Bell Labs Technical Journal最新文献_第2页

Analysis of Hybrid Cryptosystem Developed Using Blowfish and ECC with Different Key Size 不同密钥大小的河豚和ECC混合密码系统分析

Bell Labs Technical Journal Pub Date : 2019-07-01 DOI: 10.3126/tj.v1i1.27582

Suresh Timilsina, Sarmila Gautam

引用次数: 3

Optimal Route Computation for Public Transport with Minimum Travelling Time & Travel Cost: A Case Study of Pokhara City 以最短出行时间和最小出行成本为例的公共交通最优路线计算——以博卡拉市为例

Bell Labs Technical Journal Pub Date : 2019-07-01 DOI: 10.3126/tj.v1i1.27595

R. Thapa, J. Shrestha

{"title":"Optimal Route Computation for Public Transport with Minimum Travelling Time & Travel Cost: A Case Study of Pokhara City","authors":"R. Thapa, J. Shrestha","doi":"10.3126/tj.v1i1.27595","DOIUrl":"https://doi.org/10.3126/tj.v1i1.27595","url":null,"abstract":"In road networks, it is imperative to discover a shortest way to reach the final destination. When an individual is new to a place, lots of time is wasted in finding the destination. With the advancement of technology, various navigation applications have been developed for guiding private vehicles, but few are designed for public transportation. This study is solely concentrated on finding the possible shortest path in terms of minimum time and cost to reach specific destination for an individual. It requires an appropriate algorithm to search the shortest path. With the implementation of Dijkstra’s algorithm, the shortest path with respect to minimum travel time and travel cost was computed. Public transportation network of Pokhara city was taken for the case study of this research. The results of this analysis indicated that when the “time” impedance was used by the algorithm, it generated the shortest path between the origin and destination along with the path to be followed. This study formulates a framework for generating itinerary for passengers in a transit network that allows the user to find the optimal path with minimum travel time and cost.","PeriodicalId":55592,"journal":{"name":"Bell Labs Technical Journal","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90938733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Correlation between Concrete Compressive Strength and Rebound Number of River Bed and Crusher Run Coarse Aggregate in Pokhara Valley 博卡拉河谷河床及破碎机粗集料回弹数与混凝土抗压强度的相关性

Bell Labs Technical Journal Pub Date : 2019-07-01 DOI: 10.3126/tj.v1i1.27584

Tek Bahadur Katuwal

引用次数: 0

Development of Optimal Tour Time Model for Tourist Destinations in A City: Application in Pokhara City Network A市旅游目的地最优旅游时间模型的建立&在博卡拉城市网络中的应用

