Human Activity Analysis: Concentrating on Motion History Image and Its Variants

Md. Atiqur Rahman Ahad,J.K. Tan,H. Kim,S. Ishikawa 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8

The Motion History Image (MHI) method is a view-based temporal template approach, which is simple and robust in representing movements, and hence MHI is widely employed by various research groups for action recognition, motion analysis, etc. This paper overviews motion history image (MHI)-based human motion recognition techniques. Since the inception of the motion history image template for motion recognition, various progresses have been adopted to improve this basic MHI technique. We have presented almost all the important variants of the MHI method in this paper. This paper has pointed some areas for further research at the top of this method.

Human Activity Recognition

Md. Atiqur Rahman Ahad,J.K. Tan,H.S. Kim,S. Ishikawa 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10

Action and activity representation and recognition are very demanding research area in computer vision and man-machine interaction. Though plenty of researches have been done in this arena, the field is still immature. Over the last decades, extensive research methodologies have been developed on human activity analysis and recognition for various applications. This paper overviews various recent methods for human activity recognition with analysis. We attempt to sum up the various methods related to human motion representation and recognition. We make an effort to categorize the recent methods from the best in the business, and finally figure out the short-comings and challenges to dig out in future to develop robust action recognition approaches. This work exclusively endeavors to encompass the researches related only to human action recognition mainly from 2001 till-to-date with critical assessment of the methods. We also present our work along with to solve some of the shortcomings. It will widely benefit the researchers to understand and compare the related advancements in this area.

Analgesic and anti-inflammatory activities of $Alocasia$ $indica$ ($Roxb.$) $Schott$

Rahman, Md. Atiqur,Solaiman, Md.,Haque, Md. Ekramul,Das, A.K. 경희한의학연구센터 2011 Oriental Pharmacy and Experimental Medicine Vol.11 No.3

The ethanol extract of the dried rhizome of Alocasia indica (Roxb.) Schott. (Family - Araceae) was investigated for its possible analgesic and anti-inflammatory activities in animal models. The extract showed significant ($P$ <0.001) writhing inhibition in acetic acid-induced writhing in mice at the oral dose of 300 and 600 mg/kg of body weight comparable to the standard drug diclofenac sodium at the dose of 25 mg/kg of body weight. Moreover, when given orally to rats at dose of 300 and 600 mg/kg of body weight, the extract showed a significant ($P$ <0.001) anti-inflammatory activity against carrageenin induced paw edema in rats which was comparable to the standard drug aspirin at the dose of 150 mg/kg of body weight. The overall results tend to suggest the analgesic and anti-inflammatory activities of the crude ethanolic extract of dried rhizome of $Alocasia$ $indica$ ($Roxb.$) $Schott$. The obtained results provide a support for the use of this plant in traditional medicine and its further investigation.

Thermo-hydraulic Effect of Tubular Heat Exchanger Fitted with Perforated Baffle Plate with Rectangular Shutter-type Deflector

Md Atiqur Rahman 한국화학공학회 2024 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.62 No.2

A study was conducted on a tubular heat exchanger to improve its heat transfer rate by using a novel baffle plate design with discontinuous swirling patterns. The design consisted of perforated baffle plates with rectangular air deflectors positioned at varying angles. The tubes in the heat exchanger were arranged in a consistent alignment with the airflow direction and exposed to a uniform heat flux on their surfaces. Each baffle plate included sixteen deflectors inclined at the same angle and arranged in a clockwise pattern. This arrangement induced a swirling motion of the air inside a circular duct where the heated tubes were located, leading to increased turbulence and improved heat transfer on the tube surfaces. The spacing between the baffle plates was adjusted at different pitch ratios, and the Reynolds number was controlled within a range of 16,000 to 29,000. The effects of pitch ratios and inclination angles on the heat exchanger's performance were analyzed. The results indicated that using a baffle plate with rectangular deflectors inclined at 30° and a pitch ratio of 1.2 resulted in an average increase of 1.29 in the thermal enhancement factor.

DWT-SVD based New Watermarking Idea in RGB Color Space

Md. Atiqur Rahman,M.M. Fazle Rabbi 보안공학연구지원센터 2015 International Journal of Signal Processing, Image Vol.8 No.6

The growing demand of securing the online trade and digital content bought the digital watermarking as major tools for protecting copyright, preventing unauthorized distribution, track back the source, confirming the ownership, authentication and many more. This paper proposes a new algorithm which shows better resistance against some common attacks. The SVD-DWT technique is applied here for deconstructing and reconstructing the image. The secret watermark is embedded into the R band using a secret key after separating the host image into three respective bands namely R, G and B. The extracting process is performed by splitting the watermarked image into all the color channels and then applying further process into R plane. The experimental result shown in tabular form indicates the better robustness of the proposed algorithm against various attacks on image.

