Ikbal Hossain - Academia.edu (original) (raw)

Papers by Ikbal Hossain

Introduction: Comprehensive management of TMJ ankylosis including restoration of form, function a... more Introduction: Comprehensive management of TMJ ankylosis including restoration of form, function and aesthetics is a challenging aspect for Oral & Maxillofacial Surgeon. Various treatment modalities have been reported in the literature with their merits, demerits and diverse success rate. Materials and Method: We report our experience in reconstruction of Ramal Condylar Unit (RCU) in temporomandibular joint ankylosis patients in a retrospective review. A total of 06 cases of TMJ ankylosis were included in the review. The cases were managed in our tertiary care centre from June 2019 to June 2020. Demographic distribution of the patients, preoperative findings, surgical modalities used for RCU reconstruction and postoperative outcome were recorded and compared. Results: Average mouth opening increased from 8.5 mm pre-operatively to 29.5 mm 3 months postoperatively. 02 cases of Sawhney’s type I and II ankylosis were managed by interpositional gap arthroplasty using temporalis myofascial...

Review of International Geographical Education Online, Jul 14, 2021

International Journal of Scientific & Technology Research, 2020

Total Quality Management (TQM) practices and utilization of modern technology in the Ready Made G... more Total Quality Management (TQM) practices and utilization of modern technology in the Ready Made Garments (RMG) sector of Bangladesh are considered to be very important, as RMG is becoming a thrust sector to the economy of the country. Without modern and sophisticated technology today’s RMG sector is in vain. An expanding number of garment industries in creating nations are honing TQM with a specific end goal to produce enhancements in execution and stay aggressive. A sample of 50 garment industries from Dhaka, Narayanganj, Gajipur and Savar EPZ of Bangladesh was selected to conduct the study. A field overview with an organized poll and meetings was led to accumulating vital data from the organizations. These organizations were chosen purposefully to guarantee the best conceivable situation of TQM practices in Bangladesh. The central purpose of this paper is to inspect the performance of TQM in the RMG sector of Bangladesh. The exploration discoveries demonstrate that organizations, ...

Bangladesh is one of the most vulnerable countries in the world to climate change. The major envi... more Bangladesh is one of the most vulnerable countries in the world to climate change. The major environmental vulnerabilities viz. droughts, floods, flash floods, cyclone, salinity, tidal surges, water-logging, extreme temperature, low light intensity, fogginess, incidences of pests and diseases etc are affecting the agricultural production systems. Adaptation is important to limit the negative impacts of climate change. Majority of the people in vulnerable areas are involved in crop cultivation, homestead gardening and fishing but they remain frequently unemployed due to climate risks and other natural disasters resulting food insecurity. Present study was undertaken during 2012-13 under ARCAB to analyze the climate impacts on crop production systems and to suggest appropriate coping strategies and adaptation options for increased agricultural productions and better livelihood of the vulnerable people of Naogaon Sadar. Survey, FGDs, HHs and Stakeholders' Consultations were conduct...

The objective of this examination is to investigate and foresee the Lung Diseases with assistance... more The objective of this examination is to investigate and foresee the Lung Diseases with assistance from Machine Learning Algorithms. The most common lung diseases are Asthma, Allergies, Chronic obstructive pulmonary disease (COPD), bronchitis, emphysema, lung cancer and so on. It is important to foresee the odds of lung sicknesses before it happens and by doing that individuals can be causes and make fundamental strides before it occurs. In this paper, we have worked with a collection of data and classified it with various machine learning algorithms. We have collected 323 instances along with 19 attributes. These data have been collected from patients suffering from numerous lung diseases along with other symptoms. The Lung diseases attribute contains two types of category which are ‘Positive’ and ‘Negative’. ‘Positive’ means that the person has a lung disease and so forth. The training of the dataset has been done with K-Fold Cross Validation Technique and specifically, five Machin...

This paper represents a story-based Role-Playing Game. This article outlines a virtual role-playi... more This paper represents a story-based Role-Playing Game. This article outlines a virtual role-playing game where a user or gamer can do anything (which actions are loaded previously) in the virtual gaming environment There is growing attentiveness in the case of video games. The recent improvement of online, social joined video games (broadly multiplayer online role-playing games) now has created an experience for new gamers. A system in the Role-Playing Game (RPG) has some real-world scenarios that can be interconnected to the people of the real world, and some real action of life. An interactive environment in the gaming world has some characteristics that can participate in some action of the game based on the option available and in the choice of the user or gamer Developing a new 3D virtual environment by using a game engine strategy is to incorporate various multimedia data in one platform. Doing so we create the domain for a virtual reality console experience. We created this R...

