Journal articles on the topic 'Multidimensional spring system'

Schizophrenia is a serious mental disease whose pathogenesis has not been fully elucidated. Its clinical evaluation and diagnosis still highly depend on the clinical experience of doctors. It is of great scientific value and clinical significance to study the inducing factors and neuropathological mechanism of schizophrenia. Based on the four research problems of schizophrenia, this paper analyzes the data types that need to be stored in clinical trials and scientific research, including basic information, case report data, neuropsychological and cognitive function evaluation, magnetic resonance data, electroencephalogram (EEG) data, and intestinal flora data. Through the demand analysis of the system, including the data management part, data analysis part, the functional demand of the system management part, and the overall nonfunctional demand of the system, the overall architecture design, functional module division, and database table structure design of the system are completed. Adopting Browser/Server (B/S) architecture and front-end and back-end separation mode and applying Java and Python programming language, based on spring framework and database, a multidimensional information management system for schizophrenia is designed and implemented, which includes four modules: data analysis, data management, system management, and security control. In addition, each functional module of the system is designed and implemented in detail, and the software operation flow of each module is illustrated with the sequence diagram. Finally, the multidimensional data of schizophrenia collected in our laboratory were used for system test to verify whether the system can meet the needs of clinical big data management of schizophrenia and the multidimensional information management system of schizophrenia can meet the needs of clinical big data management. The information management system helps schizophrenic researchers to carry out data management and data analysis. It also has advantages that are easy to use, safe, and efficient and has strong scalability in data management, data analysis, and scalability. It reflects the innovation of the system and provides a good platform for the management, research, and analysis of clinical big data of schizophrenia.

The seismic response of a single-layer spherical lattice shell controlled by restorable sliding isolator is studied under different seismic excitations. The isolation system consists of flat steel-Teflon sliding isolators and superelastic SMA spring restrainers. The NiTi-SMA is used to fabricate helical spring for recentering control of the isolation system. In the first step of this investigation, the configuration scheme and functioning mechanism of a novel SMA spring restrainer are introduced briefly. Then, realistic mechanical behavior of large-scale superelastic NiTi helical spring is studied through a set of cyclic experimental tests. According to the obtained hysteresis loops, a mechanical model combining multilinear model and hysteresis model is developed to simulate the overall response of the SMA-based seismic restrainer. Besides, the sliding isolator is evaluated using a bilinear force-displacement hysteresis model. Finally, a 60 m span single-layer spherical lattice shell with substructure is modeled with finite element program. Nonlinear time history analyses of the controlled and uncontrolled lattice shell are performed considering multidimensional seismic inputs. The study shows that the seismic response of the controlled lattice shell can be effectively reduced by using isolation and control devices. Furthermore, the seismic response of the isolation system such as peak displacement and residual displacement can be effectively controlled by using the developed SMA spring restrainers.

For vehicle-bridge system, structural uncertainties, especially the interval variables with correlation, have a great influence on dynamic response. Therefore, this paper proposes an effective uncertainty analysis method for vehicle-bridge system based on multidimensional parallelepiped (MP) model, which can reasonably deal with the correlation of interval variables. First, the vehicle-bridge system is simplified as a four degrees-of-freedom mass-spring vehicle model running on a simply supported beam. MP model is adopted to describe the uncertainties of all the interval variables. Second, via affine coordinate system transform, the interval variables with correlation are transformed as the independent variables, which is very convenient for uncertainty analysis. Finally, the uncertain dynamic response is approximated through the first-order Taylor interval expansion, and the upper and lower bounds can be calculated using the dynamic response at midpoints and the partial difference multiplied by interval radius. Because the correlation is sufficiently considered, the uncertainty analysis results on vehicle–bridge interaction system will be much more accurate than the traditional interval analysis method (IAM). Numerical example demonstrates the correctness and effectiveness of the proposed method.

In this paper, through data analysis of multimodal knowledge graph optimized neural network and visual analysis of college students’ sports performance, we use huge graph, a graph database supporting distributed storage, to store domain knowledge in the form of the knowledge graph, use Spring Boot to build a server-side framework, use Vue framework combined with vis.js to visualize relational network graphs, and design and implement a knowledge-oriented. This paper proposes a visual analytics system based on the theory of visual analytics. Based on the idea of visual analytics, this paper presents a visual analytics framework combining predictive models. This framework combines the automated analysis capability of predictive models with interactive visualization as a new idea to explore the visual analysis of student behavior and performance changes. Using relevant predictive algorithms in machine learning, corresponding models are built to refine the importance of features for visual analysis and correlate behavioral data with achievement data. In this process, multiple prediction algorithms are used to build prediction models. The model effects are analyzed and compared to select the optimal model for use in the visual analytics framework. The graphical analytic view is integrated. EduRedar, an optical analytical system for sports data based on the performance prediction model, is designed and implemented to support multidimensional and multiangle data analysis and visualize the changes in college students’ sports and performance based on accurate campus exercise data.

Assessment of resource partitioning in pollinators at a particular place can be used to conserve plant communities by minimizing their inter-specific competition. Current study was conducted to investigate the occurrence of this phenomenon among plant communities under sub-tropical conditions for the first time in Pakistan. We considered the entire available flowering plant and floral visitor communities in the study area—Lal Suhanra forest of Bahawalpur, Pakistan- along with different variations among them based on morphology, color and symmetry (functional groups) i.e. four functional groups among insects and nine among plants. Weekly floral visitor censuses were conducted during spring season -from the first week of March to the fourth week of May 2018. Thirty individuals of each plant species -in bloom- were observed for floral visitors in each census. Plant species with different floral shapes, colors and symmetry did not show any significant resource partitioning. The Non-metric multidimensional scaling analysis followed by one-way ANOSIM test showed non- significant differences among all the pair of floral shapes, colors (except white and yellow) and symmetry (R-value < 0.168). However, SIMPER test suggested that flies were the most common group that contributed more towards within group similarities of different floral shapes (19 to 21% similarity), colors (16 to 30%) and symmetry (19%) followed by long-tongue bees i.e. 14 to 21%, 9 to 19% and 18%, respectively. Our results suggest that plant communities under sub-tropical conditions of Pakistan exhibit a generalist pollination system with no significant resource partitioning in pollinator species. Therefore, plant communities may have high competition for pollinator species which exhibits fewer implications of species loss on overall pollination process. Our study provides the basis for understanding the partitioning of pollinator guilds under sub-tropical conditions. Future studies should focus on functional traits in more detail at the community and the population scales for their possible impact on resource partitioning.

