University of Information Technology and Sciences

www.uits.edu.bd
Jamalpur, Bangladesh

The University of Information Technology & science is a university in Baridhara, Dhaka, Bangladesh. Its vice chancellor is Professor Dr. Muhammad Samad. Wikipedia.

SEARCH FILTERS
Time filter
Source Type

Al-Imtiaz,University of Information Technology and Sciences | Kibria M.G.,University of Information Technology and Sciences
2012 International Conference on Informatics, Electronics and Vision, ICIEV 2012 | Year: 2012

To meet the challenges in the modern business world, every organization must have a complete structure to maintain its management and system. Nowadays organizational structure totally depends on an automated system. Enterprise Resource Planning (ERP) integrates internal and external information across the entire organization embraces finance/accounts, manufactures, sales and service; and automates these activities with an integrated computer-based application. ERP is a complex software system used to manage information required to run large organization. The main goal of an ERP is data flow among the departments of an organization. Two modules named, Schedule Manager and Notice Manager have been integrated with ERP. Throughout the experiment on ERP based software named - Software Application Production (SAP), some key ways have been explored through which the software performs better with more user friendly. © 2012 IEEE.


Begum Z.,University of Information Technology and Sciences
IFMBE Proceedings | Year: 2013

With a view to evaluate the Quality Assurance status of radiodiagnostic facilities some basic elements of QA program such as frequency of different procedures, reject/repeat analysis, record keeping and justification of each procedure were evaluated in around 100 Hospitals/Clinics in four districts including Dhaka, the Capital City of Bangladesh. Also to check the optimal performance of the machines some of the essential Quality Control (QC) tests those can be performed with minimum cost and efforts on a regular basis were studied in this paper. The following important QC parameters were checked: kVp Accuracy Test, Output Reproducibility, Linearity/mA, mR/mAs, Reproducibility/kVp and Reproducibility/time, Accuracy/time, Focus Film Distance (FFD), Half-Value Layer (HVL). It was observed that effective QA program has yet not been introduced in most of the diagnostic departments of Bangladesh. Fundamental radiation protection principles of medical exposure Justification and Optimization are not taken into consideration. Frequency analysis or reject/repeat analysis is not being done, record keeping is not being practiced and also no sort of routine/occasional QC tests are being introduced in the hospitals/clinics. So, it is most likely that the patients and general public are being exposed with unwanted radiation exposure. Hence, steps should be taken to make awareness among the Radiological departments about the necessity of adapting QA/QC programs in the facilities. © 2013 Springer-Verlag.


Hasan M.M.,University of Information Technology and Sciences
Wireless Personal Communications | Year: 2013

Orthogonal frequency division multiplexing (OFDM) is perhaps the most spectrally efficient, robust transmission technique discovered so far for communication systems, and it also mitigates the problem of multipath environment. High peak-to-average power ratio (PAPR) has always been a major drawback of the OFDM systems. In this article, a new precoding technique has been proposed based on Vandermonde-like matrix (VLM) and selective mapping (SLM) to reduce PAPR in OFDM systems. VLM precoding reduces the autocorrelation of the input sequences while SLM takes an advantage of the fact that the PAPR is very sensitive to phase shifts of the signal. The main advantage of this proposed scheme is to achieve a significant reduction in PAPR without increasing the system complexity. Computer simulations show that, the proposed method outperforms the existing precoding techniques without degrading the error performance of the system. © 2013 Springer Science+Business Media New York.


Hasan M.M.,University of Information Technology and Sciences
Wireless Personal Communications | Year: 2014

High peak-to-average power ratio (PAPR) has always been as a major problem in orthogonal frequency division multiplexing (OFDM) that leads to a severe nonlinear distortion in practical hardware implementations of high power amplifier. In this article, a new PAPR reduction method is proposed based on linear predictive coding (LPC). This method proposes the use of signal whitening property of LPC as a preprocessing step in OFDM systems. Error filtering of the proposed method removes the predictable content of stationary stochastic processes which can reduce the autocorrelation of input data sequences and is shown to be very effective solution for PAPR problem in OFDM transmissions. It is shown that the proposed method can achieve a significant reduction in PAPR without degrading the power spectral level, error performance or computational complexity of the systems. It is also shown that the proposed method is independent of modulation schemes and can be applied to any number of subcarriers under both additive white gaussian noise and wireless Rayleigh fading channel. © 2013 Springer Science+Business Media New York.


Hasan M.M.,University of Information Technology and Sciences
Wireless Networks | Year: 2014

High peak-to-average power ratio (PAPR) is still one of the major problems in orthogonal frequency division multiplexing (OFDM). In this article, a new precoding method is proposed and analyzed based on complex Vandermonde matrix (CVM). The reduction in PAPR of the OFDM signal is obtained using the decorrelation property of CVM which removes any redundancy from the input sequence and can be a very effective for PAPR reduction. Also, the phase-rotation property of CVM takes an advantage of the fact that the PAPR is very sensitive to phase-shifts of the signal. It is shown that the proposed precoding outperforms most of the powerful precoding techniques and can achieve a PAPR gain up to 6.5 and 7.4 dB for IEEE 802.11a and DVB-T OFDM systems respectively. Moreover, CVM precoding does not change power spectral levels or error performances when compared with the normal OFDM systems, also it does not increase the computational complexity when compared with the existing precoding methods. It is shown that the performance of the proposed precoding is independent of modulation schemes and the number of subcarriers. The proposed CVM precoding also takes advantage of the frequency variations of the communication channel and can provide considerable performance gain in fading-multipath channels. © 2014 Springer Science+Business Media New York.