IEEE Antennas and Wireless Propagation Letters, 2020

A broadband measurement technique for the normal-incidence absorptivity based on parallel-plate w... more A broadband measurement technique for the normal-incidence absorptivity based on parallel-plate waveguide (PPW) is proposed. The method is well suited for frequency-selective surface (FSS)-based absorbers. By employing the PPW structure, only a small sample size, i.e., 1-D array of FSS, is required for the measurement. The thru-reflect-line (TRL) calibration is implemented to remove the time-gating ambiguity in the conventional PPW-based method. A measurement system working up to 6 GHz is designed such that its length is adjustable to ensure all three calibration standards (thru, reflect, and line) can be carried out in a single device. Moreover, the height of the PPW is also adjustable to allow the measurement of absorbers with a different periodicity of FSSs. Two single-layer FSS-based absorbers with different periodicity are fabricated and measured. The results agree well with the conventional free-space measurement system, which validates the proposed method.

International Journal of Management and Accounting, 2020

With the advancement of the tourism industry, the importance of research on visitor satisfaction ... more With the advancement of the tourism industry, the importance of research on visitor satisfaction has been increasing as of recent years. The prime objective of the current study is to explore the factors influencing visitor satisfaction from the perspective of archaeological sites, in Bangladesh. A thorough and well-constructed research design is administered to analyze 200 data collected from the visitors having experience in visiting Paharpur Buddha Vihara. From the data, we conducted an extensive analysis to find out the main factors which influence visitor satisfaction. It is recognized that there are some essential factors; destination attractions, safety and security, favorable environment, food attraction, and cost at said destination. These factors significantly influence visitor satisfaction. It is expected that the outcome of the study will support the tourism practitioners in planning and development for successful business operations. The paper concludes with some implic...

Materiali in tehnologije, Feb 14, 2017

In this paper a metamaterial-embedded, compact microstrip-fed patch antenna is introduced for mic... more In this paper a metamaterial-embedded, compact microstrip-fed patch antenna is introduced for microwave C-band applications. The proposed antenna is composed of a rectangular metamaterial-embedded patch, microstrip-fed line and a partial ground plane. The finite-integration technique (FIT) based on Computer Simulation Technology (CST) Microwave Studio is utilized in this study. The measurements of antenna performances are conducted in a near-field measurement laboratory. The antenna performance parameters comprising the reflection coefficient, radiation efficiency, gain, and radiation pattern are studied to validate the antenna performance. The measured results show that the proposed metamaterial-embedded antenna exhibits a wide impedance bandwidth over the C band (from 3.77 GHz to 6.58 GHz). The results also indicate good radiation efficiency and antenna gain with a nearly omni-directional radiation pattern at the frequencies of interest.

Journal of Business and Economics, 2015

Work-family conflict (WFC) is a universal issue irrespective of the countries and cultures all ov... more Work-family conflict (WFC) is a universal issue irrespective of the countries and cultures all over the world. But the nature and extent are likely to be different in different societies with different cultural characteristics. This paper is an attempt to identify the factors that result in WFC of female employees working at different universities, commercial banks and government organizations in Bangladesh. WFC is a common issue and produces negative effects for the employees, their families, and work organizations. It is more severe for the female employees compare to male employees in the traditional society like Bangladesh. Female participation in the work place is gradually increasing over the last few decades. Working women are encountering role conflict because of family responsibilities. This study is based on primary data. A sample of 50 female employees from ten organizations is selected and they are asked to unearth the key factors that lead to work-family conflict. The data are gathered by administering questionnaires. The study shows that the main variables responsible for WFC are: long working hour, job inflexibility, work overload, child care responsibility, age of children, dependent care responsibility, discrimination at work place, inadequate supervisory support, autocratic management style, inadequate family support, and the absence of husband's support. The findings of the study emphasized the need to formulate guidelines for the management of WFC at the organizational level as it is connected to job satisfaction and performance of the employees.

