed Hummingbird (Amazilia tzacatl) and Bananaquit (Coereba flaveola). We highlight some species of interest and discuss the potential role of these islands for conservation.

Islands as refuges for surviving global catastrophes

PurposeIslands have long been discussed as refuges from global catastrophes; this paper will evaluate them systematically, discussing both the positives and negatives of islands as refuges. There are examples of isolated human communities surviving for thousands of years on places like Easter Island. Islands could provide protection against many low-level risks, notably including bio-risks. However, they are vulnerable to tsunamis, bird-transmitted diseases and other risks. This paper aims to explore how to use the advantages of islands for survival during global catastrophes.Design/methodology/approachPreliminary horizon scanning based on the application of the research principles established in the previous global catastrophic literature.FindingsThe large number of islands on Earth, and their diverse conditions, increase the chance that one of them will provide protection from a catastrophe. Additionally, this protection could be increased if an island was used as a base for a nuclear submarine refuge combined with underground bunkers and/or extremely long-term data storage. The requirements for survival on islands, their vulnerabilities and ways to mitigate and adapt to risks are explored. Several existing islands, suitable for the survival of different types of risk, timing and budgets, are examined. Islands suitable for different types of refuges and other island-like options that could also provide protection are also discussed.Originality/valueThe possible use of islands as refuges from social collapse and existential risks has not been previously examined systematically. This paper contributes to the expanding research on survival scenarios.

Transportation Limitation Access to the Small Islands (Case Study: Banggai Laut Regency)

Indonesia is as an archipelago and maritime country, the large number of Islands owned and scattered in all directions makes a challenge for the Government in equitable development. Development in Indonesia has not been spread evenly and tends to focus on the big island, while the smaller islands are still far behind and lack of government attention. One of them is the lack of infrastructure especially the access to the small islands. Among the small islands in Indonesia with minimal maritime infrastructure or transportation is Banggai Laut Regency, Central Sulawesi Province. This Regency is a new regency that separate itself from its previous regency that is Banggai Kepulauan Regency in about 4 years ago. For the development of the Banggai Laut Regency, access to reach that regency is quite difficult. Therefore, the aim of this research is to find infrastructure development strategy to support the development of Banggai Laut Regency. The research method used was the concurrent model mixed method. Data collection method was done with primary data through field observation and interview, secondary data through literature and document review. Analytical techniques used are qualitative descriptive and Map Overlay techniques using GIS to describe the characteristics of study areas and spatial relationships between islands. The results of this research conclude that the Banggai Laut Regency requires infrastructure development particularly maritime transportation to enhance accessibility of the community headed to Banggi Laut Regency or headed to another island from the Banggai Laut Regency.

Marine uses, synergies and conflicts. Evidence from Crete Island, Greece

Coastal zones and marine areas attract a large number of people and productive activities, a fact that causes important pressures on ecosystems and affects the cohesion of local societies. These areas – that is, the large number of islands and the extended coastline - are important for Greece, because of its geography. Coastal zones and marine areas are vulnerable socio-spatial systems exposed to menaces, such as: sea level rising, desertification phenomenon, built-up areas excessive expansion etc., thus, spatial planning is required for their sustainable management, something that is not always easy to implement. The paper aims to discuss key issues of spatial planning emerged from the ratification of an integrated framework for marine planning in the national spatial planning system. For better understanding of the particularities of Greek spatial planning procedures, the island of Crete is chosen as a case study area, where synergies, conflicts and methodological issues come up at regional and local level.

Study of Slurry Configuration and Circulation Issue of Large Diameter Bored Pile at Sea

The large diameter bored pile has the advantage of large bearing capacity, large rigidity, highly construction speed as well as saving cost, of which many large bridges have adopted to basically meet the foundation construction of deep water. China’s coastline extends for about 18,000 kilometers, and covers a large area of the sea area with a large number of islands inshore. The cross-sea bridge has become the basic form to connect the islands and land. Therefore, the large diameter bored pile could be widely use in the future. Because of the construction particularity at the sea, like the changeable maritime climate, hurricane wave, tidal variation and the characteristics of the sea water will bring the risk to construction and increase the construction difficulty. Thus there are a lot of technology problems to be solved, It is necessary to go in deep study because the slurry is the most crucial step of the bored pile which will influence most of the construction quality. This paper combines the example of Jiuzhou Channel Bridge of the Hong Kong-Zhuhai-Macau Bridge to discuss the Slurry Configuration and Circulation Issue of the large diameter bored pile at the sea, and to offer the proportion of the slurry yield and fresh water mud, and also studies the circulation system of slurry, which used the Cyclone slag separator to separate the slurry, and achieved the expected effect, thus provides the available experience to the later construction.

High-resolution wave model validation over the Greek maritime areas

Abstract. The increasing maritime activity can be seriously affected by severe weather and sea conditions. To avoid serious damages to ships, marine structures and humans, a good weather and wave forecast is of primary importance. In general the meteorological and the wave models are used to produce forecasts at large scale like the global or the medium-size inner seas. For much smaller environments like the Greek maritime areas, characterized by complicated features like the orography and the presence of islands, the modelisation becomes a not simple task. This study is devoted to the validation of the performance of the WAM wave model over the Ionian and Aegean Seas. The period of validation refers to the first 12 months of operational use of the model at the National Observatory of Athens. The wave model is applied at a resolution of 1/16 degrees and is driven by the 10 m wind, produced by the BOLAM meteorological model operationally run over the same area. Two different sources of data have been used for the verification of the model results. The first dataset is provided by a network of buoys deployed over the Greek maritime areas and the second consists of altimeter data, provided by the OSTM/Jason-2 satellite platform. Although the study area is characterized by complex topography and a large number of islands, the implementation of the WAM model provides very encouraging results. In general, with the exception of the two buoys located in the Ionian Sea, the WAM model tends to underestimate the wave energy in the region of the Aegean Sea. The comparison with the altimeter data shows that the model has a tendency to overestimate the height for waves lower than 2.5 m and to underestimate the waves higher than 3 m.

