Research Digest 2009The role of groundwater is very important in the management of water resources with increasing demand. The proper evaluation of groundwater resources that requires

Research Digest 2009

1

Dear respected NEA-JC members, we feel proud and happy to put this issue of Research Digest of Nepal Engineers’ Association-Japan Center. Nepalese engineers in Japan are involved with research activities in many disciplines of science and engineering. There is no doubt that NEA-JC can boast itself as an active research community. There was a need to have some platform for collecting and sharing the research accomplishments among NEA-JC members ourselves and with other institutions. So NEA-JC started publishing a yearly Research Digest from last year. As engineering profession is getting more and more cross-disciplinary we hope that this digest will even be helpful in determining some new research themes. ..........................................

Finally, I thank members of the Publication Committee for their effort and dedication in materializing this issue. …………………………………………...

Message from the President


2

Message from the Publication CommitteeDear Readers,

It is our pleasure to compile this issue of research digest as a continuation of similar practice by the previous publication committee. We really appreciated the past research digest and found it very useful as a database to let everyone know about research work in Japanese institutes. With this experience, we have attempted to collect as many research abstracts as possible from our respected researchers at various institutes in Japan. There are varieties of research conducted under several disciplines and hope this research digest will help people from each discipline to dig more about their area of interest by consulting with the respective researchers. We have included the details of each researcher to make this task easier.

We are hopeful that everyone finds this volume of research digest useful for them. Though, we must reveal that all the researches undergoing in Japanese institutes are interesting and it would be better if we can gradually cover each of them in subsequent issues of such publication. Our endeavor up to this point is very small in this respect. The other point we want to put her bluntly is the lack of enthusiasm from our researchers even to write a piece of abstract. Some tedious and repeated contacts need to be made even to put forth this small issue into this shape. However, we are really thankful to all the contributors of this issue who allocated their precious time to write about their work despite being so busy and involved in their respective research work. This will definitely help a lot to young researchers who are pursuing research in Japanese institutes and to other concerned people who give due regard to research in their career. Our sole aim is also to help these people as we believe that more we share our knowledge the more we can innovate and evolve ourselves as scholars in a long run. We think knowledge builds up and grows in this manner. Wishing all of you a successful research life.……………………………………………………………

Publication Committee

NEA JC, 2008


3

Name: Badri Bhakta Shrestha

Qualification: Doctoral Student

Current Affiliation: Kyoto University, Japan

Contact Address: Ogurisu-Nishi Complex 14-407, Nakayamada-cho, Fushimi-ku, Kyoto 601-1463

E-mail Address: [email protected]

URL (if any): http://dolakhatown.blogspot.com/

Tel. No. : 090-9115-9743

Contact Address in Nepal: Bhimeshwor M.C.-2, Doalakha

Professional Membership (Other than NEA):

Nepal Engineering Council, Japan Society of Civil Engineers, Nepal Red Cross Society

Research Interest (in brief): Numerical modeling and study on Debris Flow, Driftwood, Floods, Landslide and their countermeasures

Current Research ActivityDebris Flow with Driftwood Capturing by Open Type Check Dams

Debris flow is a rapidly moving mass of a dense mixture of sediment and water that occurs in a wide variety of environments throughout the world. In recent years much driftwood has combined with debris flow, due to heavy downpours over mountainous rivers, which result in damage of properties and loss of lives in the lower reaches of rivers. Generally the catchment area of mountainous rivers is covered by forest. In these areas, debris flow flows down along a river with driftwood. Such driftwood clogs narrows in the river course or bridge or culvert sites giving rise to flooding, bridge damage or destruction. Therefore, recent attention is required to focus on debris flow with driftwood countermeasures. Check dams are one of the effective structural countermeasures for debris flow control. Debris flow may be captured due to jamming of driftwood on an open type check dam. The main objective of the current research is development of numerical model to investigate the behavior of debris flow with driftwood and its capturing by an open type check dam with experimental verifications. A numerical simulation model for computing the behavior of debris flow with driftwood into a horizontally two-dimensional flow field is developed. The driftwood behavior of scattering in the flow field is treated as the diffusion process. The numerical simulation is carried out with an interacting combination of Eulerian expression of the debris flow fluid motion and Lagrangianexpression of the driftwood, in which the fluctuation components of position and the rotational angular velocity of the driftwood are dealt with as random variables based on the results of a statistical analysis of experimental values. Driftwood jamming on open space of check dam is evaluated based on geometric conditions and probabilistic approaches. Numerical model for computing the sediment depo s i t i on be h i nd the che ck dam d ue t o d r i f twood jamming i s a l so developed. … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … . .


4

Name: Sanjay Kumar Jha

Qualification: Doctoral student

Current Affiliation: Saitama University

Contact Address: Department of Civil and Environmental Engineering, Saitama University, Saitama 338-8570, Japan


URL (if any):

Tel. No. : 090 1806 5739

Contact Address in Nepal: GPO Box No. 23295, Kathmandu, Nepal


Nepal Geotechnical Society, ASCE Geo-Institute (Student member)

Research Interest (in brief): Soil liquefaction, Finite Element Method, Constitutive Model, Probabilistic geotechnics

Current Research Activity

Reliability analysis of soil liquefaction using analytical and numerical methods.

Soil liquefaction during earthquakes may cause a severe damage to the existing structures and thus a liquefaction analysis and its remediation is necessary before constructing any structures. In my research, an analysis based on standard penetration test (this test is also common in Nepal for collecting and analyzing soil samples from bore log) is performed and a reliability analysis is done to include the effects of different sources of uncertainties. A reliability based design safety factor is proposed for routine liquefaction design works. …………………………………………………………………

Finite element method (FEM) is a powerful and most widely used tool for geotechnical analysis (including liquefaction). While computing the stress and deformation using a FEM, a constitutive model is used and the parameters are generally determined from laboratory sample tests. Due to soil variability and parameters uncertainties, the output of FEM may not be reliable if deterministic inputs are used. The uncertainty in stress deformation characteristics of soil due to soil variability and parameters uncertainties are analyzed using simple probabilistic tools and the scope of inclusion of variability in parameters for FEM analysis are explored. …………………………………………………


5

Name: Ripendra Awal

Qualification: Ph. D. (Civil and Earth Resources Eng.)

Current Affiliation: Research Associate, DPRI, Kyoto University.

Contact Address: Mukaijima Gakusei Center, Room No: 1316, 104-1 Takabacho, Mukaijima, Fushimiku, Kyoto, 612-8133


Tel. No.: 090-9115-9748

Contact Address in Nepal:

Tekhacho Tole, Ward No: 16, Bhaktapur Municipality


Nepal Engineering Council (NEC), International Association of Hydraulic Engineering and Research (IAHR), International Association of Hydrological Sciences (IAHS), Japan Society of Civil Engineers (JSCE)

Research Interest (in brief):

Water resources, water induced hazards (Flood, landslide, debris flow, river bank erosion), natural dam failure, embankment breach, GIS, RS


PREDICTION OF FLOOD/SEDIMENT DISASTER CAUSED BY FORMATION AND FAILURE OF NATURAL DAM

Among many natural dams, the failure of moraine dams and landslide dams are most dangerous. The formation and failure of these dams and lakes are linked with different triggering factors, i.e. earthquake, heavy precipitation and snow melting etc. Global climate change is accelerating the triggering factors like snow melting and increasing frequency and magnitude of extreme rainfall. Glacial Lakes Outburst Flood (GLOF) is the one of the main cause of flash flood in the Hindu Kush-Himalayan region. As GLOFs and Landslide Dam Outburst Flood (LDOF) pose severe threats to humans and man-made structures, it is important to make accurate estimates of the likely magnitude of potential floods. Therefore, proper hazard assessment studies must be carried out in potentially problematic basins to evaluate the likely economic loss and the most appropriate method of mitigation activities. ……………………………………………………………………..