Materials Science, 2016

Cellular phones are used in the vicinity of a human head, which absorbs power from antenna radiat... more Cellular phones are used in the vicinity of a human head, which absorbs power from antenna radiation. This investigation analyzes the effects of antenna substrate materials on electromagnetic (EM) absorption in a human head. Antennas are used in analysis with four different dielectric substrate materials, which are Bakelite, FR4 glass epoxy, Rogers R04003, and Taconic TLC. Moreover, two different thicknesses of each substrate are considered in the experimental setup. The EM absorption associated with two types of cell phone antennas is evaluated in the closed vicinity of the human head model. One of them is planar inverted-F antenna (PIFA), which is used as the internal handset antenna and another one is helical antenna, which is used as external handset antenna. This investigation consists of two different operating frequency bands, GSM 900 MHz and DCS 1800 MHz. The EM absorption in the human head is presented using the peak specific absorption rate (SAR) and total absorbed power (TAP) by the user. The finite-difference time-domain (FDTD) method based on Computer Simulation Technology (CST) Microwave studio is utilized in this investigation. The obtained results show that the substrate materials do not effect SAR and TAP values considerably for both antennas, but substrate thickness affects the SAR and TAP values significantly. In addition, the substrate thickness affects the SAR and TAP values significantly in most of the cases Moreover, PIFA produces lower SAR than that of a helical antenna significantly for both GSM and DCS frequency band.

International Journal of Applied Electromagnetics and Mechanics, 2015

A new design and analysis of cellular phone casing based on shielding technique is presented in t... more A new design and analysis of cellular phone casing based on shielding technique is presented in this study to reduce the EM absorption in the human head. A dual band PIFA is designed to operate at 900 MHz and 1900 MHz GSM frequency bands as an internal handset antenna. The specific absorption rate (SAR) in the human head and total absorbed power by the cell phone user are calculated along with antenna performances. It is found that the SAR in the head is reduced due to the proposed casing considerably for both the lower and upper frequency bands. The new mobile casing provides 48.2% reduction in the SAR at 900 MHz and 44.8% reduction at 1900 MHz. In addition, the mobile casing improves the radiation efficiency for 6% and 7% in comparison with without casing configuration at the lower and upper GSM frequency bands respectively.

Biomedical Engineering / Biomedizinische Technik, 2017

This paper represents a comparative study on electromagnetic (EM) absorption in the human head be... more This paper represents a comparative study on electromagnetic (EM) absorption in the human head between a printed monopole antenna and a planar inverted-F antenna (PIFA). The specific absorption rate (SAR) values and total absorbed power in the human head phantom are used to evaluate EM absorption for both antennae. Moreover, antenna performances in terms of return loss, radiation efficiency, and gain are also investigated in this study. The finite integration technique (FIT) based on CST Microwave studio and SAM head phantom are used in this study. The antenna performances are measured in an anechoic chamber and the SAR is tested using COMOSAR measurement system. The obtained results indicate that the printed monopole antenna lead to higher EM absorption in the human head as compared to PIFA for both GSM frequencies.

Journal of US-China Public Administration, 2015

This paper aims at examining the importance of cordial and high-level cooperation between managem... more This paper aims at examining the importance of cordial and high-level cooperation between management and employees, as identical partners in industrial advancement and progress. There is a legislative obligation to form a participative committee at the industrial enterprises in Bangladesh to achieve labor-management cooperation, but the majority of the executives mainly in the private sector, have ill-treated this prerequisite of regulation. Based on an interview with a good number of respondents (managers, union leaders, experts, and political leaders), the study has attempted to identify the obstacles that stand in the way of cohesive cooperation between these two parties. The important factors deterring collaboration according to the respondents are: mutual mistrust between management and labor, class distinction between managers and employees, labor disputes, politicization of labor unions resulting in intra-and inter-union rivalries, worker's backwardness, problem of determination of a collective bargaining agent, and infringement of labor laws, among others. Because of these factors, this committee has not yielded effective results. The prevailing climate is not encouraging cooperation, rather inhibiting the same. Finally, some suggestions such as top management support and commitment, confidence in people, employment security, trust, adequate information, reward, friendly working environment, acceptance of change, interaction between managers and employees, and timely feedback have been recommended which may help create congenial labor-management cooperation at the plant level as a means of establishing industrial peace and achieving higher productivity.

Applied Computational Electromagnetics Society Journal

In this paper, a new design of cell phone body is presented to reduce the specific absorption rat... more In this paper, a new design of cell phone body is presented to reduce the specific absorption rate (SAR) in the human head. The SAR in the human head and total absorbed power by the cell phone user are calculated along with antenna performances in terms of radiation efficiency and directivity to validate the effects of cell phone body. It is found that the SAR in the head is reduced significantly for both the lower and upper global systems for mobile (GSM) frequency band. The new mobile body provides 63.8% reduction in the SAR at 900 MHz and 69.2% reduction at 1800 MHz in comparison of without mobile cover configuration. Moreover, the mobile casing improves the radiation efficiency 6% and 7% in the lower and the upper GSM frequency band respectively.

