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| 1 | Improving the performance of conventional base isolation systems by an external variable negative stiffness device under near-fault and long-period ground motions显示文摘Recent studies have shown that base-isolated objects with long fundamental natural periods are highly influenced by long-period earthquakes. These long-period waves result in large displacements for isolators, possibly leading to exceedance of the allowable displacement limits. Conventional isolation systems, in general, fail to resist such large displacements. This has prompted the need to modify conventional base isolation systems. The current work focuses on the development of an external device, comprising a unit of negative and positive springs, for improving the performance of conventional base isolation systems. This unit accelerates the change in the stiffness of the isolation system where the stiffness of the positive spring varies linearly in terms of the displacement response of the isolated objects. The target objects of the present study are small structures such as computer servers, sensitive instruments and machinery. Numerical studies show that the increase in the damping of the system and the slope of the linear function is effective in reducing the displacement response. An optimal range of damping values and slope, satisfying the stability condition and the allowable limits of both displacement and acceleration responses when the system is subjected to near-fault and long-period ground motions simultaneously, is proposed. | Sandhya Nepal Masato Saitoh | 2020 | Earthquake Engineering and Engineering Vibration2020，19，4： | 6 |
| 2 | New shakedown criterion and permanent deformation properties of unbound granular materials显示文摘Unbound granular material specifications for road pavements in Australia are primarily based on physical material specification rather than mechanical characterisation. This simplified approach does not reflect the actual material performance under repeated dynamic traffic loads. There is a little information available on the influence of the local crushed rock properties and compacted layer properties on permanent deformation (PD). This study aims to characterise the local unbound granular materials in Victoria according to their PD behaviour under repeated loads and to develop a suitable shakedown criterion that could describe the PD of the tested materials to simplify the flexible pavement design. Repeated-load triaxial tests were conducted over several samples with a range of moisture contents, gradations, densities, and stress conditions. The laboratory test results showed that PD behaviour was influenced by several factors. In addition, the tested subbase-specified unbound granular materials reflect high PD resistance that is almost equivalent to basequality unbound granular materials. This may indicate that current requirements for the subbase-quality unbound granular materials are over-prescribe. Moreover, as the existing shakedown criterion was not applicable for the multi-stage repeated-load triaxial test and the local tested materials, a new shakedown criterion and new boundaries are proposed based on the PD behaviour. In the proposed criterion, the shakedown ranges are identified based on the curve angle of the PD vs. logarithm of the number of loading cycles, and this new criterion was validated using several materials from existing literature. The local tested base and subbase materials can be assigned as Range A when PD\1%, Range B when 1%\PD\3%, and Range C when PD[3%. The proposed criterion could provide a useful and quick approach to assess the PD of the unbound granular materials with both single and multistages of stresses. | Ali Alnedawi Kali Prasad Nepal Riyadh Al-Ameri | 2019 | Journal of Modern Transportation2019，27，2： | 3 |
