Factors determining changes in the network of marked hiking trails in the Sudetes

Hiking trails are a basic type of tourist infrastructure,which,on the one hand,make areas available for tourist traffic,and on the other hand,can contribute to the protection of the natural environment(if they are well designed and maintained).Owing to the variety of performed functions,their designation is determined by several factors:natural,technical,economic,social.Networks of trails change constantly.The aim of this article is to determine exactly what factors influence transformations within the hiking trail networks and what is their significance.To this end,three study areas in the Sudetes were analysed:one on the Polish side of the Sudetes-the Table(Stołowe)Mountains,and two on the Czech side-the rock town near the village of Sloup vČechách and the central part of Zlatohorskávrchovina.An analysis of changes in the shape of the networks over time was carried out,as well as surveys of institutions that were responsible for or influenced these transformations.These areas are characterised by a significant level of changes in the trail network.Among the factors influencing these changes,the tourist attractiveness of the area,the resilience of the environment,the intensity of tourism traffic,the environmental transformations associated with it,the history of tourism development and land ownership changes should be considered the most important.At each stage of forming networks,the key factor should be tourists’needs,including the desire to escape the urbanised environment.For this reason,trails should avoid roads with artificial(hard)surfaces and heavy automobile traffic.

Influence of layout of scanners on intelligent mine scanning trails

To expand scanning area and attack range without changing the inner structure of intelligent warhead, a new arrangement mode of the scanner for intelligent mine is proposed. The required coordinate systems are established firstly on the basis of advanced dynamics principle. and the exterior ballistics equations are deduced. Then the equations of scanning trails are established by the method of space analytic geometry. To get the scanning trails. the differential equations are transformed into discrete simulation model using the algorithm of fourth order Runge-Kutta and then are simulated using Matlab. Compared with the scanning trails obtained by the traditional layout of scanner, the scanning trails obtained by the proposed layout of scanner has larger horizontal range of scanning circle and bigger trarget acquisition probability. Therefore, the new arrangement mode of the scanner for intelligent mine can increase attack range.

美国信息能力在线测评SAILS和TRAILS简介

美国肯特州立大学设计的信息素养能力标准评估项目SAILS和信息素养能力实时测评量表TRAILS,可用于评估大、中学生的信息知识和能力水平。作为标准化测试项目,它们具有较高的信度和效度,实施管理简便,能提供内部和外部评价比较。

Flagstaff Urban Trails System and Its Inspiration for the Construction of China National Trails System

Flagstaff Urban Trails System(FUTS) is a city-wide network of non-motorized, shared-use pathways that are used by bicyclists, walkers, hikers, runners, and other users for both recreation and transportation. FUTS totals 79.2 km in Flagstaff, the Flagstaff government approved the fi rst plan in 1988, and FUTS Trail Priority Evaluation 2011 outlined the evaluation criteria, trail rankings and ranking results The new FUTS Master Plan shows about 130-km planned trails, and creates an ultimate trail system about 210 km. FUTS management organization and Transportation Tax Program is the key to keep the successful works of FUTS. Status quo of China National Trails System(CNTS) is reviewed as: scenic areas have relatively sound trail systems, but there is no any standard system; green corridors within the urban and rural system become popular, but there is no connection system. The development of China National Trails System can be promoted in 3 aspects: establishing national trails system, planning and design trails comprehensively, stressing daily operation and management.

Networks of hiking tourist trails in the Krkono?e(Czech Republic) and Peneda-Gerês(Portugal) national parks-comparative analysis