This study assessed differences in agility performance between athletes of team and individual sports by assessing change-of-direction speed (CODS) as pre-planned agility and reactive agility (RA) as non-planed in different spatial configurations. The study involved 36 individual (sprint, hurdles, jumping, tennis, and judo) and 34 team (soccer, basketball, and handball) athletes. CODS and RA were measured with a light-based reactive training system in a frontal (FR), universal (UN), semicircular (SC), and lateral (LA) design. Lower limb power and sprint performance were also measured in a 10 m single leg jump test and 15 m sprint. Individual athletes showed significantly better performance in three of the eight agility tests: LA-RA, UN-RA, and SC-CODS (p < 0.008, p < 0.036, and p < 0.027, respectively) and were found to present stronger correlations (p < 0.01) between jump test performance and the CODS condition. Team athletes showed stronger associations between sprint performance and the CODS condition. In the RA condition both jump and sprint performance showed stronger correlations in the group of individual athletes. Agility performance as measured by CODS and RA should improve with enhanced of motor proficiency. Finally, the tests applied in this experiment seem to be multidimensional, but require spatio-temporal adjustment for their implementation, so that they meet the requirements of the particular sport.

In recent decades, global and local vegetation phenology has undergone significant changes due to the combination of climate change and human activities. Current researches have revealed the temporal and spatial distribution of vegetation phenology in large scale by using remote sensing data. However, researches on spatiotemporal differentiation of remote sensing phenology and its changes are limited which involves high-dimensional data processing and analysing. A new data model based on data cube technologies was proposed in the paper to efficiently organize remote sensing phenology and related reanalysis data in different scales. The multidimensional aggregation functions in the data cube promote the rapid discovery of the spatiotemporal differentiation of phenology. The exploratory analysis methods were extended to the data cube to mine the change characteristics of the long-term phenology and its influencing factors. Based on this method, the case study explored that the spring phenology of Qinba Mountains has a strong dependence on the topography, and the temperature plays a leading role in the vegetation green-up date distribution of the high-altitude areas while human activities dominate the low-altitude areas. The response of green-up trend slope seems to be the most sensitive at an altitude of about 2000 meters. This research provided a new approach for analysing phenology phenomena and its changes in Qinba Mountains that had the same reference value for other regional phenology studies.

Intercropping plays an essential role in agricultural production, impacting the soil’s physical and chemical properties and microbial communities. However, the responses of ammonia-oxidizing microorganisms in the continuous-cropping soil to different intercropping systems in different growing seasons are still insufficiently studied. Here, we investigated the effects of seven intercropping systems (alfalfa (Medicago sativa L.)/cucumber, trifolium (Trifolium repens L.)/cucumber, wheat (Triticum aestivum L.)/cucumber, rye (Secale cereale L.)/cucumber, chrysanthemum (Chrysanthemum coronrium L.)/cucumber, rape (Brassica campestris L.)/cucumber, mustard (Brassica juncea L.)/cucumber) on soil physical and chemical properties, potential nitrification rate (PNR), soil ammonia-oxidizing archaea (AOA), and ammonia-oxidizing bacteria (AOB) communities in the greenhouse in spring and autumn. The results showed that, compared with cucumber monoculture, intercropping increased the soil NH4+-N and NO3−-N. The chrysanthemum–cucumber, rape–cucumber, and mustard–cucumber treatments increased soil PNR. Intercropping increased the AOA and AOB abundances in two seasons, especially in rape–cucumber, wheat–cucumber, chrysanthemum–cucumber, and trifolium–cucumber treatments. The ratio of AOA and AOB decreased with seasonal variation. The wheat–cucumber and rape–cucumber treatments increased soil AOA community diversity. Seasonal variation had a significant effect on the relative abundance of the AOB community. Nonmetric multidimensional scaling analysis showed that the AOA and AOB community structures were obviously different from spring to autumn. Redundancy analysis showed that the AOA community was significantly regulated by moisture, NO3−–N, and available potassium (AK), while the AOB community was significantly regulated by moisture, available phosphorus (AP), AK, NO3−-N, and pH. Network analysis showed that the co-occurrence relationship and complexity of AOA and AOB communities were different in two growing seasons. The AOB community may play a critical role in ammonia oxidation in autumn. Taken together, intercropping improved soil physicochemical state, increased soil PNR and significantly altered soil AOA and AOB communities. Seasonal variation significantly altered the AOA and AOB communities’ structure and interaction between them. The effect of seasonal variation on AOA and AOB communities was greater than intercropping.

According to River Continuum Concept (RCC), channel morphology, including sediment loads and channel width, river habitat, flow regimes and water quality, differs from the tributary to the downstream river’s mainstem, allowing shifts in faunal composition from dominance of shredders to collectors downstream, respectively. Tributaries are responsible for contributing organic carbons, nutrients and water. However, such knowledge is still limited in the monsoon-dominated river systems of the Himalaya. The study was conducted in the river’s mainstem and tributaries of the Karnali River Basin, which are glacier and spring-fed river systems, respectively, in the western Himalaya, Nepal. A total of 38 river stretches in the river’s mainstem and tributaries were sampled during post-monsoon and pre-monsoon seasons in the years 2018 and 2019. Water quality parameters, such as pH, temperature, electrical conductivity, total dissolved solids, dissolved oxygen, alkalinity and hardness, and the benthic macroinvertebrates were studied. Ten subsamples of benthic macroinvertebrates were collected following the multi-habitat sampling approach at each site. High taxa richness was recorded in tributaries compared to the river’s mainstem while abundance was similar between river types. Non-metric multidimensional scaling (NMDS) formed two distinct groups, reflecting high similarities in benthic macroinvertebrate composition within the tributaries and river’s mainstem rather than between river types. Redundancy analysis (RDA) indicated water temperature and pH as major environmental predictors for benthic macroinvertebrate variability between river types. Therefore, river type-based conservation efforts that account for upstream–downstream linkages of aquatic biota and resources in freshwater ecosystems can ensure the ecological integrity of the whole river basin.