2015 2nd International Conference on Biomedical Engineering (ICoBE), 2015

ABSTRACT The aim of this paper is to investigate the effects of the distance between the human he... more ABSTRACT The aim of this paper is to investigate the effects of the distance between the human head and internal cellular device antenna on the specific absorption rate (SAR). The effects of the metal-glass casing of mobile phone on the SAR values were observed in the vicinity of the human head model. Additionally, the reflection coefficients were investigated in all cases to evaluate antenna performance. This analysis was performed by adopting finite-difference time-domain (FDTD) method on Computer Simulation Technology (CST) Microwave Studio. The results indicate that by increasing the distance between the user's head and antenna, SAR values are decreased.

International Journal of Applied Electromagnetics and Mechanics, 2015

In this paper, a metamaterial embedded planar inverted-F antenna (PIFA) is proposed for cellular ... more In this paper, a metamaterial embedded planar inverted-F antenna (PIFA) is proposed for cellular phone. A dual band PIFA is designed to operate both GSM 900 MHz and DCS 1800 MHz. The ground plane of conventional PIFA is modified using a double negative (DNG) metamaterial array. The investigation is performed using the Finite Integration Technique (FIT) of CST Microwave Studio. The specific absorption rate (SAR) values are calculated considering two different holding positions-cheek and tilt. The results indicate that the proposed metamaterial embedded antenna produces lower SAR in the human head compared to conventional PIFA. Moreover, the modified antenna substrate leads to slight improvement of the antenna performances.

Introduction: Comprehensive management of TMJ ankylosis including restoration of form, function a... more Introduction: Comprehensive management of TMJ ankylosis including restoration of form, function and aesthetics is a challenging aspect for Oral & Maxillofacial Surgeon. Various treatment modalities have been reported in the literature with their merits, demerits and diverse success rate. Materials and Method: We report our experience in reconstruction of Ramal Condylar Unit (RCU) in temporomandibular joint ankylosis patients in a retrospective review. A total of 06 cases of TMJ ankylosis were included in the review. The cases were managed in our tertiary care centre from June 2019 to June 2020. Demographic distribution of the patients, preoperative findings, surgical modalities used for RCU reconstruction and postoperative outcome were recorded and compared. Results: Average mouth opening increased from 8.5 mm pre-operatively to 29.5 mm 3 months postoperatively. 02 cases of Sawhney’s type I and II ankylosis were managed by interpositional gap arthroplasty using temporalis myofascial...

Review of International Geographical Education Online, Jul 14, 2021

International Journal of Scientific & Technology Research, 2020

Total Quality Management (TQM) practices and utilization of modern technology in the Ready Made G... more Total Quality Management (TQM) practices and utilization of modern technology in the Ready Made Garments (RMG) sector of Bangladesh are considered to be very important, as RMG is becoming a thrust sector to the economy of the country. Without modern and sophisticated technology today’s RMG sector is in vain. An expanding number of garment industries in creating nations are honing TQM with a specific end goal to produce enhancements in execution and stay aggressive. A sample of 50 garment industries from Dhaka, Narayanganj, Gajipur and Savar EPZ of Bangladesh was selected to conduct the study. A field overview with an organized poll and meetings was led to accumulating vital data from the organizations. These organizations were chosen purposefully to guarantee the best conceivable situation of TQM practices in Bangladesh. The central purpose of this paper is to inspect the performance of TQM in the RMG sector of Bangladesh. The exploration discoveries demonstrate that organizations, ...

Bangladesh is one of the most vulnerable countries in the world to climate change. The major envi... more Bangladesh is one of the most vulnerable countries in the world to climate change. The major environmental vulnerabilities viz. droughts, floods, flash floods, cyclone, salinity, tidal surges, water-logging, extreme temperature, low light intensity, fogginess, incidences of pests and diseases etc are affecting the agricultural production systems. Adaptation is important to limit the negative impacts of climate change. Majority of the people in vulnerable areas are involved in crop cultivation, homestead gardening and fishing but they remain frequently unemployed due to climate risks and other natural disasters resulting food insecurity. Present study was undertaken during 2012-13 under ARCAB to analyze the climate impacts on crop production systems and to suggest appropriate coping strategies and adaptation options for increased agricultural productions and better livelihood of the vulnerable people of Naogaon Sadar. Survey, FGDs, HHs and Stakeholders' Consultations were conduct...

The objective of this examination is to investigate and foresee the Lung Diseases with assistance... more The objective of this examination is to investigate and foresee the Lung Diseases with assistance from Machine Learning Algorithms. The most common lung diseases are Asthma, Allergies, Chronic obstructive pulmonary disease (COPD), bronchitis, emphysema, lung cancer and so on. It is important to foresee the odds of lung sicknesses before it happens and by doing that individuals can be causes and make fundamental strides before it occurs. In this paper, we have worked with a collection of data and classified it with various machine learning algorithms. We have collected 323 instances along with 19 attributes. These data have been collected from patients suffering from numerous lung diseases along with other symptoms. The Lung diseases attribute contains two types of category which are ‘Positive’ and ‘Negative’. ‘Positive’ means that the person has a lung disease and so forth. The training of the dataset has been done with K-Fold Cross Validation Technique and specifically, five Machin...