| 3 | Location-allocation modeling for emergency evacuation planning with GIS and remote sensing:A case study of Northeast Bangladesh显示文摘This work developed models to identify optimal spatial distribution of emergency evacuation centers(EECs)such as schools,colleges,hospitals,and fire stations to improve flood emergency planning in the Sylhet region of northeastern Bangladesh.The use of location-allocation models(LAMs)for evacuation in regard to flood victims is essential to minimize disaster risk.In the first step,flood susceptibility maps were developed using machine learning models(MLMs),including:Levenberg-Marquardt back propagation(LM-BP)neural network and decision trees(DT)and multi-criteria decision making(MCDM)method.Performance of the MLMs and MCDM techniques were assessed considering the area under the receiver operating characteristic(AUROC)curve.Mathematical approaches in a geographic information system(GIS)for four well-known LAM problems affecting emergency rescue time are proposed:maximal covering location problem(MCLP),the maximize attendance(MA),p-median problem(PMP),and the location set covering problem(LSCP).The results showed that existing EECs were not optimally distributed,and that some areas were not adequately served by EECs(i.e.,not all demand points could be reached within a 60-min travel time).We concluded that the proposed models can be used to improve planning of the distribution of EECs,and that application of the models could contribute to reducing human casualties,property losses,and improve emergency operation. | Mahfuzur Rahman Ningsheng Chen MdMonirul Islam Ashraf Dewan Hamid Reza Pourghasemi Rana Muhammad AliWashakh Nirdesh Nepal Shufeng Tian Hamid Faiz Mehtab Alam Naveed Ahmed | 2021 | Geoscience Frontiers2021，12，3： | 3 |
| 4 | Upstream-downstream linkages of hydrological processes in the Himalayan region显示文摘Understanding the upstream-downstream linkages in hydrological processes is essential for water resources planning in river basins.Although there are many studies of individual aspects of these processes in the Himalayan region,studies along the length of the basins are limited.This study summarizes the present state of knowledge about linkages in hydrological processes between upstream and downstream areas of river basins in the Himalayan region based on a literature review.The paper studies the linkages between the changes in the physical environment of upstream areas(land use,snow storage,and soil erosion)and of climate change on the downstream water availability,flood and dry season flow,and erosion and sedimentation.It is argued that these linkages are complex due to the extreme altitudinal range associated with the young and fragile geology,extreme seasonal and spatial variation in rainfall,and diversity of anthropogenic processes.Based on the findings,the paper concludes that integrated systems analysis is required to understand the holistic complexity of upstream-downstream linkages of hydrological processes in the river basin context.The integrated land and water resources management(ILWRM)approach can be instrumental in developing adaptive solutions to problems and can also enable stakeholders of upstream and downstream areas with various interests and needs to work together for the better utilization and management of land and water resources.As a part of this,the specific circumstances of the upstream communities,who live in fragile and inaccessible mountain areas with limited resource opportunities,should be taken into account so that incentive mechanisms can be established to encourage and acknowledge their contribution. | Santosh Nepal Wolfgang-Albert Flugel Arun Bhakta Shrestha | 2014 | Ecological Processes2014，3，1： | 3 |
| 5 | Effect of vertical stress rest period on deformation behaviour of unbound granular materials:Experimental and numerical investigations显示文摘Repeated load triaxial test is used to assess the deformation behaviour of unbound granular materials(UGMs) in flexible road pavements. Repeated load pulse characteristics(i.e. shape, loading period and rest period) are the stress configurations used in the experimental set-up to simulate the passing axle loads. Some researchers and standard testing protocols suggest a rest period of varying durations after a loading phase. A thorough review of existing literature and practises has revealed that there is no agreement about the effect of the rest period of vertical stress pulse on the deformation behaviour of the UGMs. Therefore,the main objective of this study is to investigate the effect of repeated stress rest period on the