Most of the study on GLOF is focused on interpretation of satellite image to predict the potential hazardous glacial lake and very few studies are focused on analysis of downstream hazard. Prediction of the GLOF induced debris flow and downstream hazard areas are a complex procedure. Numerical model combined with GIS and RS can be used to delimiting the downstream hazardous zones. Both structural and non-structural measures can be used to reduce the hazards from moraine dam failures and GLOFs. Identification of areas that are most susceptible to potential GLOF events will help to mitigate the hazard of future potential GLOF. Awareness of the possibility of such an event will allow precautions and hazard mitigation measures to be taken in advance. The development and application of integrated model to predict failure modes of moraine dam, resulting outflow hydrograph, flood routing, prediction/delineation hazard prone area, refuges and evacuation routes in the downstream to evacuate local residents in a safe and proper manner in the event of floods is essential. Such type of model can be used to carry out a multi-scenario modeling of moraine dam failure to predict potential water/sediment hazards, risks and their mitigation in the downstream river reach.


6

Name: Vishnu Prasad Pandey

Qualification: M. Eng. (Water Engineering & Management)

Current Affiliation: PhD Student, University of Yamanashi, Kofu, Japan

Contact Address: 4-3-11, Takeda, Kofu, Yamanashi 400-8511, Japan


URL (if any):

Tel. No. : 080-6751-6443

Contact Address in Nepal: Dangmai, Madanpur-6, Nuwakot District, Nepal


Nepal Engineering Council, American Geophysics Union (AGU), Society of Environment Science – Japan, International Water Association (IWA).

Research Interest (in brief):Groundwater & surface water modeling, climate change and water resource,

vulnerability analysis and adaptive management, GIS, IWRM.


Research Title: Impact of climate and land-cover change on Kathmandu valley’s groundwater resources.

The role of groundwater is very important in the management of water resources with increasing demand. The proper evaluation of groundwater resources that requires through hydrologic, geologic and hydraulic investigation; is needed in this regards. Groundwater models are often used to simulate the flow of water in aquifer and when calibrated may be used to predict future performance under prescribed operating conditions and continuous stresses such as climate change. …………………………………………………………………

In case of Kathmandu valley, groundwater extraction is already exceeding the recharge. However, haphazard pumping is continued in the absence of institutional responsibility to monitor and manage the groundwater resources. This situation should no longer exist and management intervention be imposed to protect the groundwater environment. But, there is lack of scientific knowledgebase to suggest management intervention. This study attempts to develop such knowledgebase by means of analyzing current situation of the groundwater environment under DPSIR framework, modeling the aquifer conditions to understand the flow pattern and then predicting the future conditions under a set of scenarios related to climate and land-cover change. Finally, suitable set of management options would be suggested based on result of the scenario analysis.


7

Name: Ved Prasad Kafle

Qualification: PhD

Current Affiliation: NICT

Contact Address: 4-5-13-202, Hikonari, Misato-shi, Saitama-ken 341-0003


URL (if any): www.vedkafle.org.np

Tel. No. (its up to you): 080-5034-9836

Contact Address in Nepal: Babiya-3 Sunsari


NEC, IEEE, IEICE

Research Interest (in brief): Future Internet, Internet for developing regions


Research Title: Research and development of future Internet architecture and technologies

I have been designing the architecture of a global network that would overcome the limitations of the existing Internet and telecom networks and that would be deployed around 2020 to optimally serve the future society. Specifically, I have been designing the architecture of a mobile-centric universal access system that would leverage all the existing network concepts such as multi-hop ad hoc networks, sensor networks, local area networks (LAN),personal area networks (PAN), body area networks (BAN), cellular wireless networks, and wire or fiber connected networks. The universal access system would provide pervasive network connectivity to users and devices to obtain or exchange intended information effectively. …………………………………………………………………………


8

Name: Roshan Bhakta Bhandari

Qualification: Doctoral Student

Current Affiliation: University of Kyoto, Japan

Contact Address:Disaster prevention Research Institute, DRS, Uji City, Kyoto


Tel. No.: 080-3794-3616

Contact Address in Anupam Marg, 8, PSMC, Kaski Nepal


SONA ,ASA

Research Interest (in brief):Architecture & Urban Planning, Social analysis on disaster risk reduction