Ghose S.,University of Information Technology and Sciences | Barua J.J.,University of Information Technology and Sciences
Proceedings of 2013 2nd International Conference on Advances in Electrical Engineering, ICAEE 2013 | Year: 2013

The increasing inclusion of plethora of sensors in sophisticated and latest generation smart phones opens new avenues for Data Mining applications for activity recognition, a task which involves identifying the physical activity a user is performing. In this paper, we describe and evaluate phone-based accelerometers to perform activity recognition. In order to implement our system, we collected labeled accelerometer data from twenty-three users as they performed daily activities such as strolling, running, climbing stairs, Relaxing (sitting inhaling), and Relaxing(standing exhaling), and then aggregated this time series data into examples that summarize the user activity over 10-second intervals. We transformed raw data into examples by tracing of action duration and segmented acceleration data by equal binning to make it a training data for input. We then used the resulting training data to induce a predictive model for activity recognition. We use WEKA data mining tools for data preprocessing and classification. Experimentation carried out based on our data classification stages eventually traces activities with finer accuracy. © 2013 IEEE.


Hasan M.M.,University of Information Technology and Sciences
Wireless Personal Communications | Year: 2015

Orthogonal frequency division multiplexing (OFDM) system suffers from a high peak-to-average (power) ratio (PAR) which leads to power inefficiency in radio frequency section and large performance degradation of system due to the nonlinearity of high power amplifiers (HPA). In this paper, a new downlink transmission scheme is designed based on orthogonal periodic function (OPF) precoding to achieve low PAR and investigated for single user and multi-user multiple-input multiple-output wireless systems. It is shown (through mathematical analysis and computer simulations) that the proposed transmission scheme can provide a significant PAR reduction using decorrelation, phase-rotation and orthogonality properties of OPF precoding, while it does not change power spectral levels or error performances due to the unitary property when compared with the normal OFDM systems with linear HPA. The OPF precoding outperforms existing precoding schemes when nonlinear solid state power amplifier (SSPA) is considered with several practical values of input back-off (IBO). Computer simulations show that the OPF precoding can achieve 3.1 and 4 dB PAR gain, while 2.2 and 1 dB SNR gain for IEEE 802.11a and DVB-T systems respectively. Moreover, OPF precoding leads to a total degradation improvement from 0.13 to 1.53 dB for 16 QAM, considering an SSPA with IBO = 8–4 dB respectively. OPF precoding does not increase computational complexity when compared with the existing precoding methods. It is shown that the performance of the proposed precoding is independent of modulation schemes and can work for any number of subcarriers. © 2015, Springer Science+Business Media New York.


Hasan M.M.,University of Information Technology and Sciences
Circuits, Systems, and Signal Processing | Year: 2014

Orthogonal frequency division multiplexing (OFDM) is perhaps the most spectrally efficient method discovered so far for communication systems and yet have an excellent immunity against multipath fading and inter-symbol interference. One of the major drawbacks of OFDM systems is their high peak-to-average power ratio (PAPR), which degrades system performance when nonlinear high power amplifiers (HPA) are employed. In this article, a new companding technique based on gamma correction (GC) function is proposed and analyzed. Through extensive computer simulations, it is shown that the proposed technique outperforms the previously suggested A-law and μ-law companding methods for PAPR reduction. A thorough investigation of GCC companding is presented in terms of computational complexity (CC), complementary cumulative distribution function (CCDF), power spectral density (PSD), and bit-error-rate (BER). It is also shown that the proposed method is independent of modulation schemes and can be applied to any number of subcarriers. © 2013 Springer Science+Business Media New York.


Hasan M.M.,University of Information Technology and Sciences
Circuits, Systems, and Signal Processing | Year: 2014

Orthogonal frequency division multiplexing (OFDM) has a very high peak-to-average power ratio (PAPR) that causes a severe nonlinear distortion in practical hardware implementation of high power amplifiers (HPA). In this article, a new PAPR reduction method is proposed based on autoregressive (AR) error filtering. This method proposes the use of signal whitening property of error filtering as a preprocessing step to remove the predictable content of stationary stochastic processes which can reduce the autocorrelation of input data sequences and is shown to be a very effective solution for the PAPR problem in OFDM systems. It is shown that the proposed method can achieve a significant reduction in PAPR without degrading the error performance or power spectral levels. It is also shown that the proposed method is applicable to any modulation scheme and can work for any number of subcarriers under both additive white Gaussian noise and wireless Rayleigh fading channel. © 2013 Springer Science+Business Media New York.


Muhury L.,University of Information Technology and Sciences | Habib A.H.M.A.,Chittagong University of Engineering and Technology
Proceeding of the 15th International Conference on Computer and Information Technology, ICCIT 2012 | Year: 2012

In the age of electronic systems it is important to acquire and control information from everywhere. Here we present a novel secure real time method to control device. We summarizes a study conducted to examine the feasibility of implementing Global System for Mobile Communications (GSM), using Duel Tone Multi-Frequency (DTMF) as an alternative means of communication to Radio Frequency (RF) to control electrical appliances. In remote communication, DTMF signal can replace RF signal for the advantage of simplicity and audibility. A user can send DTMF tone to control home appliances or machines in industries. Any GSM mobile phone can be employed to send DTMF tone. The advantage of this system is the use of GSM technology for communication and at a time control of many devices. This paper deals with the design and experimentation, which can be useful for the people who are working in research laboratory, industry & education in the field of Communication, Control, wireless technology etc. © 2012 IEEE.

Loading University of Information Technology and Sciences collaborators
Loading University of Information Technology and Sciences collaborators