Tourist trails as a linear form of tourist infrastructure fulfill various functions(i.e. recreational, ecological, economic, social, ensuring safety). They are especially important in national parks, where in selected areas tourist penetration is allowed only along specially designed, official routes. A well-planned layout of tourist trails with appropriate facilities can help to limit the negative consequences of tourist pressure on protected natural areas. The aim of the article is a comparison of offers for active tourists in two mountain national parks(the Krkono?e National Park in the Czech Republic and the Peneda-Gerês National Park in Portugal), taking into consideration the marked hiking trails – the most frequently used type of tourist trails. As a result the level of area coverage by the networks of hiking trails was assessed, as well as their adequateness towards the needs of tourists. The descriptive analysis was based on author's personal observations. In the examination of hiking trails as part of a system, some elements of the graph theory were used, especially coefficients for topologic analysis of spatial structure. This method enables simplification of a network, comparison of various areas and making some assumptions concerning tourist infrastructure, which is a crucial factor while analyzing trails from a tourists' point of view. In both analyzed national parks the relief is quite similar, as well as their locations near national borders, what justifies the choice of the areas scrutinized in the paper. What differ them are patterns of tourism development and the current ways of undertaking active tourism. Not similarities but the two latter factors resulted in a distinct character of the two compared networks of trails and facilities connected with them. The system of hiking trails and tourist infrastructure seem better developed in the Krkono?e National Park, what can be explained by historical and social conditions, especially the adopted model of hiking. In the article some disadvantages of tourist infrastructure in both protected areas were presented, as well as some suggestions in terms of its development, resulting from the analysis of networks of hiking trails.

Status and outlook of hiking trails in the central part of the Low Tatra Mountains in Slovakia between 1980–1981 and 2013–2014

This study presents a methodology for assessment of the condition of hiking trails(HTs) and their impact zones in the central part of the Low Tatra mountain range, based on comparison of two complex data sets gathered in 33 years apart. The first field investigation was performed in 1980 and 1981, and the second in 2013 and 2014. The main goal was to perform a landscape typology in order to assess the susceptibility of landscape complexes to occurrence of anthropogenic and natural destruction processes and to assess the condition and prospects of HTs and their impacts on the adjacent alpine environment. Landscape complexes were characterised by selected abiotic, biotic and technical parameters of HTs and their impact zones. Due to the high variability of these parameters over the length of the HTs, we had to decide on how to map them. This was done using a square grid with 100 m-sized cells. For each cell with HT, the parameters were assigned the typical value within that cell. In total, 26.3 km of HT were studied, stretching over 266 grid cells. On comparison of the two data sets, it was seen that, 64%(171 grid cells) display a generally positive condition, with 54%(143 grid cells) even exhibiting significant improvement or continuously positive state of their condition. 36%(95 grid cells) were in bad condition, including 3%(9 grid cells) whose state had deteriorated, and 2%(6 grid cells) whose state had significantly deteriorated, in the time between the two assessments.

Changes in the network of tourist trails in the border zones of the Czech Republic after entering the Schengen area

Among the factors influencing tourist trail network development are political issues, including the presence of state borders, the possibility of crossing them and the accessibility of border zones. In the article, it was decided to look at changes in the offer of tourist trails(hiking and cycling) along the entire border of the Czech Republic after the extension of the Schengen area(within this area, crossing the border is possible anywhere, and not only at official border crossings). It should be emphasized here that the borders of the Czech Republic over most of their length run through mountainous areas and, apart from political factors, natural features should have a major impact on the development of tourist routes. In order to determine the coherence of the current network of trails on both sides of the Czech Republic state border, modern tourist maps have been analyzed, determining the number of places where it is possible to cross the state border with the help of a marked tourist trail. Based on that, two indicators were introduced to determine the degree of openness with all neighboring countries as regards the opportunity to cross on a tourist trail. Changes in the historical situation, a comparison of the accessibility of the border area before entering the Schengen area and 2019, were analyzed for two study areas using archival maps. Over a decade after the extension of the Schengen area, the number of places where tourist trails of neighboring countries approach the border has clearly increased. Crossing is more often made possible using hiking trails than cycling routes(trails of the first type cross the border every 7.91 km, while the latter every 13.3 km), but considering the speed of movement, it can be assessed that the openness for cyclists is higher than for hikers. Moreover, in many places there is still significant potential for further integration of tourist trail networks as trails created in one country often do not have a continuation on the other side of the border.

A Defect Formation as Snail Trails in Photovoltaic Modules

In this paper, we discussed the field failures of the brownish discolored lines like snail trails in PV modules. We were successful simulation snail trails in laboratory and outdoor field. We had found out some types EVA (ethylene vinyl acetate) encapsulants and back sheets which had the serious snail trails but others were snail trails free. Furthermore, according to IEC 61215 accelerated aging testing, we also found only within 2% power loss after these modules impacted by snail trails. The main power losses over 5% were come from cell micro cracks before snail trail formation. That snail trails occurrence means solar cells should have micro cracks. In here, we contributed the snail trail effects and avoided the failures in future photovoltaic modules performance.