Research Title : Formulating Time tested Knowledge on socio-cultural practices for sustainable disaster risk reduction

With the subsequent failure of technocratic approach in disaster risk reduction in the past greater emphasis is given on people-centered risk reduction measures. The research objective is to explore the cultural dimensions that contributes in risk reduction and is more focused on social attributes that assists in disaster risk reduction in general and seismic disaster in particular. Disaster reduction measure focuses on pre disaster management activities like disaster preparedness and mitigation activities. Such practices are inherent in the way of life of people and it is very important to build the current disaster reduction measures on the existing strength of communities which are located within their socio-cultural life. Utilizing the community strength and scaling it up to cater the safety needs of people in a sustainable manner is the desired implication of this study.


9

Name: Bidur Ghimire

Qualification: Doctoral Scholar

Current Affiliation: Kyoto University

Contact Address: River System Engineering and Management Laboratory,Civil Engineering Department, Kyoto University

E-mail: [email protected]

Affiliation in Nepal: Kathmandu Engineering College

Contact Address in Nepal: Kathmandu Engineering College, Kalimati.

Research Interests: Numerical modeling of multiphase flow, Flood forecastingand simulation, Water disaster management.

Current Research ActivityFormulation of Integral Model and Numerical Simulation for the unsteady free surface flows inside

porous media under various inlet conditions

In this study, we derive an integral model formulation with the similarity transformation to solve self-similar problems describing the unsteady free-surface flow of water intrusion into the porous media for two different inflow conditions namely pressure boundary and flux boundary at the inlet. A class of new ordinary differential equations are obtained and solved by analytical methods for the assumed similarity distributions of depth, velocity and front position. It is pointed out that there are two distinct power law regimes with respect to time in the unsteady intrusion process. These two flow regimes are named as Inertia-Pressure (IP) and Pressure-Drag (PD) regimes. The integral models derived represent both IP and PD regimes effectively; where early IP regime is followed by PD regime. The analysis indicates that the integral model clearly represents this nonlinear flow behavior in the porous media. We also made vertical 2D numerical simulations for the free surface flow inside the porous media governed by a set of Navier-Stokes equations extended for porous media flow. The Finite volume method is applied using constrained interpolated propagation (CIP) method and highly simplified marker and cell (HSMAC) type pressure solver for the numerical solution. The evolution of moving free surface is governed by volume of fluid (VOF) method inside porous media. To prevent the spurious oscillation and generate diffusion-free sharp interface, a third order MUSCL-type total variation diminishing (TVD) schemes is used to discretize the convective terms in VOF convection equation. The results of analytical integral models were compared with the results of numerical simulation and hydraulic experiments. The close agreement in the results proves the applicability of the formulation and also the algorithm used proves to be a promising tool for the numerical simulation of unsteady free surface flow through porous media. …………………………….Key words: porous media, transient free-surface flow, similarity solution, integral model, CIP method, VOF method. …………………………………………………………………………………………………


10

mailto:[email protected]

Name: Bhoj Raj Pantha

Qualification: PhD in Engineering

Current Affiliation: KEI, Ginza, Tokyo

Contact Address: Saitama Prefecture, Kawaguchi City, Shiba 3-6-11Dai 2 Horishiro Mansion 401, Japan


Contact Address in Nepal: Ghansikuwa-3, Tanahun, Nepal

Research Interest (in brief):

Transport Planning, Highway Alignment Optimization, Highway Maintenance, Landslide and Slope Failures, Application of GIS inTransportation Engineering


Roadway Route Optimization and Highway Maintenance Prioritization Models Incorporating Landslide Susceptibility

Road construction and maintenance in the Himalayan regions are difficult and costly because of rugged topography and fragile geology. Because of rugged topography and fragile geology various types of natural disasters including landslides, slope failures, floods, and earthquakes are very common in the Himalayan regions. Roadside slope failure along roads is a common problem in the Himalayan regions as road construction activities disturb naturally formed slope. Realizing this fact an attempt to incorporate slope failure susceptibility conditions in highway alignment optimization model and integrated highway maintenance prioritization model is done in our research work. ……………………………………………………………………………….

