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Roy, Rahul
- Study of TFR Techniques for Chirp Parameter Estimation
Abstract Views :329 |
Authors
Source
Digital Signal Processing, Vol 5, No 1 (2013), Pagination: 33-38Abstract
Chirp parameter estimation is the topic of research interest for various years. Nowadays, chirp signals are applied in many engineering fields such as radar and passive/active sonar systems. Related to the use of chirp signals, the problem of parameter estimation of the signal has been receiving a great deal of interest. Chirps signal is a non-stationary signal whose frequency varies with the time. Ordinary Fourier transform is inefficient due to strong non-stationary characteristics of the signal. Hence special techniques are required to evaluate a chirp signal. Literature survey shows that the parameter estimation techniques are broadly categorized as Time-Frequency representation and statistical representation. In this paper we will discuss some of the Time-Frequency representation techniques like FrFT, WVD and Bowtie in detail and their respective results are further evaluated. Simulations of some of the techniques are done with respect to various parameters taken into account. Comparative study based on the simulation results is also done. All these techniques have trade-off between the accuracy and complexity. The evaluation results show FrFT has more accurate results than WVD and Bowtie in presence of noise. That is noise immunity of FrFT is much more than WVD and Bowtie. But complexity is less in WVD and Bowtie is simplest to implement.Keywords
Chirp Parameter Estimation, Time-Frequency Representation, Fractional Fourier Transform, WVD, Bowtie.
- Financing Sources and Problems of SMEs in Developing Countries:A Study Based on Khulna Region of Bangladesh
Abstract Views :444 |
PDF Views:0
Authors
Affiliations
1 Business Administration Discipline, Khulna University, BD
1 Business Administration Discipline, Khulna University, BD
Source
Journal of Entrepreneurship & Management, Vol 6, No 1 (2017), Pagination: 12-22Abstract
In pursuit of her economic development, Small and Medium Enterprises (SMEs) conquer leading positions in economy. The present study is conducted to analyse the problem of SMEs to collect fund in Khulna city. Data were collected from 100 SME units by using simple random technique. A structural questionnaire was developed to get the responses from different SME units in the country. For Bangladesh SMEs, it is assumed special significance for poverty reduction programme and potential contribution to the overall industrial and economic growth. Some of the constraints related SME financing are identified and some pointers for the future are provided through the study. Considering the importance this study has strived to identify those factors contribute the success of SMEs using causal model. Several factors were selected typically that affects the SME activities from pervious literature. Important factors were identified first using rotated components matrix later regression statistics was applied to find out which are statistically significant. The SME owners collect their fund basically from some sources such as money lenders, private banks, state owned banks, NGOs as well as specialised banks. They face various problems during the fund collection which are main focus in this study. In order to overcome the problems a few suggestions for the development of SMEs are given by the authors.
Keywords
SME Activities, Finance Khulna City, Bangladesh, Money Lenders, State-Owned Bank, Private Bank, NGO, Specialised Bank.
References
- Boone, H. N., & Boone, D. A. (2012). Analyzing Likert data. Journal of Extension, 50(2).
- Retrieved from http://www.joe.org/joe/2012april/tt2p.shtml
- Bose, T. K. (2012). Constraints of SME development in Khulna City. Masters’ Thesis Paper, University of Greewich, London.
- Bose, T. K. (2016). Critical success factors of SME internationalization. Journal of Small Business Strategy, 26(2), 87-109.
- Bose, T. K., Gain, N., & Bristy, J. F. (2015). Financing of agricultural SMEs in rural Bangladesh. Asian Research Journal of Business Management, 3(3), 47-55.
- Chowdhury, F. (2007). Customized form of Finance for SMEs. Seminar Proceedings, National SME Development Program for OIC Member Countries, FBCCI, Dhaka.
- Chowdhury, F. (2008). Factors Affecting Women Entrepreneurs Access to Finance in Bangladesh.
- Paper Presented at the Second National SME Women Entrepreneurs Conference, SME Foundation.
