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Coastal Erosion Problem, Modelling and Protection
Nihal Yılmaz,Lale Balas,Asu İnan 한국해양과학기술원 2015 Ocean science journal Vol.50 No.3
Göksu Delta, located in the south of Silifke County of Mersin on the coastal plain formed by Göksu River, is one of the Specially Protected Areas in Turkey. Along the coastal area of the Delta, coastline changes at significant rates are observed, concentrating especially at four regions; headland of İncekum, coast of Paradeniz Lagoon, river mouth of Göksu and coast of Altınkum. The coast of Paradeniz Lagoon is suffering significantly from erosion and the consequent coastal retreating problem. Therefore, the narrow barrier beach which separates Paradeniz Lagoon from the Mediterranean Sea is getting narrower, creating a risk of uniting with the sea, thus causing the disappearance of the Lagoon. The aim of this study was to understand the coastal transport processes along the coastal area of Göksu Delta to determine the coastal sediment transport rates, and accordingly, to propose solutions to prevent the loss of coastal lands in the Delta. To this end, field measurements of currents and sediment grain sizes were carried out, and wind climate, wave climate, circulation patterns and longshore sediment transport rates were numerically modeled by HYDROTAM-3D, which is a three dimensional hydrodynamic transport model. Finally, considering its special importance as an environmentally protected region, some coastal structures of gabions were proposed as solutions against the coastal erosion problems of the Delta. The effects of proposed structures on future coastline changes were also modeled, and the coastlines predicted for the year 2017 are presented and discussed in the paper.
Methoxyphenylcipro induces antitumor activity in human cancer cells
Nizar M. Mhaidat,Amjad M. Qandil,Qosay A. Al-Balas,Mohammad A. Hassan,Saied A. Jaradat,Ahmad M. Matalkah,Rick T. Thorne 대한약학회 2013 Archives of Pharmacal Research Vol.36 No.8
To examine the antitumor activity of a newderivative of ciprofloxacin called methoxyphenylcipro(CMPP). Cell viability was assessed using the MTT assayand apoptotic cells and reactive oxygen species wereevaluated using flow cytometry. Results revealed thatCMPP induces antiproliferative activity against breastcancer cells and melanoma and to a lesser extent againstcolorectal cancer cells. Interestingly, compared to ciprofloxacin,CMPP-induced a selective cytotoxicity againsthuman cancer cells but not human normal fibroblasts. Thepotential of CMPP to inhibit cellular growth in MD-MB-486 breast cancer cells and MV3 melanoma cells waslargely due to induction of caspase-dependent apoptosis, asconfirmed by caspase-3 activation and cleavage of itssubstrate PARP. In addition, results indicated that CMPPinducedapoptosis is mediated by generation of reactiveoxygen species. These findings revealed that CMPP has aselective antitumor activity against cancer cells and warrantsfurther clinical evaluation.
Neural-based prediction of structural failure of multistoried RC buildings
Sirshendu Hore,Sankhadeep Chatterjee,Sarbartha Sarkar,Nilanjan Dey,Amira S. Ashour,Dana Bălas-Timar,Valentina E. Balas 국제구조공학회 2016 Structural Engineering and Mechanics, An Int'l Jou Vol.58 No.3
Various vague and unstructured problems encountered the civil engineering/ designers that persuaded by their experiences. One of these problems is the structural failure of the reinforced concrete (RC) building determination. Typically, using the traditional Limit state method is time consuming and complex in designing structures that are optimized in terms of one/many parameters. Recent research has revealed the Artificial Neural Networks potentiality in solving various real life problems. Thus, the current work employed the Multilayer Perceptron Feed-Forward Network (MLP-FFN) classifier to tackle the problem of predicting structural failure of multistoried reinforced concrete buildings via detecting the failure possibility of the multistoried RC building structure in the future. In order to evaluate the proposed method performance, a database of 257 multistoried buildings RC structures has been constructed by professional engineers, from which 150 RC structures were used. From the structural design, fifteen features have been extracted, where nine features of them have been selected to perform the classification process. Various performance measures have been calculated to evaluate the proposed model. The experimental results established satisfactory performance of the proposed model.
Interband optical properties in wide band gap group-III nitride quantum dots
Bala, K. Jaya,Peter, A. John Techno-Press 2015 Advances in nano research Vol.3 No.1
Size dependent emission properties and the interband optical transition energies in group-III nitride based quantum dots are investigated taking into account the geometrical confinement. Exciton binding energy and the optical transition energy in $Ga_{0.9}In_{0.1}N$/GaN and $Al_{0.395}In_{0.605}N$/AlN quantum dots are studied. The largest intersubband transition energies of electron and heavy hole with the consideration of geometrical confinement are brought out. The interband optical transition energies in the quantum dots are studied. The exciton oscillator strength as a function of dot radius in the quantum dots is computed. The interband optical absorption coefficients in GaInN/GaN and AlInN/AlN quantum dots, for the constant radius, are investigated. The result shows that the largest intersubband energy of 41% (10%) enhancement has been observed when the size of the dot radius is reduced from $50{\AA}$ to $25{\AA}$ of $Ga_{0.9}In_{0.1}N$/GaN ($Al_{0.395}In_{0.605}N$/AlN) quantum dot.