This updated issue of the professional publication Bulletin of the Slovenian Armed Forces is dedicated to the question of the Slovenian commitment to finding peaceful solutions to conflicts. As Commander­in­Chief of the Defence Forces of the Republic of Slovenia, I find this subject not only necessary but also entirely essential. There are many reasons for this. The historical experience of the Slovenian people has not always been pleasant regarding the preservation of national identity, manifested in the language as well as in the cultural and national tradition. Despite different repressive and denationalising measures taken by many foreign authorities, our ancestors managed to preserve the Slovenian nation through much wisdom, deep national awareness and political skill. The importance of consistent compliance with the provisions of international law in crisis situations, including wars, was seen in 1991. Slovenia won the war, not only in a military sense but also by complying with all legal norms, thus soon becoming recognised as a young European democratic country founded on high legal and moral principles. The lessons of war in 1991 increased the resolve of the Slovenian people for clear rejection of the use of force in finding solutions to any kind of conflict. For this reason, my pleasure at being invited to write about the topic of Slovenian people in the service of peace is that much greater, in part also due to the fact that I spent a large part of my professional life, from 1992 to 2005, working in the United Nations, first as the ambassador of the Republic of Slovenia, later as UN Assistant Secretary­General. In both functions I dealt with peacekeeping operations to a considerable extent. United Nations peacekeeping operations were in full swing at that time and underwent great development on the one hand, but also bitter disappointment and moments of deep doubt on the other. However, they continued to develop to the current extent. The topic of the Bulletin is presented in truly deep, scientific, theoretical and practical ways, from strategic and tactical levels, considering the evolutionary and transformational characteristics of peacekeeping operations, and deriving from historical experience. The most respected authors in the Slovenian professional field have thrown light upon important conceptual changes in the area of peacekeeping operations, which result from numerous factors, in particular from important geopolitical changes in the world. We must not disregard the increasing cooperation of regional organisations in the implementation of peacekeeping operations, which has indirectly brought about a different understanding of the term “peacekeeping operation” and opened technical discussions in the area of terminology as well as in the technical fulfilment of obligations, all the way to the question of the necessity of a preliminary UN mandate. These deficiencies can also be seen in Slovenia and point to the need for conducting a deep technical discussion as soon as possible and unifying the understanding of both the structure of the Slovenian Armed Forces and the broader defence and security system. The introductory and in particular the more theoretical parts of the Bulletin may be taken as important contributions in this regard. Some of the articles offer interesting historical insight into the cooperation of Slovenian men, and later women, in various endeavours for peace launched by individual great powers and international organisations. Although it is difficult to understand the military intervention of European forces on the island Crete in 1897 as a peacekeeping operation, the objective which is still in the forefront of contemporary efforts of the international community in this area was achieved for at least some time. This intervention ensured an armistice between the parties involved in the conflict and enabled a diplomatic solution on the island without unnecessary victims. The confidence that the highest political and military authorities in the Austro­Hungarian Empire had in the 2nd Battalion of the 87th Infantry Regiment from Celje was truly special. This was particularly the case because the military unit was mainly composed of Slovenes, and at the time of deployment in Crete its commander was a Slovene as well. However, we need to emphasise that such thinking is unconventional. By studying the literature on peacekeeping operations we see that such operations were first mentioned around 1919 in connection with peace conferences after the end of World War I and with managing various border issues in Europe, different plebiscites and other situations which, besides political and other diplomatic action, also required the protection of security and were followed by military operations intended for this particular purpose. History tells us much about peacekeeping operations intended to maintain truces. In these operations, coalition forces were deployed to an area in which a truce already existed and had to be maintained among well organised and disciplined armed forces. Today, the status of armed forces is quite different. We have to look at all of history and every aspect of international military engagement which is not armed combat by nature but a military presence with various aspects of employment of military force and the constant readiness and capability of peace forces to defend themselves effectively and be prepared to use weapons to fulfil their mandate. If today we see peacekeeping operations as valid in this respect, it is clear that we have to be familiar with history and evaluate what we can learn from past experience and how we are obliged to consider the present. Of course, we must consider the present. If we look at the status of peacekeeping operations today, we see how important this military activity is for the modern world. I will only dwell upon the United Nations, which from the standpoint of peacekeeping operations is the most important organisation operating today. Approximately 140,000 soldiers participate in peacekeeping operations under the auspices of the United Nations. No other military force has that number of uniformed personnel operating abroad. These people are assigned to eighteen currently active peacekeeping operations, each costing the organisation about seven billion dollars. This is the largest component of the budget of the United Nations. However, this expenditure is small in comparison to other kinds of military deployment outside the UN, to operations which are not peacekeeping operations by nature. Peacekeeping operations have become very multidimensional. The latest such operations, established in Africa (Darfur, Chad, Central African Republic), have been among the most demanding from the very beginning. We can thus conclude that peacekeeping operations are becoming increasingly more complex, which also results in a higher degree of risk. In 2007, 67 members of UN peacekeeping operations lost their lives. Looking at individual operations we see that six people died in Lebanon alone that year. Ever since peacekeeping operations have been in existence, Lebanon has been one of the most dangerous areas. Today, however, it is somewhat outside the sphere of interest. This may be due to the fact that there is a peacekeeping operation active in the area, on account of which a state of relative peace can be better maintained. Peacekeeping operations are both dangerous and multidimensional, multidimensional because they are no longer focused merely on keeping belligerent parties apart. Modern peacekeeping operations include both standard and supplemental functions. Providing a secure environment for political normalisation, humanitarian activity and development is a comprehensive task, requiring the engagement of peacekeeping forces in operations that are far from being common types of military deployment. This raises different questions about the training and competence of peacekeeping forces. We also have to ask ourselves how we can fully consider the lessons learned from previous peacekeeping operations and organise a system of command, particularly in organisations such as the United Nations, while at the same time making sure that national contingents do not lose their identity. There are thus two lines of communication, one through channels established by international organisations and the other through those established by national systems of armed forces. How to balance this and achieve efficient functioning? How to ensure the operation of different cultures, members and levels of competence in a way that facilitates the success of peacekeeping operations? These are always important questions to consider. In recent years the question of interest has pointed to the complexity of modern peacekeeping operations. Peacekeeping operations are frequently required to facilitate an environment in which elections can be conducted and assist in the establishment of a legal order and institutions to maintain that order. Both tasks are extremely demanding. The establishment of a safe environment for conducting elections in a country with poor communications, with no tradition of elections and with violence linked to every political event, is an extremely difficult task. The establishment of a legal order in areas with no such tradition or adequate infrastructure is even harder. There is often a need to include the civilian police, whose tasks in peacekeeping operations are very demanding. Civilian police have a number of other particularities besides problems connected to the aforementioned multidimensionality. It is necessary to adapt to the local environment in order to facilitate effective police performance. How to facilitate this in an environment such as Haiti, for example, with its difficult past? How to facilitate this in linguistically demanding environments such as East Timor until recently and in other difficult circumstances? These are all extremely demanding tasks. However, there is not much understanding with regard to all the details and problems arising from their implementation. The international political community is often satisfied merely by defining the mandate of a peacekeeping operation. For many people this signifies the solution to the problem, considering that the mandate is defined and that the deployment of forces will occur. However, this is where real problem solving only begins. Only then does it become obvious what little meaning general resolutions of the United Nations Security Council and other acts by which mandates are defined have in the context of actual situations. Therefore, I am of the opinion that we have to take a detailed look at experience from the distant past as well as the present. When speaking of the civilian police we also have to consider the fully human aspects that characterise every peacekeeping operation. Once I spoke to a very experienced leader of civilian police operations about the need to send additional police officers to the mission in Kosovo in the spring, when winter is over and people become more active, which also results in a higher crime rate. He explained that this is not only a problem in the area of this mission but elsewhere in Europe. In spring, the crime rate rises everywhere. Therefore it is difficult to find police officers during this time who are willing to leave their homeland, where they are most needed, and go to a mission area which is just then facing increased needs. I mention this to broaden understanding of the fact that the deployment of peacekeeping forces, both military and civilian police, is not only a matter of mandates and military organisation, but sometimes of the purely elementary questions that accompany social development. I have already mentioned that memory of the past is a very important component of considering present peacekeeping operations. I would like to conclude with another thought. I believe the manner of organising the knowledge of peacekeeping operations is of great importance to all countries, especially those that are new to cooperating in peacekeeping operations. This knowledge cannot be gained from books written at universities, but only from monitoring and carefully analysing the previous experiences of others. It is very important that this knowledge be carefully organised, that these experiences be carefully gathered and analysed, and that a doctrine be developed gradually. This doctrine is required for a country like Slovenia, which is new at conducting peacekeeping operations, to be able to manage well and define its role in international peacekeeping operations properly. To achieve this objective, a new country must cooperate with those countries which have been conducting peacekeeping operations for a long time and therefore have a richer experience. The neighbouring Austria is known to have one of the longest and most interesting systems of experience in peacekeeping operations within the United Nations. Ever since it joined the UN, Austria has been active in numerous activities linked to peacekeeping operations. Its soldiers and the civilian police have participated in a number of peacekeeping operations. Experience gained in this way is of great value, and using this experience is necessary for successful planning of and operating in future peacekeeping operations. The future will be complicated! At one time, when the members of peacekeeping operations numbered approximately 80,000, the United Nations thought that nothing more could be done, and a larger number of members was unthinkable. Today the number of members is significantly larger, development will most likely still continue and conditions will become even more demanding. I do not wish to forecast events which have not yet taken place. However, I would like to strongly emphasise that the history of peacekeeping operations is not over yet and that the future will be full of risks and challenges. I would also again like to stress the importance of this issue of the Bulletin of the Slovenian Armed Forces, which is entering a new decade, and express my pleasure at being able to note down a few thoughts. Let me particularly emphasise that as Commander­in­Chief of the Slovenian Defence Forces I will continue to devote special attention to achievements in the area of cooperation in peacekeeping operations in the future, having a special interest in these experiences. I thank the authors of the articles of this important issue of the Bulletin for their scientific and professional contributions – and I greatly respect those who have already done important work in the name of the Republic of Slovenia with the Slovenian flag on their shoulders, with the hope that they continue to fulfil their obligations in accordance with the rules.