- Study and Experiment Analysis of the Feasibility of Partial Replacement of Industrial Waste Glass Powder as Cement in Self Compacting Concrete
Abstract Views :1091 |
PDF Views:6
Authors
Rahul Roy
1,
Pratyush Kumar
1
Affiliations
1 School of Civil and Chemical Engineering (SCALE), VIT University, Vellore, Tamil Nadu 632014, IN
1 School of Civil and Chemical Engineering (SCALE), VIT University, Vellore, Tamil Nadu 632014, IN
Source
International Journal of Technology, Vol 7, No 1 (2017), Pagination: 29-36Abstract
Cement manufacturing industry is one of the Carbon-di-oxide (CO2) emitting sources to the atmosphere. To reduce this emission the alternative material to be used in the concrete in which the glass is adopted. Glass is an economical and environmental friendly construction material. Glass is non-biodegradable material not suitable for landfill. In this paper partial replacement of cementitious material in self compacting concrete in 5%, 10%, 15%. The replacement of glass powder decreases the unit weight and porosity by decreases in water absorption. The early consumption of alkalis by glass particles helps in reduction of alkali silica reaction. The workability of concrete is determined by using slump test and the crushing strength of aggregate is determined by using impact test. Therefore, the glass powder is used to some extent can replace the cement and contribute the strength development and characteristics of durability.Keywords
Domestic Glass, Self Compacting Concrete, Alkali Silica Reaction, Workability, Carbon-Di-Oxide.References
- Fasih Ahmed Khan, Muhammad Fahab, Khan Shahzada, HarisAlam, Naveed Ali. “Utilization of waste glass powder as a partial replacement of cement in concrete‖. ISSN 2319-5347,vol.04, (2015).
- G.M. Sadiqul Islam, M.H. Rahman, NayemKazi.―Waste glass powder as partial replacement of cement for sustainable concrete practice.. (2016).
- Rakesh Sakale, Sourabh Jail, Seema Singh. “ Experimental investigation on strength of glass powder replacement by cement in concrete with different dosages”. ISSN :2277 128X, vol.05, (2015).
- Hongjian Du, Kiang Hwee Tan https://www.researchgate.net/publication/279287238. “ Waste glass powder as cement replacement in concrete”.(2014)
- Shilpa Raju, Dr.P.R.Kumar. “ Effective of using glass powder in concrete”. Volume 3, Special Issue 5 (2014)
- Veena V.Bhat, N. Bhavanishankar Rao. “Influence of glass powder on properties of concrete”. (IJETT) – Volume 16 (2014)
- Ashutosh Sherma, Ashutosh Sangamnerkar. “ Glass powder – A partial replacement of cement”.(IJCEM) Volume 1, Issue 11.(2015)
- J.M. Khatib, E.M. Negim, H.S. Sohl and N. Chileshe, “Glass Powder Utilisation in Concrete Production,” European Journal of Applied Sciences 4 (4): 173-176, 2012.
- M.N. Bajad, C.D. Modhera and A.K. Desai, “Higher Strength Concrete using Glass Powder,” Journal of Structural Engineering, Vol. 39, No. 3,August-September 2012, pp. 380-383.
- Ankur Meena and Randheer Singh Karnik, “Comparative Study of Waste Glass Powder as Pozzolanic Material in Concrete,” B. Tech. thesis, National Institute of Technology, Rourkela, 2012.
- G. Vijayakumar, H. Vishaliny, D. Govindarajulu, “Studies on Glass Powder as Partial Replacement of Cement in Concrete Production,”International Journal of Emerging Technology and Advanced Engineering, Vol. 3, Issue 2, Febraury 2013, pp. 153-157.
- M. Iqbal Malik, Muzafar Bashir, Sajad Ahmad, Tabish Tariq, Umar Chowdhary, “Study of Concrete Involving Use of Waste Glass as Partial Replacement of Fine Aggregates,” IOSR Journal of Engineering, Vol. 3, Issue 7 (July 2013), pp. 08-13.
- Ahmad Shayan “Value Added Utilization of Waste Glass in Concrete” IABSE Symposium Melbourne, 2002, p.p.1-12
- Ahmad Shayan, Aimin Xu “Performance of glass powder as a pozzolanic material in concrete: A field trial on concrete slabs” Cement and Concrete Research, 2006, Vol.36, p.p.457–468.
- Craig Polley, Steven M. Cramer and Rodolfo V. de la Cruz “Potential For Using Waste Glass In Portland Cement Concrete” Cement and Concrete Research, 2008 Vol. 36, p.p.489–532.
- Narayanan Neithalath “An Overview Of The Benefits Of Using Glass Powder As Partial Cement Replacement Material In Concrete” Indian Concrete Journal, 2011.
- R. Idir, M. Cyr, A. Tagnit-Hamou “Use Of Waste Glass As Powder And Aggregate In Cement-Based Materials” 1stInternational Conference on Sustainable Built Environment Infrastructures in Developing Countries ENSET Oran (Algeria),2009, p.p. 109-114.
- Victor Shevchenko and WojciechSwierad “A Mechanism Of Portland Cement Hardening In The Presence Of Finely Grained Glass Powder” Journal of Chemistry and Chemical Technology, 2007, Vol. 1, No3, p.p.179-184
- IS 10262:2009 Indian Standard Concrete Mix Proportioning- Guidelines (First Revision).
- Gautam Singh, Ashish Kumar singh, Akhil Bhaskar, Ajit Singh Attree. “A Critical Study of Effectiveness Of Waste Glass Powder In Concrete”. Vol 5 [3], (2014). http://www.theconcreteportal.com/scc.html