Residual tree damage along skidding trails in beech stands in Greece

We studied the damage caused to unfelled trees during skidding operations in four beech stands of northern and central Greece that were managed under differing harvesting systems.After timber was harvested we recorded and analyzed all damage to a width of 2 m along both sides of the skid trails.The percentage of damaged residual trees was 17–28 %.Higher numbers of saplings were uprooted or destroyed in parts of the stands with high natural regeneration.Most damaged trees suffered 1.33–1.90 wounds that were inflicted up to a height of 1 m above ground level.At all sites mean wound sizes were large,89–1190 cm2,and caused elevated risk of future fungal infection.The damage caused by skidding during timber harvesting can be minimized by better planning the harvest operations,and training forest workers in reduced impact logging.

Exercise-based rehabilitation programmes for pulmonary hypertension:a systematic review and meta-analysis of randomized controlled trails

Objective Individuals with pulmonary hypertension(PH)have reduced exercise capacity and quality of life.Exercise-based rehabilitation may have beneficial effects to improve the exercise capacity and quality of life in patients with PH.We aim to assess the efficacy and safety of exercised-based rehabilitation for people eith PH by performing a randomized controlled trails(RCTs)meta-analysis of exercised-based rehabilitation for people with PH by performing a randomized controlled trails meta-analysis.

美国信息素养测评工具TRAILS的开发及启示

依据学生信息素养标准,美国信息素养测评工具(TRAILS)从学生信息获取能力、信息使用能力与信息道德伦理3个层面,基于科学测评学生信息素养的目的,凭借灵活多样的测评结构、统筹信息技术的运行方式以及多方参与合作等优势,为教师提升信息教学水平和学生自主发展信息素养提供了理念、技术和资源支撑。TRAILS的设计和实施经验启示我们,应基于个人发展、学校差异、技术要求以及社会资源等多方实际,注重信息伦理价值,充分尊重不同学校和个体的差异,开发权威的数字化网络平台,整合社会资源搭建多方参与的信息素养联盟,构建具有本土特色的信息素养测评工具。

Sinochem Blazing New Trails

Reporter: In December 1994, the China National Chemical Import and Export Corporation (Sinochem) was officially approved by the State Council as the first experimental enterprise of a national complex. This is Sinochem’s another strategic step—also the first step among China’s foreign trade corporations since 1988 for internationalized management on a trial basis. President Zheng Dunxun, as a pioneer for restructuring the state’s foreign economic and trade institutions and national medium-to-large enterprises, would you please say something

Soil physical properties degrade further on skid trails in the year following operations

Short-term recovery of soil physical properties on skid trails was investigated upon cessation of skidding operations and 1 year later. Bulk density and porosity were assessed at three levels of traffic intensity and two slope gradients. Compared to undisturbed areas, bulk density increased, total porosity and macroporosity decreased, and microporosity increased in the compacted areas immediately after skidding. In all cases, changes were significantly greater when traffic intensity was higher and when slopes were steeper. Surface soil compaction did not show any recovery over the 1-year period, illustrating the persistent effects of compaction on soil structure. In fact, surficial compaction further increased and macroporosity further decreased after 1 year of recovery, compared to immediately after skidding. While these changes may reflect inherent small-scale site variability or differences in soil moisture content at times of sampling, direct negative physical impacts on newly exposed soil（such as by raindrops）, in addition to the loss of organic matter after canopy removal and skidding, likely delayed any physical recovery, particularly on heavily trafficked trails on steeper slopes. These results raise serious concerns about longterm resilience to traffic on forest soils and indicate the necessity to properly retire skid trails to avoid further soil degradation as trails age.

TRAILS ON A REGULAR DIFFUSION-LIMITED AGGREGATION FRACTAL

By an exact renormalization method the trail problem on a regular fractal for the diffusion-limited aggregation is considered,and the mean square end-toend distance critical exponent v is obtained.It is indicated that self-avoiding trails and self-avoiding walks are in different universality classes on this irreversible kinetic growth fractal.