deformation behaviour of UGMs experimentally. Experiments are conducted, both with and without rest period, using basalt and granite crushed rocks from Victoria, Australia. Furthermore, in order to gain insight into the effect of the rest period, finite element modelling is also developed. Both the experimental and modelling results show that the rest period has a noticeable effect on both resilient and permanent deformation behaviours of UGMs. It is, therefore, recommended to take extra precautions while adopting a particular standard testing protocol and to supplement the results by additional tests with different loading configurations. | Ali Alnedawi Kali Prasad Nepal Riyadh Al-Ameri Mohanad Alabdullah | 2019 | Journal of Rock Mechanics and Geotechnical Engineering2019，11，1： | 2 |
| 6 | 旅游对尼泊尔珠穆朗玛峰国家公园步行道的影响显示文摘本文总结了在尼泊尔珠穆朗玛峰国家公园所做的旅游影响的研究结果,调查了旅游利用和环境特点对步行道的影响。7条步行道分成208个路段,评估的总长度为90km。采用了4级评估体系对步行道的路况进行评价,用Arc/Info和Arc/View地理信息系统(GIS)对旅游利用影响的空间格局进行分析。研究表明旅游利用和道路破坏之间密切相关,但步行道位置和环境因素是同等重要的变量。本研究认为较系统、实验性的研究是必要的,这些工作能够将人类活动导致的步行道损坏和自然因素影响明确地区别开。 | Sanjay K.Nepal Stella Amor Nepal 周立志 | 2004 | AMBIO-人类环境杂志2004，33，6： | 2 |
| 7 | SaC‐FRAPP: a scalable and cost‐effective framework for privacy preservation over big data on cloud显示文摘 | Xuyun Zhang Chang Liu Surya Nepal Chi Yang Wanchun Dou Jinjun Chen | 2013 | Concurrency Computat: Pract Exper2013，，18： | 2 |
| 8 | Activation of autophagy by globular adiponectin attenuates ethanol-induced apoptosis in HepG2 cells: Involvement of AMPK/FoxO3A axis显示文摘 | Saroj Nepal Pil-Hoon Park | 2013 | BBA - Molecular Cell Research2013，，10： | 2 |
| 9 | 高位食管静脉曲张破裂出血患者内镜诊治经验:10年单中心回顾性分析显示文摘目的探索高位食管静脉曲张破裂出血(SEVB)患者内镜诊治特点及预后。方法2010年1月~2020年1月哈尔滨医科大学附属第二医院内镜中心行内镜诊治的食管胃静脉曲张(GEV)患者25539例,其中SEVB者12例(0.4‰),其中采用急诊内镜下止血5例,非急诊内镜下止血7例。结果12例SEVB患者中,乙型肝炎肝硬化5例,丙型肝炎肝硬化4例,酒精性肝炎肝硬化2例,不明原因性肝硬化1例;11例有明显的呕血、黑便、便血或周围循环障碍临床表现;5例急诊内镜下即时止血均成功,7例非急诊内镜下即时止血成功6例,无统计学差异(P>0.05);9例单用食管静脉曲张套扎术(EVL)治疗,其他采取硬化剂注射、EVL联合组织胶注射、EVL联合硬化剂和组织胶注射各1例;术后发生不良反应7例;随访8例患者(31.0±28.5)个月,近期再出血1例,远期再出血5例。在7例全程随访患者中,择期行脾切除术者1例,脾切除术联合贲门周围血管离断术2例,全因病死率为42.9%。结论对于SEVB患者多采用EVL治疗,即时止血效果好,但远期预后仍差。术后需联合其他方法治疗以长期控制门脉高压症,降低远期再出血和死亡风险。 | 季雪纯 金世柱 Nepal Narayan 李宁 杨宁宁 张思佳 林秋池 陈浩源 | 2022 | 实用肝脏病杂志2022，25，4： | 2 |
| 10 | Matching product architecture with supply chain design 显示文摘 | NEPAL B MONPLAISIR L FAMUY1WA O | 2012 | European Journal of Operational Research2012，216，： | 1 |
| 11 | 考虑浆体黏度的泥石流流速计算方法显示文摘泥石流浆体黏度通过影响泥石流内、外部的阻力特征影响泥石流的糙率系数,泥石流糙率系数与浆体黏度之间的关系还没有基于观测数据的定量表述。通过对云南东川蒋家沟泥石流观测资料的分析,研究泥石流糙率系数与浆体黏度之间的关系,并通过回归分析得到考虑浆体黏度的泥石流糙率系数计算公式,最后基于此构建了考虑浆体黏度的泥石流流速计算公式。结果表明,随着泥石流浆体黏度的增加,泥石流糙率系数逐渐增加,浆体黏度在宏观上表现为增阻作用,考虑浆体黏度的泥石流流速计算公式改进了现有公式在计算浆体黏度较高的泥石流流速中的不足。研究结果可为进一步研究浆体黏度对泥石流运动阻力的影响提供参考,也为工程实践中的流速计算和增阻消能设计提供新的思路。 | 王喜安 陈剑刚 陈华勇 Nirdesh Nepal 王飞 | 2020 | 长江科学院院报2020，37，4： | 1 |
| 12 | Evaluating Local Benefits from Conservation in Nepal's Annapuma Conservation Area显示文摘 | Spiteri A Nepal S K | 2008 | Environrnental Management2008，42，3： | 1 |
| 13 | Status of environmental health in Nepal显示文摘 | Pashupati Nepal | 2006 | CNAS J2006，33，1： | 1 |
| 14 | Exciton localization in AlGaN alloys显示文摘 | Nepal N Li J Nakarmi M L | 2006 | Appl Phys Lett2006，88，06： | 1 |
| 15 | Ubiquitin specific protease 2 acts as akey modulator for the regulation of cell cycle by adiponectin and leptinin cancer cells显示文摘 | Nepal S Shrestha A Park PH | 2015 | Molecular and cellular endocrinology2015，412，5： | 1 |
| 16 | Tourism-induced rural energy consumption in the Annapurna region of Nepal显示文摘 | Nepal S K | 2008 | Tourism Management2008，29，1： | 1 |
| 17 | Tourism and tourism and rural settlements-Nepal's Annapurna Region 显示文摘 | NEPAL S K | 2007 | Annals of Tourism Research2007，34，4： | 1 |
| 18 | Involving Indigenous Peoples in Protected Area Management: Comparative Perspectives from Nepal, Thailand, and China 显示文摘 | Nepal S K | 2002 | Environmental Management2002，30，6： | 1 |
| 19 | Dynamic modeling for construction innovation显示文摘 | PARK M NEPAL M P DULAIMI M F | 2004 | Journal of Management in Engineering2004，，20： | 1 |
| 20 | Dynamic modeling for construction innovation 显示文摘 | Moonseo Park Madhav Prasad Nepal and Mohammed Fadhil Dulaimi | 2004 | Journal of Management in Engineering2004，20，4： | 1 |
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