Bala Susmita,Reddy P. Soni,Mondal Rahul,Sarkar Partha Pratim,Sarkar Sushanta 한국전자파학회 2022 Journal of Electromagnetic Engineering and Science Vol.22 No.3
A novel design for the planar monopole antenna presented in this article consists of a patch resembling a tree and a modified ground plane resembling a flower vase. The proposed antenna is planned, designed, and made by utilizing FR4 substrate. The proposed antenna contributes to a computer simulation and tested S11 bandwidth of 9.4 GHz (144.62%) and 9.3 GHz (136.76%), respectively. A peak tested gain of 6.5 dBi and peak efficiency of 77.51% have been achieved. The measured results of the fabricated antenna are compared with the simulated results and are found to be in good agreement. The proposed antenna has a low general volume of 38 × 20 × 1.6 mm<sup>3</sup> . The antenna can be used in C-band and X-band application.
Crafting Child-friendly Cities: Evidence from Biratnagar Sub-metropolitan City, Eastern Nepal
Bala Raju Nikku,Ruja Pokhrel 한국사회복지학회 2013 Asian Social Work and Policy Review Vol.7 No.2
Our cities are increasingly becoming the sites where children socialize, observe, and learn how societyfunctions and many local and global activities have impacted children’s health and well-being. The Child-friendly Cities initiative, launched by the United Nations Children’s Fund and theUnited Nations Human Settlements Programme in 1996, draws in diverse stakeholders to placechildren at the center of the urban agenda. Based on social work research, this article analyzes theacclaimed status of Biratnagar Sub-metropolitan city, Eastern Nepal, as a child-friendly city. Despite its efforts, the city of Biratnagar is yet to meet the required criteria to claim itself as a childfriendlycity. Further improvements by the city administration in achieving children’s participationin decision-making, child-friendly legal environment, and code of conduct are essential. Based onthe evidence, the authors advocate for bottom-up approaches that include children’s voices andtheir real participation in city governance and a strong political will to craft child-friendly cities,not as a policy rhetoric but for real. Enabling children to fulfill their potential as equal participantsin crafting child-friendly cities will require adults to relinquish some of their hegemonic powers ofdecision-making on behalf of children.
Observation ofX(3872)inB→X(3872)Kπdecays
Bala, A.,Bhardwaj, V.,Trabelsi, K.,Singh, J. B.,Abdesselam, A.,Adachi, I.,Aihara, H.,Arinstein, K.,Asner, D. M.,Aulchenko, V.,Aushev, T.,Ayad, R.,Aziz, T.,Bahinipati, S.,Bakich, A. M.,Bansal, V.,Barbe American Physical Society 2015 PHYSICAL REVIEW D - Vol.91 No.5
Bala Krishna Juluri,Wu Lin,Lennie E N Lim 한국정밀공학회 2007 International Journal of Precision Engineering and Vol.8 No.4
Existing long range piezoelectric motors with friction based transmission mechanisms are limited by the axial load capacity. To overcome this problem. a new linear piezoelectric motor using one piezoelectric actuator combined with a novel stepping mechanism is reported in this paper. To obtain both long range and fine accuracy, dual positioning control strategy consisting of coarse positioning and fine positioning is used. Coarse positioning is used for long travel range by accumulating motion steps obtained by piezoelectric actuator. This is followed by fine positioning where required accuracy is obtained by fine motion displacement of piezoelectric actuator. This prototype is able to provide resolution of 20 nanometers and withstand a maximum axial load of 300N. At maximum load condition, the positioner can move forward to a travel distance of 5mm at a maximum speed of 0.4 mm/sec. This design of nanopositioner can be used in applications for ultra precision positioning and grinding operations where high axial force capacity is required.
Building Social Work Education and the Profession in a Transition Country: Case of Nepal
Bala Raju Nikku 한국사회복지학회 2012 Asian Social Work and Policy Review Vol.6 No.3
Drawing on interviews and personal accounts of the author working in Nepal for the last 7 years,this paper discusses the evolution of social work education and challenges for its growth in Nepal,a country that is going through a series of transitions and is emerging from a recent decade-longarmed conflict. Due to a lack of formal recognition and commitment from state and non-stateactors, the future of social work in Nepal is in the hands of university-affiliated colleges and the fewsocial work graduates and educators. Their commitment, strategies, and passion are crucial to thesurvival and growth of social work in conflict-stricken, transition Nepal in South Asia.