Landscape Planning and Design of Urban Forest Park Trails: A Case Study of Yaohu Country Forest Park in Nanchang City

Urban forest parks are open parks based on natural countryside, which can be used for outdoor sports, leisure and recreation, popular science education and other activities. The trail is a pedestrian road connecting various landscape points in the park. It not only has directional and traffic functions, but also is the most effective means for the organization of the whole park. Taking Yaohu Country Forest Park in Nanchang City as an example, this study analyzed and discussed the design of trails and landscapes.

The Software for Constructing Trails with Local Restrictions in Graphs

The present research considers the problem of covering a graph with minimal number of trails satisfying the pre-defined local restrictions. The research is devoted to the problem of graph covering by minimal number of trails satisfying some local restrictions. Algotithm of allowed Eulerian cycle construction is considered. The authors showed that it is possible to recognize the system of transitions and solve the problem of constructing the allowable path by linear time. It’s also possible to find allowable Eulerian cycle for Eulerian graph or to proclaim that such a cycle does not exist by the time O(|V(G)|.|E(G)|). All presented algorithms have the software realization.

Hiking trails慢行生态空间探究--以齐长城文化为例

Hiking trails是一种文化精神,是人们追求诗与远方的路径和方式之一。文章依托齐长城的文化背景,探索齐长城文化下的慢行生态空间,建立乡村Hiking trails绿道慢行系统。建立Trail慢行系统是保护生态环境的新思路,能对推动齐长城遗产文化的传播与传承起到积极作用,为乡村文化提供更好的发展前景,为乡村的生活提供丰富的文化空间,实现区域生态效益、社会效益和经济效益三者协调发展,实现生态效益最大化。同时,参与户外活动也有利于人们的身心健康。

The interactive process of cultural landscape:Taking the trails around Zhengqi Pavilion as an example

Cultural landscape is a social natural process under which people actively participate in thinking,feeling,and acting.On this basis,their connection with a certain part of the environment in turn affects people’s perception of the world and the products of their actions.Trails is a representative and complex practice of integrating nature into society and transforming it into a mixed entity.However,the dynamic and diverse relationships of cultural landscapes represented by this interactive process have not been well interpreted in landscape research.The research first discusses the conceptualization and value theory of cultural landscape,and develops the methodology of cultural landscape interaction process research combining typology and Network theory.Taking the trails spontaneously formed around the Zhengqi Pavilion of Sun Yat-sen Mausoleum in Nanjing as an example,this paper discusses the interaction process of trails as a cultural landscape.Based on the analysis results,we obtained the dynamic characteristics of cultural landscapes by treating trails as a network,while obtaining the value expression created by typology.

Asymptotic enumeration theorems for the numbers of spanning trees and Eulerian trails in circulant digraphs and graphs

The asymptotic properties of the numbers of spanning trees and Eulerian trails in circulant digraphs and graphs are studied. Let $C\left( {p,s_1 ,s_2 , \cdots ,s_k } \right)$ be a directed circulant graph. Let $\left( {C\left( {p,s_1 ,s_2 , \cdots ,s_k } \right)} \right)$ and $\left( {C\left( {p,s_1 ,s_2 , \cdots ,s_k } \right)} \right)$ be the numbers of spanning trees and of Eulerian trails, respectively. Then $$\begin{array}{*{20}c} \begin{gathered} \lim \frac{1}{k}\sqrt[p]{{T\left( {C\left( {p,s_1 ,s_2 , \cdots ,s_k } \right)} \right)}} = 1, \hfill \\ \lim \frac{1}{{k!}}\sqrt[p]{{E\left( {C\left( {p,s_1 ,s_2 , \cdots ,s_k } \right)} \right)}} = 1, \hfill \\ \end{gathered} & {p \to \infty .} \\ \end{array} $$ Furthermore, their line digraph and iterations are dealt with and similar results are obtained for undirected circulant graphs.

Genetic interpretation of fish swimming trails and calculation of fish-body length in Late Triassic Hengshan, Shannxi Province, China

The fish swimming trail fossils are rare and, therefore, precious. The specimen de-scribed abroad are generally smaller or more poorly preserved. The specimens used in the pre-sent study and derived from the Mesozoic strata in Hengshan County, Shaanxi Province, China, are rare because of their completeness (with the length of the specimen reaching 4 m), exquisiteness and largeness in trace body. These specimens, classified as four ichnospecies, including two new ones, show the morphological pattern of the fish swimming trails. The trace fish bodies are calculated to be 32—92 cm long.