Endocrine disrupting contaminants are of continuing concern for potentially contributing to reproductive dysfunction in largemouth and smallmouth bass in the Chesapeake Bay watershed (CBW) and elsewhere. Exposures to atrazine (ATR) have been hypothesized to have estrogenic effects on vertebrate endocrine systems. The incidence of intersex in male smallmouth bass from some regions of CBW has been correlated with ATR concentrations in water. Fish early life stages may be particularly vulnerable to ATR exposure in agricultural areas, as a spring influx of pesticides coincides with spawning and early development. Our objectives were to investigate the effects of early life stage exposure to ATR or the model estrogen 17α-ethinylestradiol (EE2) on sexual differentiation and gene expression in gonad tissue. We exposed newly hatched largemouth bass (LMB, Micropterus salmoides) from 7 to 80 days post-spawn to nominal concentrations of 1, 10, or 100 µg ATR/L or 1 or 10 ng EE2/L and monitored histological development and transcriptomic changes in gonad tissue. We observed a nearly 100% female sex ratio in LMB exposed to EE2 at 10 ng/L, presumably due to sex reversal of males. Many gonad genes were differentially expressed between sexes. Multidimensional scaling revealed clustering by gene expression of the 1 ng EE2/L and 100 µg ATR/L-treated male fish. Some pathways responsive to EE2 exposure were not sex-specific. We observed differential expression in male gonad in LMB exposed to EE2 at 1 ng/L of several genes involved in reproductive development and function, including star, cyp11a2, ddx4 (previously vasa), wnt5b, cyp1a and samhd1. Expression of star, cyp11a2 and cyp1a in males was also responsive to ATR exposure. Overall, our results confirm that early development is a sensitive window for estrogenic endocrine disruption in LMB and are consistent with the hypothesis that ATR exposure induces some estrogenic responses in the developing gonad. However, ATR-specific and EE2-specific responses were also observed.

Identifying early signals of climate change and latent patterns of meteorological variability requires tools analyzing time series data and multidimensional measures. By focusing on air temperature and precipitation, the present study compares local-scale climate regimes at two sites in Central Italy (urban Rome and a peri-urban cropland 10 km west of Rome), using descriptive and inferential statistics on both variables and a drought index (the Standardized Precipitation Index, hereafter SPI) recorded over the last 60 years (1958–2017). The present work assumes the importance of urban-rural gradients shaping local-scale climate regimes and spatial variability, with differential impacts on individual variables depending on territorial background and intrinsic biophysical characteristics. Considering together precipitations and minimum/maximum air temperature at month and year scale, the analysis developed here illustrates two coexisting climatic trends at distinctive spatial scales: A general trend toward warming—specifically influencing temperature regimes—and a more specific pattern evidencing changes in local-scale climate regime along the urban gradient, with a more subtle impact on both precipitations and temperatures. Empirical results indicate that climate variability increased over the study period, outlining the low predictability of dry spells typical of Mediterranean climate especially in the drier season (spring/summer). On average, absolute annual differences between the two sites amounted to 70 mm (more rainfall in the peri-urban site) and 0.9 °C (higher temperature in the urban site). A similar trend toward warming was observed for air temperature in both sites. No significant trends were observed for annual and seasonal rainfalls. SPI long-term trends indicate high variability in dry spells, with more frequent (and severe) drought episodes in urban Rome. Considering together trends in temperature and precipitation, the ‘urban heat’ effect was more evident, indicating a clearer trend toward climate aridity in urban Rome. These findings support the adoption of integrated strategies for climate change adaptation and mitigation in both agricultural systems and relict natural ecosystems surrounding urban areas.

A <5 mm thick volcanic ashfall layer associated with the White River Ash (east lobe [WRAe]) originating from the eruption of Mount Churchill, Alaska (833-850 CE; 1,117–1,100 cal BP) was observed in two freeze cores obtained from Pocket Lake (62.5090°N, −114.3719°W), a small subarctic lake located within the city limits of Yellowknife, Northwest Territories, Canada. Here we analyze changes in diatom assemblages to assess impact of tephra deposition on the aquatic biota of a subarctic lake. In a well-dated core constrained by 8 radiocarbon dates, diatom counts were carried out at 1-mm intervals through an interval spanning 1 cm above and below the tephra layer with each 1 mm sub-sample represented about 2 years of deposition. Non-metric Multidimensional Scaling (NMDS) and Stratigraphically Constrained Incremental Sum of Squares (CONISS) analyses were carried out and three distinct diatom assemblages were identified throughout the interval. The lowermost “Pre-WRAe Assemblage (Pre-WRAeA)” was indicative of slightly acidic and eutrophic lacustrine conditions. Winter deposition of the tephra layer drove a subsequent diatom flora shift to the “WRAe Assemblage (WRAeA)” the following spring. The WRAeA contained elevated abundances of taxa associated with oligotrophic, nutrient depleted and slightly more alkaline lake waters. These changes were only apparent in samples within the WRAe containing interval indicating that they were short lived and only sustained for a single year of deposition. Immediately above the WRAe horizon, a third, “Post-WRAe Assemblage (Post-WRAeA)” was observed. This assemblage was initially similar to that of the Pre-WRAeA but gradually became more distinct upwards, likely due to climatic patterns independent of the WRAe event. These results suggest that lacustrine environments are sensitive to perturbations such as deposition of ash fall, but that ecological communities in subarctic systems can also have high resilience and can recover rapidly. If subsampling of the freeze cores was carried out at a more standard resolution (0.5–1 cm) these subtle diatom ecological responses to perturbation associated with the WRAe depositional event would not have been observed. This research illustrates the importance of high-resolution subsampling when studying the environmental impact of geologically “near instantaneous” events such as episodic deposition of ashfalls.