DWT-SVD based New Watermarking Idea in RGB Color Space

Md. Atiqur Rahman,M.M. Fazle Rabbi 보안공학연구지원센터 2015 International Journal of Signal Processing, Image Vol.8 No.7

The growing demand of securing the online trade and digital content bought the digital watermarking as major tools for protecting copyright, preventing unauthorized distribution, track back the source, confirming the ownership, authentication and many more. This paper proposes a new algorithm which shows better resistance against some common attacks. The SVD-DWT technique is applied here for deconstructing and reconstructing the image. The secret watermark is embedded into the R band using a secret key after separating the host image into three respective bands namely R, G and B. The extracting process is performed by splitting the watermarked image into all the color channels and then applying further process into R plane. The experimental result shown in tabular form indicates the better robustness of the proposed algorithm against various attacks on image.

MPK9 and MPK12 function in SA-induced stomatal closure in <i>Arabidopsis thaliana</i>

Khokon, Md. Atiqur Rahman,Salam, Mohammad Abdus,Jammes, Fabien,Ye, Wenxiu,Hossain, Mohammad Anowar,Okuma, Eiji,Nakamura, Yoshimasa,Mori, Izumi C.,Kwak, June M.,Murata, Yoshiyuki Informa UK (TaylorFrancis) 2017 Bioscience, Biotechnology, and Biochemistry Vol.81 No.7

<P>Salicylic acid (SA) induces stomatal closure sharing several components with abscisic acid (ABA) and methyl jasmonate (MeJA) signaling. We have previously shown that two guard cell-preferential mitogen-activated protein kinases (MAPKs), MPK9 and MPK12, positively regulate ABA signaling and MeJA signaling in Arabidopsis thaliana. In this study, we examined whether these two MAPKs are involved in SA-induced stomatal closure using genetic mutants and a pharmacological, MAPKK inhibitor. Salicylic acid induced stomatal closure in mpk9 and mpk12 single mutants but not in mpk9 mpk12 double mutants. The MAPKK inhibitor PD98059 inhibited SA-induced stomatal closure in wild-type plants. Salicylic acid induced extracellular reactive oxygen species (ROS) production, intracellular ROS accumulation, and cytosolic alkalization in the mpk9, mpk12, and mpk9 mpk12 mutants. Moreover, SA-activated S-type anion channels in guard cells of wild-type plants but not in guard cells of mpk9 mpk12 double mutants. These results imply that MPK9 and MPK12 are positive regulators of SA signaling in Arabidopsis guard cells.</P>

Comparative Study and Performance Analysis of Different Modulation Techniques Relevant to Bangabandhu Satellite Communication System

Md. Sazal Miah,Md. Atiqur Rahman,Zabid Ahmed,Yeonggwang Kim,Jinsul Kim 한국디지털콘텐츠학회 2020 The Journal of Contents Computing Vol.2 No.1

Satellite communication assumes a crucial job in the innovative advancement of a nation. Being the nation"s first communications satellite, Bangabandhu Satellite-1 (BS-1) is considered as an achievement for Bangladesh in the advanced Era. With the effective dispatch and situated in an orbit, this is a proper journey towards the space age for this developing nation that became freedom just 47 years ago. The main objective of this research is to study and compare to analyze the performance of different modulation techniques relevant to the Bangabandhu Satellite-1 communications system. The working principle and modulation techniques of Bangabandhu Satellite-1 as well as the advantages of this satellite in Bangladesh are illustrated here. The analysis and design of the elements of modern satellite communications systems are considered here. Firstly, we have introduced the concept of satellite communication along with its background and motivation. A discussion of the history of BS-1 and its coverage area, technical aspects, frequency bandwidth, services, advantages, and key features are included. Next, we have described different types of analog and digital modulation, highlighting the ones that are being used in BS-1. The performance of different modulation techniques is implemented and compared using MATLAB based simulation. Finally, we can come to the conclusion that modulation techniques used in BS-1 are well serving the purposes considering its performance and beneficial criteria as compared with others.