Both models were developed in Geographic Information Systems (GIS) environment. Roadway optimization model was developed taking a case study of Kathmandu – Hetauda section of Nepal considering various cost components and output was compared with previous studies conducted by various national and international agencies. Similarly, integrated highway maintenance model was developed taking a case study of Prithvi and Mugling – Narayanghat highways considering pavement condition and roadside slope failure susceptibility condition as maintenance components. These two models are developed based on real-world data from the central Nepal. We hope, the methodologies that we developed in these studies are equally applicable in the similar geological and geomorphological areas. …………………………………………………………


11


Name: Kshitij Charana Shrestha

Qualification: M. Sc. in Structural Engineering

Current Affiliation: Kyoto University (Doctoral Student)

Contact Address:615-8144 Kyoto shi nishikyoku katagihara kuginuki 25-1 katagihara

shieijyutaku 4-302


Tel. No. : 090-6552-5456

Contact Address in Nepal: 76-Panchashil marg, maitidevi, kathmandu, nepal

Research Interest (in brief):Retrofitting techniques


Experimental and numerical study for seismic retrofitting of historical masonry structures

Un-reinforced masonry walls are very much vulnerable to earthquake excitation; hence proper retrofitting measures need to be performed for their safety against possible future earthquakes. My research concentrates on experimental and numerical study for the in-plane shear behavior of un-reinforced and reinforced masonry walls inserting stainless pins. The retrofitting procedure, where stainless pins are inserted into the masonry walls using epoxy resin for proper bond between pins and masonry components, seems to work pretty well in both aspects providing proper strengthening without substantial changes in the original appearance of the structure. ……………………………


12

Name: Yadu Nath Pokhrel

Qualification: ME, PhD Candidate

Current Affiliation: University of Tokyo, Japan

Contact Address: Institute of Industrial ScienceBe607, Meguro-Ku, Komaba, Tokyo


Tel. No.: 050-3424-5702

Contact Address in Nepal: N/A

Professional Membership (Other than NEA): ASCE, JSCE

Research Interest (in brief): Climate change, Global hydrological cycle,Water resources availability


Title : Human impact on global water resources availability

The main objective of my study is to examine the impact of climate change on global fresh water availability. To investigate the impact of climate change, global river discharge is simulated for 20th and 21st century and individual effect of land use change, change in precipitation (climate), construction of reservoirs etc. is examined. Future projection of river discharge is based on the climate change projection defined by a number of Climate Models. …………………………………………………………………….


13

Name: Rojee Pradhananga

Qualification: M. E. in Transportation Engineering

Current Affiliation: Kyoto University (Doctoral Student)

Contact Address: ╤ 615-8144 Kyoto shi Nishikyoku Katagihara Kuginuki 25-1 Katagihara Shieijyutaku 4-302


URL (if any):

Tel. No. : 080-3813-1456

Contact Address in Nepal: 76-Panchashil Marg, Maitidevi, Kathmandu, Nepal


Research Interest (in brief): Transport Logistics, Traffic Safety, Hazardous Material


Research Title: Multi-objective Optimization for Routing and Scheduling of Hazardous Material

While substantial economic growth is a direct outcome of industrialization, accomplishment of the process is directly related with the use of huge quantity of hazardous material (HAZMAT). Consequently, reliance on HAZMAT has become a fact of life to the people living in industrialized societies and thousands of different HAZMATs are in use at present. Huge demands of hazardous material, their subsequent shipments and the potential adverse conditions related with such shipments are the main problems in hazardous material transportation. The focus is to contribute to safety in transportation providing proper routing and scheduling plans for fleet of vehicles carrying HAZMAT yet satisfying the suppliers’ need of minimizing cost of transportation. Thus the target is to come up with a proper formulation to HAZMAT vehicle routing problem considering multiple objectives of various stakeholders involved in the transportation process and to develop an Ant Colony System (ACS) based meta-heuristic algorithm to solve it for optimal case. ……………………………………………………………………………………………..