The multiple factors that define and relate service quality and customer or consumer satisfaction have served as the basis for the development of several multidimensional models that have allowed the study of this important issue. The level of research that will be used in this work is the explanatory levelbecause it is intended to evaluate the role of innovation in the design of the service quality improvement plan and its impact on customer satisfaction. As a case study, the M7D model was applied to two national banks. Among other results, national banks obtained 83.5% compliance with the M7D model, the dimensions with the best performance are customer satisfaction, organization, processes and social responsibility. While, medium-sized banks have a compliance level of 62.7% with the M7D model, the dimensions with the best performance are customer satisfaction, Social responsibility and leadership. 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Abstract The ability to deploy a planar surface to a desired convex profile with a simple actuation can enhance foldable or morphing airfoils, deployable antennae and reflectors, and other applications where a specific profile geometry is desired from a planar sheet. A model using a system of rigid links joined by torsional springs of tailorable stiffness is employed to create an approximate curved surface when two opposing tip loads are applied. A system of equations describing the shape of the surface during deployment is developed. The physical implementation of the model uses compliant torsion bars as the torsion springs. A multidimensional optimization algorithm is presented to place joints to minimize the error from the rigid-link approximation and account for additional manufacturing and stress considerations in the torsion bars. A proof is presented to show that equal torsion spring spacing along the horizontal axis of deployed parabolic profiles will result in minimizing the area between the model’s rigid-link approximation and smooth curve. The model is demonstrated through the physical construction of a deployable airfoil surface and a metallic deployable parabolic reflector.

IntroductionPoplar is a tree species with important production and application value. The symbiotic relationship between poplar and arbuscular mycorrhizal fungi (AMF) has a key role in ecosystem functioning. However, there remain questions concerning the seasonal dynamics of the AMF community in poplar roots, the relationship between AMF and the soil environment, and its ecological function.MethodPoplar roots and rhizosphere soil were sampled at the end of April and the end of October. The responses of AMF communities to season, host age, and host species were investigated; the soil environmental factors driving community changes were analyzed.ResultsThe diversity and species composition of the AMF community were higher in autumn than in spring. Season, host age, host species, and soil environmental factors affected the formation of the symbiotic mycorrhizal system and the AMF community. Differences in the communities could be explained by soil pH, total nitrogen, total phosphorus, total potassium, available potassium, and glomalin content.DiscussionThe AMF community was sensitive to changes in soil physicochemical properties caused by seasonal dynamics, particularly total potassium. The change in the mycorrhizal symbiotic system was closely related to the growth and development of poplar trees.

Emergent insects represent a key vector through which aquatic nutrients are transferred to adjacent terrestrial food webs. Aquatic fluxes of polyunsaturated fatty acids (PUFA) from emergent insects are particularly important subsidies for terrestrial ecosystems due to high PUFA contents in several aquatic insect taxa and their physiological importance for riparian predators. While recent meta-analyses have shown the general dichotomy in fatty acid profiles between aquatic and terrestrial ecosystems, differences in fatty acid profiles between aquatic and terrestrial insects have been insufficiently explored. We examined the differences in fatty acid profiles between aquatic and terrestrial insects at a single aquatic-terrestrial interface over an entire growing season to assess the strength and temporal consistency of the dichotomy in fatty acid profiles. Non-metric multidimensional scaling clearly separated aquatic and terrestrial insects based on their fatty acid profiles regardless of season. Aquatic insects were characterized by high proportions of long-chain PUFA, such as eicosapentaenoic acid (20:5n-3), arachidonic acid (20:4n-6), and α-linolenic acid (18:3n-3); whereas terrestrial insects were characterized by high proportions of linoleic acid (18:2n-6). Our results provide detailed information on fatty acid profiles of a diversity of aquatic and terrestrial insect taxa and demonstrate that the fundamental differences in fatty acid content between aquatic and terrestrial insects persist throughout the growing season. However, the higher fatty acid dissimilarity between aquatic and terrestrial insects in spring and early summer emphasizes the importance of aquatic emergence as essential subsidies for riparian predators especially during the breading season.

In this article we illustrate changes taking place in the context, economy and environment in which business schools currently operate. These changes point out the continuous need to devise new business school models to survive and prosper. Further, we elaborate a contextual perspective obtained from the current best practices of business schools to spring forth new strategies in a changing world. After decades of unprecedented growth, business schools are facing an outlook that is suddenly looking much less sunny. Increasing pressure to globalize, declining enrollments, criticism from corporate America, and changes in both business and society are forcing business schools to face the fact that they must adapt or die. As the economy continues to move toward an information-based system, and corporations more heavily favor active learning over theoretical studies, business schools are facing an intensifying crisis. The schools’ best hope is to systematically analyze their own strategies and integrate the concepts of the new economy with their own core values. To devise a strategy for succeeding in these turbulent times, we suggest schools base their strategies in the ANCHORS plan. This helps school officials build from a base that identifies their missions and core competencies, leads them to organizational effectiveness, and helps them create a sustainable advantage in their marketplace. The ANCHORS plan provides a multidimensional basis for coping with changing times and also helps schools identify the markets they will serve.

Quantitative phase microscopy (QPM) is a label-free imaging technique often employed for long-term, high-contrast imaging of live bio-samples. Yet, QPM is not specific to a certain subcellular organelle. As a remedy, fluorescence microscopy can visualize specific subcellular organelles once labeled with fluorescent markers. In this paper, a high-resolution phase/fluorescence dual-modality microscopic imaging method based on structured illumination is proposed. In the dual-modality microscopic system, periodic stripes are generated by a digital micromirror array (DMD), and are used as the common illumination for both modalities. For QPM imaging, the holograms of the sample under structured illuminations of different orientations and phase shifts are recorded, from which a quantitative phase image with resolution enhancement can be reconstructed via a synthetic aperture procedure. Furthermore, a numerical approach is proposed to compensate for the environmental disturbances that often challenge aperture synthesis of phase imaging. This method determines each time the phase distortions caused by environmental disturbances using the spectrum of the 0th order of the structured illumination and subtracts it from the phase distributions of the waves along the 0th, and the ±1st diffraction orders. Resolution enhancement of QPM imaging is realized by synthesizing the spectra of all the waves along different diffraction orders of the structured illuminations of different orientations. With phase images, 3D shapes, inner structures, or refractive index distributions of transparent and translucent samples can be obtained. For fluorescence imaging, intensity images (Morie patterns) of the sample under different structured illuminations are recorded. The spectra along different diffraction orders are separated by using a phase shifting reconstruction algorithm, and are shifted to their original positions, forming a synthesized spectrum that is much larger than the spectra of raw intensity images (NA-limited spectra). An inverse Fourier transform on the synthesized spectrum yields a super-resolution fluorescence image of the sample. With the the reconstructed fluorescence images, specific subcellular organelles labeled with fluorescent markers can be visualized. The combination of quantitative phase microscopy and fluorescence microscopy can obtain multidimensional information about the sample. In this dual-mode imaging system, the spatial resolutions of quantitative phase imaging and fluorescence imaging are 840 nm and 440 nm, respectively. The proposed dual-mode microscopy imaging technique has been demonstrated for imaging fluorescent beads, fly wings, spring/rice leaves, mouse tail transection, and fluorescence-stained SiHa cells. We envisage that this method can be further applied to many fields, such as biomedicine, industry, and chemistry.