Disks Controlling Chaos in a 3D Dynamical Model for Elliptical Galaxies

AbstractA 3D dynamical model with a quasi-homogeneous core and a disk component is used for the chaos control in the central parts of elliptical galaxy. Numerical experiments in the 2D system show a very complicated phase plane with a large chaotic sea, considerable sticky layers and a large number of islands, produced by secondary resonances. When the mass of the disk increases, the chaotic regions decrease gradually, and, finally, a new phase plane with only regular orbits appears. This evolution indicates that disks in elliptical galaxies can act as the chaos controllers. Starting from the results obtained in the 2D system, we locate the regions in the phase space of the 3D system, producing regular and chaotic orbits. For this we introduce and use a new dynamical parameter, the S(w) spectrum, which proves to be useful as a fast indicator and allows us to distinguish the regular motion from chaos in the 3D potentials. Other methods for detecting chaos are also discussed.

RITUS KEMATIAN MASYARAKAT JAWA KUNA, BALI KUNA, DAN BALI SEKARANG

Indonesia has various tribes that spread over a large number of islands, and each has their own custom or tradition which is unique and different from each other. One of the customs or traditions is the funeral ceremony which can be found among Javanese and Balinese people, that is a ceremony held when someone is passed away. Based from the old inscriptions and manuscript funeral ceremony has already rooted in the past. They have their own terminology about the ceremony, although the ceremony itself principally has the same purposes. Compared to similar ceremony still undergoes until the present time, it is assumed that the custom or tradition is inherited for generations.

Stability and instability in the anisotropic Kepler problem

We study the degree of order and chaos in the anisotropic Kepler problem. The Lyapunov characteristic number (LCN) is constant for all orbits in the chaotic domain with a fixed mass ratio µ. It increases from zero as the mass ratio µ increases from µ = 1, reaches a maximum for µ = 4 and then decreases slowly to zero for a very large µ. We found the characteristics of many families of the periodic orbits of multiplicities up to 17. Several families have a stable part for µ close to µ = 1 (namely, µ < 1.748). We conjecture that there are stable orbits of high multiplicities for larger values of µ. The stable orbits are surrounded by islands of stability consisting of closed invariant curves. The rotation number along these invariant curves decreases from the periodic orbits outwards. Higher-order islands are enclosed in every main island around a low-order periodic orbit. In the case µ = 1.1, we find a large number of islands of multiplicities from 3 up to 17. Then we calculate the asymptotic curves from unstable periodic orbits. These curves go through the collision orbits but continue beyond these points. The intersections of the stable and unstable asymptotic curves are homoclinic and heteroclinic points. The corresponding orbits are the main characteristics of chaos.

Numerical Calculation of Flows and Long-Range Transport of Contaminants in Lowland River Reservoirs

Flows and contaminant transport in the Novosibirsk reservoir are calculated on the basis of a two-dimensional (plane) nonstationary model with Saint Venant's equations. The model allows for the presence of a large number of islands. Coefficients of horizontal exchange (dispersion) are calculated by the formula taking into account dynamic velocity at the bottom. Numerical implementation of the model employs a semi-implicit conservative finite-difference TVD scheme on a distributed grid and procedures allowing for the flow past these islands. Model examples of calculations and computation results for dynamics of long-range transport of contaminants along the Novosibirsk reservoir are given.

On the use of the micromarker technique for studying the growth mechanism of thin oxide films

The high temperature behavior of microscopic markers, deposited on to pure and ceria-coated nickel, was tested. The markers, having a form of 20-nm-thick palladium bumps with a fractional surface coverage of 0.05 and 30-nm thick gold bumps with a surface coverage of 0.25, apparently interfered with the oxide growth, increasing the oxidation rate on their surface at 973 K over one order of magnitude. As detected by a combination of Auger electron spectroscopy and Rutherford backscattering spectrometry, for ceria modified nickel, the markers’ depth-position coincided with the ceria particles dispersed in the vicinity of the oxide–gas interface. For pure nickel oxide films, the markers were easily incorporated into the growing oxide during very early stages of oxidation and were difficult to detect at the oxide–metal interface. It is proposed that the catalytic behavior of the markers was caused by their fragmentation into a large number of islands, leading to the refinement of the oxide grains, which in turn accelerated the substrate oxidation rate. Some precautions necessary in conducting the marker experiments are defined.

Electronic coupling and structural ordering of quantum dots using InAs quantum dot columns

In this article, recent investigations of vertically aligned quantum dot columns conducted at Stanford University are reviewed. The quantum dots are InAs in a matrix of GaAs. Both the quantum dots and quantum dot columns are formed through strain-induced islanding, without lithography. Two aspects of these columns are discussed. First, the electronic coupling of quantum dots within columns of up to ten quantum dots is demonstrated. The coupling is adjusted and improvements to a simple light-emitting diode are shown. Second, increased uniformity of a surface quantum dot layer is shown when a subsurface layer of these columns are used. The most impressive results occur when the columns contain a large number of islands. Reduced variations in average ensemble height and diameter, called size uniformity, and average nearest neighbor distances, called structural uniformity, are shown. A surface unit cell of islands is demonstrated and the lack of a surface lattice is discussed.