Bell Labs Technical Journal Pub Date : 2019-07-01 DOI: 10.3126/tj.v1i1.27585

Purushottam Baral, J. Shrestha

引用次数: 1

Analysis of Watersheds in Gandaki Province, Nepal Using QGIS 基于QGIS的尼泊尔甘达基省流域分析

Bell Labs Technical Journal Pub Date : 2019-07-01 DOI: 10.3126/tj.v1i1.27583

K. Basnet, R. Paudel, Bikash Sherchan

{"title":"Analysis of Watersheds in Gandaki Province, Nepal Using QGIS","authors":"K. Basnet, R. Paudel, Bikash Sherchan","doi":"10.3126/tj.v1i1.27583","DOIUrl":"https://doi.org/10.3126/tj.v1i1.27583","url":null,"abstract":"Gandaki province has the good potentiality of hydro-electricity generation with existing twenty-nine hydro-electricity projects. Since the Province is rich in water resources, analysis of watersheds needs to be done for management, planning and identification of water as well as natural resources. GIS offers integration of spatial and no spatial data to understand and analyze the watershed processes and helps in drawing a plan for integrated watershed development and management. The Digital Elevation Model (DEM) available on the NASA-Earth data has been taken as a primary data for morphometric analysis of watershed in Gandaki Province using QGIS. Delineation of watershed was conducted from a DEM by computing the flow direction and using it in the Watershed tool. Necessary fill sink correction was made before proceeding to delineation. A raster representing the direction of flow was created using Flow Direction tool to determine contributing area. Flow accumulation raster was created from flow direction raster using Flow Accumulation Tool. A point-based method has been used to delineate watershed for each selected point. The selected point may be an outlet, a gauge station or a dam. The annual rainfall data from ground meteorological stations has been used in QGIS to generate rainfall map for the study of rainfall pattern in the province and watersheds using IDW Interpolation method. The present research work provides some major morphometric watershed parameters like drainage area, flow length, slope, drainage density and rainfall patterns for watersheds in Gandaki Province. Furthermore, the parameters were compared among the watersheds in Kaski. The results of this study can be used as a reference for proposing infrastructures in those watersheds and it can also be used for making policy by local government authorities related to Energy, Water Resources, Irrigation, and Infrastructures.","PeriodicalId":55592,"journal":{"name":"Bell Labs Technical Journal","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82442166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Numerical Simulation of a Creeping Landslide Induced by a Snow Melt Water 融雪水诱发蠕变滑坡的数值模拟

Bell Labs Technical Journal Pub Date : 2019-07-01 DOI: 10.3126/tj.v1i1.27594

D. Bhat, A. Wakai

{"title":"Numerical Simulation of a Creeping Landslide Induced by a Snow Melt Water","authors":"D. Bhat, A. Wakai","doi":"10.3126/tj.v1i1.27594","DOIUrl":"https://doi.org/10.3126/tj.v1i1.27594","url":null,"abstract":"In this study, a finite element based numerical method has been considered to evaluate the creeping behavior of a landslide induced by snow melt water. A two-dimensional elasto-viscoplastic constitutive model was used to simulate the creeping behavior owing to groundwater level fluctuations of the Tomuro landslide of Gunma, Japan as a case study. Two new control constitutive parameters were incorporated in the numerical model for the first time to better understand the creeping behavior of a landslide induced by snow melt water. Such control constitutive parameters are estimated based on the relation between the total factor of safety, calculated by the Janbu's Simplified Method (i.e., Limit Equilibrium Method), and the field monitoring displacement rate of the Tomuro landslide of Gunma prefecture, Japan. The snowfall precipitation was also considered during the calculation of total factor of safety. Others required material parameters for landslide simulation were obtained from the field investigation and laboratory tests of the collected blocked samples. The simulation results of deformation pattern and shear strain pattern were presented and discussed to understand the creeping behaviour of the Tomuro landslide. Moreover, the predicted and measured time histories of horizontal displacement of the Tomuro landslide were compared for the validity of the proposed numerical model, and found in good agreements with each other. Therefore, it is believed that the proposed numerical method will be applicable to understand the creeping behavior of a landslide induced by snow melt water in the future and at the same time, long-term monitoring and management of such landslide will be much easier.","PeriodicalId":55592,"journal":{"name":"Bell Labs Technical Journal","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84061921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Editorial Message Vol.1(1) 社论第1卷(1)

Bell Labs Technical Journal Pub Date : 2019-07-01 DOI: 10.3126/tj.v1i1.27580

B. Bhandari

引用次数: 0

Perspectives of Existing Storm Water Drainage in Pokhara 博克拉现有雨水排水系统的展望

Bell Labs Technical Journal Pub Date : 2019-07-01 DOI: 10.3126/tj.v1i1.27597

K. Shrestha

引用次数: 1

Natural Disasters Versus Anthropogenic Activities in Nepal Himalayas: Case Study from Ghatte Khola , Myagdi 尼泊尔喜马拉雅地区的自然灾害与人为活动:以Myagdi Ghatte Khola为例