AbstractThe influences of river regulations on aquatic biota are insufficiently investigated. We assessed the level of ecological disturbance of the mayfly assemblages through the damming and flow alterations at two highly regulated Mediterranean rivers in Croatia: the Cetina River and its tributary, the Ruda. Contrary to our hypotheses, species richness, abundance and diversity of mayflies increased along the river’s course. At the sites directly influenced by the river regulations, mayfly assemblage changed: it was less diverse and less abundant. However, no obvious influence of the river regulation on the mayfly assemblages was detected for the sites that were indirectly influenced by these alterations. This was most likely due to specific karst hydrology, i.e., the presence of lateral springs along the course of the river. Multidimensional scaling analysis (MDS) revealed grouping of sites according to the similarity in physico-chemical water properties. The pH and water temperature were the most important environmental variables influencing mayfly assemblages. The data on ecology and distribution of mayflies presented in the current study represent a valuable background for further research and conservation practices in the Mediterranean region.

PurposeMotivated by transformations in global food systems and increasing demand for multidimensional credence attributes, the authors analyze cacao value chains in Ecuador – the main producer of fine and flavor cacao worldwide. The authors identify opportunities and discuss how private and public sector initiatives can help meet emerging challenges.Design/methodology/approachPrimary information was collected through interviews of actors in the Ecuadorian industry during spring/summer 2020, including cacao producer associations, exporter associations, chocolate processing firms, public institutions and local universities. Two focus groups were also conducted with producers from associations in the Ecuadorian Amazon.FindingsFindings suggest new opportunities for cacao producers and chocolate processors have emerged from the global market transformation. To exploit these, firms need to personalize and differentiate their products, for example, by using quality certifications such as organic and fair trade. Market developments, such as European cadmium regulations and the necessity of worldwide traceability systems, are driving exporters to enhance Ecuador’s cacao value chains. The sector still requires coordination to reap the benefits associated with demands for credence attributes.Originality/valueFindings are supported by two case studies. The first focuses on how associativity can help those producing high-quality beans to differentiate themselves in modern agri-food markets. The second describes the success of a local chocolate firm and its links with local farmers.

Purpose The purpose of this paper is to conceptually examine the phenomenon of wellness tourism under a holistic and systemic lens, focusing on the offer system and the main components necessary for the staging of wellness experiences. This approach to holistic wellbeing within the tourism sector has led to a broadening of the type of services and experiences that make up the value propositions that can positively contribute to people’s wellbeing. Design/methodology/approach This study identifies and defines the components of wellness tourism (including sectors not traditionally associated with it) through a review and analysis of the extant literature on “wellness tourism” and “wellbeing tourism” of the past two decades; the components were classified through an open coding process. Findings Wellness tourism, as a broad multidimensional concept, is composed by ten different components of the offer system: hot springs, spas, medical tourism, care of the body and mind, enogastronomy, sports, nature and environment, culture, spirituality and events. Each of these categories may represent a single touristic offer targeted to specific market segments, but they may also be one of several components within an integrated mix of tourism products proposed. Originality/value A holistic view of wellness tourism has implications for strategic marketing processes. Destination Management Organizations and company managers should segment their demand according to more innovative criteria than what has traditionally been adopted for wellness in terms of health care and medical procedures. Value propositions for tourists should be wellness-driven to satisfy the growing demand for wellness/well-being and should involve the participation of all the various actors and producers within the wellness tourism offer system at wellness destinations.

Plant-parasitic nematodes (PPN) limit yields in vegetable production in the United States. During the spring and fall cropping seasons of 2018, 436 fields in bare ground and plastic bed cropping systems were randomly sampled from 29 counties in Southern Georgia. The incidence (%), mean and maximum relative abundance (nematodes per 100 cm3 of soil ) of the 10 different PPN genera detected in 32 vegetable crops in bare ground and plastic bed cropping systems include Meloidogyne spp. (67.3, 292, 14144), Nanidorus spp. (49.4, 6, 136), Mesocriconema spp. (39.6, 17, 340), Helicotylenchus spp. (31.6, 20, 1152), Pratylenchus spp. (20.1, 2, 398), Rotylenchulus spp. (5.9, 1, 116), Hoplolaimus spp. (12.6, 1, 78), Heterodera spp. (2.3, <1, 60), Tylenchorhynchus spp. (0.9, <1, 12) and Xiphinema spp. (0.2, <1, 2). A Non-metric Multidimensional Scaling analysis (NMS or NMDS) indicated that most environmental and geological factors (i.e. longitude, precipitation, soil moisture, sand + silt content, and soil electrical conductivity) had no apparent relationship with nematode counts, except for latitude, soil pH and temperature. Multi-rank Permutation Procedure (MRPP) followed by Indicator Species Analysis (ISA) and non-parametric Kruskal-Wallis Analysis of Variance (KW ANOVA) indicated that Meloidogyne spp. was the predominant PPN associated with plastic beds in the South region sampled. The South region consisted mainly of commercial fields that rotated multiple vegetable crops through the same plastic beds. All other PPNs were associated with bare ground beds in the North region that are commonly rotated with row crops. This study validates that Meloidogyne spp. is the most important PPN in vegetable fields of Southern Georgia and suggests that cropping systems have a greater effect on PPN population dynamics than the environment.