14

Name: Bijay Giri

Qualification: Ph D

Current Affiliation: Hokkaido University

Contact Address:

Laboratory of Biomechanical DesignDivision of Human Mechanical Systems and DesignGraduate School of EngineeringHokkaido University


URL (if any):

Current Research Activities

Research Title: Microscopic Deformation and Structural Anisotropy in Bovine Cortical Bone

Bone is a highly strong and tough material having different hierarchies of structures. The nanoscale deformation governed by the two-phase structure of collagen-mineral composite has received increased attention by the scientific community. The mechanical loading would affect the material bone differently in different hierarchies. The deformation of bone as a whole is not only controlled by the collagen fibrils characteristics, but the response of mineral particles is also equally important. The apatite crystals in bone grow with a specific crystalline orientation, hence the anisotropy and orientation dependent deformation plays crucial role in determining its deformation characteristics. In this regard, the current work is aimed to address the microscopic deformation and structural characteristics in cortical bone by considering crystallites deformation in relation to their orientation distribution and organization by using X-ray diffraction procedures. A direct quantitative comparison of microscopic deformation characteristics of bone is presented on the basis of experimental revelation of mineralized crystallites deformation and orientation distribution using nondestructive and noninvasive X-ray diffraction methods. The overall structural and deformation of bone are observed to depend on the nanoscale level deformation characteristics. ………………

Bone mechanics is the important branch of biomechanics, where material properties, structure, adaptation, mechanical behavior with loads, and other issues related to bone are involved. New developments in this area will have potential benefits providing the transfer of methodology to the mechanics of other engineering materials for optimal structure or material design. The results obtained in this research are expected to provide new insights on the prevailing issues of bone fractures and risks and contribute in the medical science field by providing better assessment of various diseases and current therapies. The information obtained herein aid in the development of novel bio-inspired and nano-composite materials. The current work is also a step forward towards our aim of devising methodologies and developing useful techniques that could be ultimately applied with living bone tissues in clinical practice making use of weaker X-rays. …………………………………………………………………………


15

16

Name: Netra Gyanwali

Qualification: Ph D student

Current Affiliation: Kyoto University


Research Title:Operation and Management for a Stand-Alone Hybrid System with Wind Generator/Fuel Cell/Ultra capacitor

Rising environmental concern, recent advances in power electronics and control technology, liberal electric market policy and increased awareness toward sustainable energy solution are gearing to proliferate renewable power in electric power industry. Among the renewable power sources, wind power is the most rapidly growing due to its matured, efficient and state-of-art technology with short installation time. At the end of 2007, world wide nameplate capacity of wind-powered generators was 94.1 GW, which is fivefold global growth between 2000 and 2007. In several countries it has achieved relatively high levels of penetration, accounting for approximately 19% of electricity production in Denmark, 9% in Spain and Portugal, and 6% in Germany and the Republic of Irelandin 2007. However, to exploit available wind power optimally, there are many challenges to address. One of the prominent issues is the intermittent nature of the generated power due to ever changing nature of wind velocity. Because of this reason, the wind power alone cannot provide the varying load demand in stand-alone mode, and often create instability, voltage flicker and sporadic tripping problem to the upstream power network in grid connected mode. In either case, the need of reliable storage system is inevitable. The storage system in renewable power system has multiple applications; (i) long term storage for energy management, (ii) medium term storage for frequency regulation and peak shaving, and (iii) short-term/buffer application for power balance and power smoothening.The choice of storage system may be decided by the cost and the mode of operations. For instances, in grid connected mode buffer storage is sufficient since the available power is directly fed to the system. However for stand-alone mode, long term and buffer storage are fundamentally required.For stand-alone or islanded micro-grid with wind power generator (WPG), hydrogen/fuel-cell (H2/FC) and battery system as main storage and buffer storage respectively, has been favored very often. Such a system can offer stable active and reactive power balance, voltage and frequency regulation, and also makes the stand-alone/microgrid system as dispatchable entity when looking from the grid. Management and control scheme of hybrid system with battery as buffer storage can be found in. Although the battery offers matured and cost effective technology for buffer storage, the frequent charging and discharging considerably reduces its life and often causesthe pollution in its disposal stage. Because of these reasons, ultracapacitor (UC) has become competitive to the battery for buffer