Bell Labs Technical Journal Pub Date : 2019-07-01 DOI: 10.3126/tj.v1i1.27593

N. Gurung

{"title":"Natural Disasters Versus Anthropogenic Activities in Nepal Himalayas: Case Study from Ghatte Khola , Myagdi","authors":"N. Gurung","doi":"10.3126/tj.v1i1.27593","DOIUrl":"https://doi.org/10.3126/tj.v1i1.27593","url":null,"abstract":"In the Himalayas, geo-hazards are natural events occurring more or less frequently and of a greater or lesser magnitude. But when natural hazards affect people and property, then it becomes disasters. It’s believed that natural disasters as such do not exist. Everything is just natural hazard and anything can turn into disasters due to anthropogenic activities. Thus, natural phenomenons are hazards while disasters are anthropogenic. In this regard, a case study was being conducted in the Ghatte Khola (Dana) of Myagdi District in Western Central Nepal, where in a context of growing population and haphazard construction of infrastructures, natural dynamics have turned into disasters. The Ghatte Khola is an intermittent, right bank tributary of the Kali Gandaki, which behaves occasionally as a debris flow, in relation with slope instabilities that affect its upstream catchment. The debris flows are usually triggered during heavy cloudbursts, and can cause damages and losses downstream, along the wide alluvial fan built at the tributary junction and upon which Dana village (Myagdi District) is settled. Inhabitants are aware of this ephemeral, yet threatening behaviour of the stream that may also affect the Kali Gandaki valley upstream from the confluence (Lat. 28°32'22\" N and Long. 83°39'03\" E). The Ghatte Khola is often affected by debris flows bringing sediment fluxes that are eroding its banks every year. A motor bridge was being built over Ghatte Khola near the confluence with Kali Gandaki and further, a large electric power station is being built on the right bank of Ghatte Khola. Sadly, the bridge was washed away by the flash flood in Ghattekhola on 25th May 2019. This study was focused on vulnerability of these man made infrastructures and their future on Ghatte Khola debris flow dynamics, with hazard that might occasionally transform into disaster. ","PeriodicalId":55592,"journal":{"name":"Bell Labs Technical Journal","volume":"46 46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82921143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Flood Analysis at Ramghat, Pokhara, Nepal Using HEC-RAS 基于HEC-RAS的尼泊尔博卡拉Ramghat洪水分析

Bell Labs Technical Journal Pub Date : 2019-07-01 DOI: 10.3126/tj.v1i1.27591

K. Basnet, D. Acharya

{"title":"Flood Analysis at Ramghat, Pokhara, Nepal Using HEC-RAS","authors":"K. Basnet, D. Acharya","doi":"10.3126/tj.v1i1.27591","DOIUrl":"https://doi.org/10.3126/tj.v1i1.27591","url":null,"abstract":"Flooding in Ramghat area of Pokhara, Nepal is the major problem that has to be faced every year by the people residing nearby the area. Main goal of this study was to conduct the flood analysis of Seti River in Ramghat. Catchment area of the Ramghat was calculated to be 574.56 sq. km. using ArcGIS where the area above 5000 m elevation was 52 sq. km. and area below 3000 m elevation was 356 sq. km. Precipitation data of two meteorological stations, Pokhara airport and Lumle, were used in this research for the calculation of peak discharge. PCJ method (1996) was used to estimate the peak flood and also compared with the peak flood calculated using Modified Dicken's formula, WECS/DHM method, Rational method and Sharma and Adhikari (2004) method. Peak flood values were found to be 1918 m3/s and 2336 m3/s by PCJ method for return period of 50 years and 100 years respectively. The HEC-RAS modelling was performed for these flooding situations to determine the water surface profile along the eight cross-sections of the Ramghat. Finally, the floodplain map was prepared using the topographic map and the Google Earth Map. It was found that 50 years flood in Ramghat could inundate three cemetery shades situated along the river banks. Most importantly, 100 years’ peak flood was found more vulnerable for residential buildings too. The flood plain maps prepared in this study can be used by government authorities for planning, decision making, early warning system and disaster risk management. Additionally, the rating curve was prepared for the outlet section of Ramghat that can be used to estimate the river discharge during flooding in future.","PeriodicalId":55592,"journal":{"name":"Bell Labs Technical Journal","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82689288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14