IntroductionNew digital technologies hold promise for equalising access to information and communication for the Deaf community. SMS technology, for example, has helped to equalise deaf peoples’ access to information and made it easier to communicate with both deaf and hearing people (Tane Akamatsu et al.; Power and Power; Power, Power, and Horstmanshof; Valentine and Skelton, "Changing", "Umbilical"; Harper). A wealth of anecdotal evidence and some recent academic work suggests that new media technology is also reshaping deaf peoples’ sense of local and global community (Breivik "Deaf"; Breivik, Deaf; Brueggeman). One focus of research on new media technologies has been on technologies used for point to point communication, including communication (and interpretation) via video (Tane Akamatsu et al.; Power and Power; Power, Power, and Horstmanshof). Another has been the use of multimedia technologies in formal educational setting for pedagogical purposes, particularly English language literacy (e.g. Marshall Gentry et al.; Tane Akamatsu et al.; Vogel et al.). An emphasis on the role of multimedia in deaf education is understandable, considering the on-going highly politicised contest over whether to educate young deaf people in a bilingual environment using a signed language (Swanwick & Gregory). However, the increasing significance of social and participatory media in the leisure time of Westerners suggests that such uses of Web 2.0 are also worth exploring. There have begun to be some academic accounts of the enthusiastic adoption of vlogging by sign language users (e.g. Leigh; Cavander and Ladner) and this paper seeks to add to this important work. Web 2.0 has been defined by its ability to, in Denise Woods’ word, “harness collective intelligence” (19.2) by providing opportunities for users to make, adapt, “mash up” and share text, photos and video. As well as its well-documented participatory possibilities (Bruns), its re-emphasis on visual (as opposed to textual) communication is of particular interest for Deaf communities. It has been suggested that deaf people are a ‘visual variety of the human race’ (Bahan), and the visually rich presents new opportunities for visually rich forms of communication, most importantly via signed languages. The central importance of signed languages for Deaf identity suggests that the visual aspects of interactive multimedia might offer possibilities of maintenance, enhancement and shifts in those identities (Hyde, Power and Lloyd). At the same time, the visual aspects of the Web 2.0 are often audio-visual, such that the increasingly rich resources of the net offer potential barriers as well as routes to inclusion and community (see Woods; Ellis; Cavander and Ladner). In particular, lack of captioning or use of Auslan in video resources emerges as a key limit to the accessibility of the visual Web to deaf users (Cahill and Hollier). In this paper we ask to what extent contemporary digital media might create moments of permeability in what Krentz has called “the hearing line, that invisible boundary separating deaf and hearing people”( 2)”. To provide tentative answers to these questions, this paper will explore the use of participatory digital media by a group of young Deaf people taking part in a small-scale digital moviemaking project in Sydney in 2009. The ProjectAs a starting point, the interdisciplinary research team conducted a video-making course for young deaf sign language users within the Department of Media, Music and Cultural Studies at Macquarie University. The research team was comprised of one deaf and four hearing researchers, with expertise in media and cultural studies, information technology, sign language linguistics/ deaf studies, and signed language interpreting. The course was advertised through the newsletter of partner organization the NSW Deaf Society, via a Sydney bilingual deaf school and through the dense electronic networks of Australian deaf people. The course attracted fourteen participants from NSW, Western Australia and Queensland ranging in age from 10 to 18. Twelve of the participants were male, and two female. While there was no aspiration to gather a representative group of young people, it is worth noting there was some diversity within the group: for example, one participant was a wheelchair user while another had in recent years moved to Sydney from Africa and had learned Auslan relatively recently. Students were taught a variety of storytelling techniques and video-making skills, and set loose in groups to devise, shoot and edit a number of short films. The results were shared amongst the class, posted on a private YouTube channel and made into a DVD which was distributed to participants.The classes were largely taught in Auslan by a deaf teacher, although two sessions were taught by (non-deaf) members of Macquarie faculty, including an AFI award winning director. Those sessions were interpreted into Auslan by a sign language interpreter. Participants were then allowed free creative time to shoot video in locations of their choice on campus, or to edit their footage in the computer lab. Formal teaching sessions lasted half of each day – in the afternoons, participants were free to use the facilities or participate in a range of structured activities. Participants were also interviewed in groups, and individually, and their participation in the project was observed by researchers. Our research interest was in what deaf young people would choose to do with Web 2.0 technologies, and most particularly the visually rich elements of participatory and social media, in a relatively unstructured environment. Importantly, our focus was not on evaluating the effectiveness of multimedia for teaching deaf young people, or the level of literacy deployed by deaf young people in using the applications. Rather we were interested to discover the kinds of stories participants chose to tell, the ways they used Web 2.0 applications and the modalities of communication they chose to use. Given that Auslan was the language of instruction of the course, would participants draw on the tradition of deaf jokes and storytelling and narrate stories to camera in Auslan? Would they use the format of the “mash-up”, drawing on found footage or photographs? Would they make more filmic movies using Auslan dialogue? How would they use captions and text in their movies: as subtitles for Auslan dialogue? As an alternative to signing? Or not at all? Our observations from the project point to the great significance of the visual dimensions of Web 2.0 for the deaf young people who participated in the project. Initially, this was evident in the kind of movies students chose to make. Only one group – three young people in their late teens which included both of the young women in the class - chose to make a dialogue heavy movie, a spoof of Charlie’s Angels, entitled Deaf Angels. This movie included long scenes of the Angels using Auslan to chat together, receiving instruction from “Charlie” in sign language via videophone and recruiting “extras”, again using Auslan, to sign a petition for Auslan to be made an official Australian language. In follow up interviews, one of the students involved in making this film commented “my clip is about making a political statement, while the other [students in the class] made theirs just for fun”. The next group of (three) films, all with the involvement of the youngest class member, included signed storytelling of a sort readily recognisable from signed videos on-line: direct address to camera, with the teller narrating but also taking on the roles of characters and presenting their dialogue directly via the sign language convention of “role shift” - also referred to as constructed action and constructed dialogue (Metzger). One of these movies was an interesting hybrid. The first half of the four minute film had two young actors staging a hold-up at a vending machine, with a subsequent chase and fight scene. Like most of the films made by participants in the class, it included only one line of signed dialogue, with the rest of the narrative told visually through action. However, at the end of the action sequence, with the victim safely dead, the narrative was then retold by one of the performers within a signed story, using conventions typically observed in signed storytelling - such as role shift, characterisation and spatial mapping (Mather & Winston; Rayman; Wilson).The remaining films similarly drew on action and horror genres with copious use of chase and fight scenes and melodramatic and sometimes quite beautiful climactic death tableaux. The movies included a story about revenging the death of a brother; a story about escaping from jail; a short story about a hippo eating a vet; a similar short comprised of stills showing a sequence of executions in the computer lab; and a ghost story. Notably, most of these movies contained very little dialogue – with only one or two lines of signed dialogue in each four to five minute video (with the exception of the gun handshape used in context to represent the object liberally throughout most films). The kinds of movies made by this limited group of people on this one occasion are suggestive. While participants drew on a number of genres and communication strategies in their film making, the researchers were surprised at how few of the movies drew on traditions of signed storytelling or jokes– particularly since the course was targeted at deaf sign language users and promoted as presented in Auslan. Consequently, our group of students were largely drawn from the small number of deaf schools in which Auslan is the main language of instruction – an exceptional circumstance in an Australian setting in which most deaf young people attend mainstream schools (Byrnes et al.; Power and Hyde). Looking across the Hearing LineWe can make sense of the creative choices made by the participants in the course in a number of ways. Although methods of captioning were briefly introduced during the course, iMovie (the package which participants were using) has limited captioning functionality. Indeed, one student, who was involved in making the only clip to include captioning which contextualised the narrative, commented in follow-up interviews that he would have liked more