storage with its added benefit of high efficiency and high power density, thereby having bright prospective in both portable and stand-alone power system. There are many research papers discussing the H2/FC as main and UC as buffer storage in hybrid powergeneration system. In these papers, the UC is connected in regulated dc bus via bi-directional dc/dc converter, whereas WPG is mainly

linked with FC by dc coupling. The main problem with these configurations is the less degree of freedom in control strategy, as the dc-dc converter has under the stress of two control variables (dc voltage and the UC voltage/charge). Further, such configurations lack the well defined terminal voltage and frequency regulation, especially in ac-linked hybrid system. My research focuses on addressing these issues by introducing an alternative design and control scheme for a stand-alone hybrid system containing WPG, FC and UC system. WPG system is operated in maximum power point tracking (MPPT) mode which enables to extract optimum available power from the wind, whereas FC is operated to supply the deficit power in long term and steady state conditions. The UC is responsible for the transient load mitigation of the system during rapid load changing and fault. In this case, the UC is connected to the variable dc bus without bi-directional converter thus relaxing the system with additional burden of the converter and controller associated with UC interface. Additionally, it is compatible with the ac interfaces and can provide effective ac voltage and frequency regulation without requiring communication lines. The dynamic models of each components are first be developed using matlab/simulink domain which allows to design and size the hybrid system for a variety of loading and environmental conditions and he simulation be performed to validate the applicability the scheme in real time.


Name: Krishna Prasad Dulal

Qualification: Master in Hydraulics

Current Affiliation: Hokkaido University, Japan

Contact Address: N23, W4, Hokkaido, Japan.


URL (if any): http://kpdulal.googlepages.com

Contact Address in Nepal:Sushil bhairab tole, Katunje 2, Bhaktapur


Nepal Engineering CouncilStudent member of American society of civil engineers

Research Interest River Behavior, Hydraulics, Hydropower and Energy.


Research Title: Role of cohesion in the meandering channel development.

River meandering is the great concern for the researches since long time. All the past studies on meandering were based on the hydraulics of the river as well as the sediment transport. This study is based on the approach to define meandering channel on the behavior of bank sediment composition and the development of stress on it. Recently conducted experiment shows that the cohesion content on the bank plays vital role to change the river plan forms. Different plan form as straight, meandering and braiding can be obtained from the river with same hydraulic condition but by varying the sediment bank composition. The main process as erosion, deposition, transportation and consolidation acts on the Hysteresis phenomena due to cohesive content of the banks.

17

Additional Research List(this section includes only research interest or research titleswhose abstracts were not submitted)

S.N.

Name Qualification Current affiliation Research interest / title

1 Sudip Adhikari Ph. D. Postdoctoral Researcher, Nagoya Japan

Synthesis of thin films, Amorphous carbon, Carbon nano tubes, Semiconductor, Photovoltaic solar cell.Current research: Carbon-based photovoltaic solar cells

2 ParameshorPokharel

Ph.D. Chubu University Numerical modeling and study of urban water disaster, global warming, and Climate change

3 Basanta Kumar Gautam

Ph.D. Private Limited STEM

Power Systems, Transmission lines, Outdoor Insulation, Contamination Flashover Performance of Porcelain and Polymer Insulators, Ageing of Polymer Insulators

We wish all the best for all of our

members for their outstanding research

achievements for their current and future

research activities .Publication Committee


18

Research Digest 2009The role of groundwater is very important in the management of water resources with increasing demand. The proper evaluation of groundwater resources that requires

Documents