http://suspace.su.edu.bd/handle/123456789/59 Sat, 18 Apr 2026 14:13:08 GMT 2026-04-18T14:13:08Z http://suspace.su.edu.bd/handle/123456789/84 Present Status and Potential Locations of Open Spaces in the Dhaka City Corporation Area: Using GIS Technology Hoq, Kazi Md. Obaydul TheJirst planfor the Dhaka cil was prepared in l959.Later Dhaka Metropolitan Development Plan (DMDP) was approved in 1997, and pravided the planning policv guidelinefor Dhaka. Open space is the lungs oJ-any ciQ. It is alread.v- recognized that Dhaka has lack of open space which has negative impact on public health, ecolopy and socieQ. Many problem,s have been found during deal and conyersation v,ith concernecl authority to manage this open space properly. In managing the parks and playgrounds tlte concerned authorities are often confronted with insfficient finance and shortage of trained personnel. There is also lack oJ proper co-ordination amottg organizations and institutions ancl Ltsers respotlsible .for the eJfective operation and maintenance of these open spaces. In this study, an invetiot'v o.l'existitg open spaces is preparedfrom GIS data andfield obsenation. Related data oJ evety existirtg open space is collected to prepare a GIS based database. Statistical and spatial analvsis is perfbrmed to derive the status oJ open spaces based on dffirent parameters. Opinions have been collected from a wide varieQ of people such as users, tlotlLtsers ancl experts to identif' problems related to open space creation, management cmd maintenance. The presertt investigation also reveals that the enhancement of the use oJ' diJJbrent neighborhood, intermediate and large-scale parks & playground in Dhaka City Corporation area tould require adequate sec:urity, better maintenance and elJicient management, landscape development and treatment, various J'acilities for children. At present the securitv- and better maintenance are required to improve the number of increasing visits of the people. Wed, 15 Jun 2016 00:00:00 GMT http://suspace.su.edu.bd/handle/123456789/84 2016-06-15T00:00:00Z http://suspace.su.edu.bd/handle/123456789/83 Effect of Moving Surface on Aerodynamic Characteristics in NACA0012 Airfoil Islam, Md. Sadiqui; Hakim, Shaik Merkafur; Ali, Mohammad This study focuses on the elfects of moving surface on aerodynamics cltaracteristics in I{ACA 0012 airfbil through numerical simulation. Ty,o particular cases are considered: (i) Single moving iur/ace (ii) Doubte moving surJace. Wen 'single moving surfoce' is considered, onll one nnving surface of l0% of the chortl length(c) is placed at upper surface of the airfoil starting/rim 0.05c to 0.15c. Wen 'double moving surface' is considered, one moving surfoce of 1 0% of the chorcl length is placed at upper surface at position starting from 0.05c to 0 l 5c antl the other moving surface of sarne size is placed at lower surface at same positiott. Momentum injection into the flow .field moves the point of boundary layer separation in the vicinie of trailing edge o.f the airfoil. By momentum injection through single moving sudace with the surface velocity tw,ice the .free stream velocity and.for dffirent angle of attack, it is possible to reduce the average drag coefficient by 23.9%, compared with no moving surface. -For the same condition with double moving surface, it is possible to reduce the average dt'ag coeficient by 25.9%. For using moving surface, boundary-layer separation is delayed along thi chord length on the upper sudace of the airfoil. The value of lift coelficient increases slightly for moving surface. For single and double moving surface, averdge increment of lift to drag ratio qre 37.3% and 410% respectively. Wed, 15 Jun 2016 00:00:00 GMT http://suspace.su.edu.bd/handle/123456789/83 2016-06-15T00:00:00Z http://suspace.su.edu.bd/handle/123456789/75 SNR Estimation Technique of the AWGN Channel by Second and Fourth-Order Moments (fufrMt) Rahman, Md. Habibur The goal is to Jind the "best" estimate of the SI{R in a digital receiver with the lea.st cost. Generalll,, SNR estimates are generated by averaging obser,*able properties o.f the received signal over a number o.f symbols. The performances of various signal-to-noise ratio (SNR) estimation techniques reported in the literatttre are compared to identify the "best" estimator. The SlrlR estimators are investigated b.v the computer simulation of baseband binary phase shift keying (PSK) signals in real additive white Gaussian noise (A't4rcl'{) and baseband M-ary PSK signals in complex Additive white Gaussian noise (AWGI'|). Some known estimator structltres are modified to perform better on the channel of interest. lt investigates, therefore, both types of estimators and quantifies by example the improvement in performance achievable by using known data rather than error-corruptecl recovered data. Estimator structures for cotnplex channels are examined. Wed, 15 Jun 2016 00:00:00 GMT http://suspace.su.edu.bd/handle/123456789/75 2016-06-15T00:00:00Z http://suspace.su.edu.bd/handle/123456789/74 The Influence of Balance of Payments and Balance of Trade on Exchange Rate in Developing Countries of Asia: A Case Study of Bangladesh, Pakistan and lndia Rashidin, Md. Salamun; Ullah, Irfan; Jehangir, Mahad The exchange rate is a main dynamic of balance of payment. The balance of payment is bookkeeping of all the transactions made in home ancl foreign. If exchange rate oJ'a home coutltt? represents a weaker currency it will have positively aJfect the on the balance of paymenL A stronger home currency will result deficit balance of payment. Imports of Capital goods and export of primary goods i.e. case o.f developing countries, it will negative elfect on balance of payment. This ,study was conducted to check the relationship among exports, import, copital goods, consttmption, m.onufacturing, oil prices, balance of trade and exchange rate, balance of payment. In the perspective of developing economies of Pakistan, India and Bangladesh. It was found that this relationship was dffirent in above mentioned countries i.e. in case of Bangladesh the predictor and response variable shows the strong positive regression relation while in case of rest of the economies there was dffirent result. Some of predictors shows weaker regres sion relationship of variables. Wed, 15 Jun 2016 00:00:00 GMT http://suspace.su.edu.bd/handle/123456789/74 2016-06-15T00:00:00Z