information about captioning. It’s also possible that the compressed nature of the course prevented participants from undertaking the time-consuming task of scripting and entering captions. As well as being the most fun approach to the projects, the use of visual story telling was probably the easiest. This was perhaps exacerbated by the lack of emphasis on scriptwriting (outside of structural elements and broad narrative sweeps) in the course. Greater emphasis on that aspect of film-making would have given participants a stronger foundational literacy for caption-based projectsDespite these qualifications, both the movies made by students and our observations suggest the significance of a shared visual culture in the use of the Web by these particular young people. During an afternoon when many of the students were away swimming, one student stayed in the lab to use the computers. Rather than working on a video project, he spent time trawling through YouTube for clips purporting to show ghost sightings and other paranormal phenomena. He drew these clips to the attention of one of the research team who was present in the lab, prompting a discussion about the believability of the ghosts and supernatural apparitions in the clips. While some of the clips included (uncaptioned) off-screen dialogue and commentary, this didn’t seem to be a barrier to this student’s enjoyment. Like many other sub-genres of YouTube clips – pranks, pratfalls, cute or alarmingly dangerous incidents involving children and animals – these supernatural videos as a genre rely very little on commentary or dialogue for their meaning – just as with the action films that other students drew on so heavily in their movie making. In an E-Tech paper entitled "The Cute Cat Theory of Digital Activism", Ethan Zuckerman suggests that “web 1.0 was invented to allow physicists to share research papers and web 2.0 was created to allow people to share pictures of cute cats”. This comment points out both the Web 2.0’s vast repository of entertaining material in the ‘funny video’genre which is visually based, dialogue free, entertaining material accessible to a wide range of people, including deaf sign language users. In the realm of leisure, at least, the visually rich resources of Web 2.0’s ubiquitous images and video materials may be creating a shared culture in which the line between hearing and deaf people’s entertainment activities is less clear than it may have been in the past. The ironic tone of Zuckerman’s observation, however, alerts us to the limits of a reliance on language-free materials as a route to accessibility. The kinds of videos that the participants in the course chose to make speaks to the limitations as well as resources offered by the visual Web. There is still a limited range of captioned material on You Tube. In interviews, both young people and their teachers emphasised the central importance of access to captioned video on-line, with the young people we interviewed strongly favouring captioned video over the inclusion on-screen of simultaneous signed interpretations of text. One participant who was a regular user of a range of on-line social networking commented that if she really liked the look of a particular movie which was uncaptioned, she would sometimes contact its maker and ask them to add captions to it. Interestingly, two student participants emphasised in interviews that signed video should also include captions so hearing people could have access to signed narratives. These students seemed to be drawing on ideas about “reverse discrimination”, but their concern reflected the approach of many of the student movies - using shared visual conventions that made their movies available to the widest possible audience. All the students were anxious that hearing people could understand their work, perhaps a consequence of the course’s location in the University as an overwhelmingly hearing environment. In this emphasis on captioning rather than sign as a route to making media accessible, we may be seeing a consequence of the emphasis Krentz describes as ubiquitous in deaf education “the desire to make the differences between deaf and hearing people recede” (16). Krentz suggests that his concept of the ‘hearing line’ “must be perpetually retested and re-examined. It reveals complex and shifting relationships between physical difference, cultural fabrication and identity” (7). The students’ movies and attitudes emphasised the reality of that complexity. Our research project explored how some young Deaf people attempted to create stories capable of crossing categories of deafness and ‘hearing-ness’… unstable (like other identity categories) while others constructed narratives that affirmed Deaf Culture or drew on the Deaf storytelling traditions. This is of particular interest in the Web 2.0 environment, given that its technologies are often lauded as having the politics of participation. The example of the Deaf Community asks reasonable questions about the validity of those claims, and it’s hard to escape the conclusion that there is still less than appropriate access and that some users are more equal than others.How do young people handle the continuing lack of material available to the on the Web? The answer repeatedly offered by our young male interviewees was ‘I can’t be bothered’. As distinct from “I can’t understand” or “I won’t go there” this answer, represented a disengagement from demands to identify your literacy levels, reveal your preferred means of communication; to rehearse arguments about questions of access or expose attempts to struggle to make sense of texts that fail to employ readily accessible means of communicating. Neither an admission of failure or a demand for change, CAN’T-BE-BOTHERED in this context offers a cool way out of an accessibility impasse. This easily-dismissed comment in interviews was confirmed in a whole-group discussions, when students came to a consensus that if when searching for video resources on the Net they found video that included neither signing nor captions, they would move on to find other more accessible resources. Even here, though, the ground continues to shift. YouTube recently announced that it was making its auto-captioning feature open to everybody - a machine generated system that whilst not perfect does attempt to make all YouTube videos accessible to deaf people. (Bertolucci).The importance of captioning of non-signed video is thrown into further significance by our observation from the course of the use of YouTube as a search engine by the participants. Many of the students when asked to research information on the Web bypassed text-based search engines and used the more visual results presented on YouTube directly. In research on deaf adolescents’ search strategies on the Internet, Smith points to the promise of graphical interfaces for deaf young people as a strategy for overcoming the English literacy difficulties experienced by many deaf young people (527). In the years since Smith’s research was undertaken, the graphical and audiovisual resources available on the Web have exploded and users are increasingly turning to these resources in their searches, providing new possibilities for Deaf users (see for instance Schonfeld; Fajardo et al.). Preliminary ConclusionsA number of recent writers have pointed out the ways that the internet has made everyday communication with government services, businesses, workmates and friends immeasurably easier for deaf people (Power, Power and Horstmanshof; Keating and Mirus; Valentine and Skelton, "Changing", "Umbilical"). The ready availability of information in a textual and graphical form on the Web, and ready access to direct contact with others on the move via SMS, has worked against what has been described as deaf peoples’ “information deprivation”, while everyday tasks – booking tickets, for example – are no longer a struggle to communicate face-to-face with hearing people (Valentine and Skelton, "Changing"; Bakken 169-70).The impacts of new technologies should not be seen in simple terms, however. Valentine and Skelton summarise: “the Internet is not producing either just positive or just negative outcomes for D/deaf people but rather is generating a complex set of paradoxical effects for different users” (Valentine and Skelton, "Umbilical" 12). They note, for example, that the ability, via text-based on-line social media to interact with other people on-line regardless of geographic location, hearing status or facility with sign language has been highly valued by some of their deaf respondents. They comment, however, that the fact that many deaf people, using the Internet, can “pass” minimises the need for hearing people in a phonocentric society to be aware of the diversity of ways communication can take place. They note, for example, that “few mainstream Websites demonstrate awareness of D/deaf peoples’ information and communication needs/preferences (eg. by incorporating sign language video clips)” ("Changing" 11). As such, many deaf people have an enhanced ability to interact with a range of others, but in a mode favoured by the dominant culture, a culture which is thus unchallenged by exposure to alternative strategies of communication. Our research, preliminary as it is, suggests a somewhat different take on these complex questions. The visually driven, image-rich approach taken to movie making, Web-searching and information sharing by our participants suggests the emergence of a certain kind of on-line culture which seems likely to be shared by deaf and hearing young people. However where Valentine and Skelton suggest deaf people, in order to participate on-line, are obliged to do so, on the terms of the hearing majority, the increasingly visual nature of Web 2.0 suggests that the terrain may be shifting – even if there is still some way to go.AcknowledgementsWe would like to thank Natalie Kull and Meg Stewart for their research assistance on this project, and participants in the course and members of the project’s steering group for their generosity with their time and ideas.ReferencesBahan, B. "Upon the Formation of a Visual Variety of the Human Race. In H-Dirksen L. Baumann (ed.), Open Your Eyes: Deaf Studies Talking. 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