This paper represents a story-based Role-Playing Game. This article outlines a virtual role-playi... more This paper represents a story-based Role-Playing Game. This article outlines a virtual role-playing game where a user or gamer can do anything (which actions are loaded previously) in the virtual gaming environment There is growing attentiveness in the case of video games. The recent improvement of online, social joined video games (broadly multiplayer online role-playing games) now has created an experience for new gamers. A system in the Role-Playing Game (RPG) has some real-world scenarios that can be interconnected to the people of the real world, and some real action of life. An interactive environment in the gaming world has some characteristics that can participate in some action of the game based on the option available and in the choice of the user or gamer Developing a new 3D virtual environment by using a game engine strategy is to incorporate various multimedia data in one platform. Doing so we create the domain for a virtual reality console experience. We created this R...

IEEE Antennas and Wireless Propagation Letters, 2020

A broadband measurement technique for the normal-incidence absorptivity based on parallel-plate w... more A broadband measurement technique for the normal-incidence absorptivity based on parallel-plate waveguide (PPW) is proposed. The method is well suited for frequency-selective surface (FSS)-based absorbers. By employing the PPW structure, only a small sample size, i.e., 1-D array of FSS, is required for the measurement. The thru-reflect-line (TRL) calibration is implemented to remove the time-gating ambiguity in the conventional PPW-based method. A measurement system working up to 6 GHz is designed such that its length is adjustable to ensure all three calibration standards (thru, reflect, and line) can be carried out in a single device. Moreover, the height of the PPW is also adjustable to allow the measurement of absorbers with a different periodicity of FSSs. Two single-layer FSS-based absorbers with different periodicity are fabricated and measured. The results agree well with the conventional free-space measurement system, which validates the proposed method.

International Journal of Management and Accounting, 2020

With the advancement of the tourism industry, the importance of research on visitor satisfaction ... more With the advancement of the tourism industry, the importance of research on visitor satisfaction has been increasing as of recent years. The prime objective of the current study is to explore the factors influencing visitor satisfaction from the perspective of archaeological sites, in Bangladesh. A thorough and well-constructed research design is administered to analyze 200 data collected from the visitors having experience in visiting Paharpur Buddha Vihara. From the data, we conducted an extensive analysis to find out the main factors which influence visitor satisfaction. It is recognized that there are some essential factors; destination attractions, safety and security, favorable environment, food attraction, and cost at said destination. These factors significantly influence visitor satisfaction. It is expected that the outcome of the study will support the tourism practitioners in planning and development for successful business operations. The paper concludes with some implic...

Materiali in tehnologije, Feb 14, 2017

In this paper a metamaterial-embedded, compact microstrip-fed patch antenna is introduced for mic... more In this paper a metamaterial-embedded, compact microstrip-fed patch antenna is introduced for microwave C-band applications. The proposed antenna is composed of a rectangular metamaterial-embedded patch, microstrip-fed line and a partial ground plane. The finite-integration technique (FIT) based on Computer Simulation Technology (CST) Microwave Studio is utilized in this study. The measurements of antenna performances are conducted in a near-field measurement laboratory. The antenna performance parameters comprising the reflection coefficient, radiation efficiency, gain, and radiation pattern are studied to validate the antenna performance. The measured results show that the proposed metamaterial-embedded antenna exhibits a wide impedance bandwidth over the C band (from 3.77 GHz to 6.58 GHz). The results also indicate good radiation efficiency and antenna gain with a nearly omni-directional radiation pattern at the frequencies of interest.

Journal of Business and Economics, 2015

Work-family conflict (WFC) is a universal issue irrespective of the countries and cultures all ov... more Work-family conflict (WFC) is a universal issue irrespective of the countries and cultures all over the world. But the nature and extent are likely to be different in different societies with different cultural characteristics. This paper is an attempt to identify the factors that result in WFC of female employees working at different universities, commercial banks and government organizations in Bangladesh. WFC is a common issue and produces negative effects for the employees, their families, and work organizations. It is more severe for the female employees compare to male employees in the traditional society like Bangladesh. Female participation in the work place is gradually increasing over the last few decades. Working women are encountering role conflict because of family responsibilities. This study is based on primary data. A sample of 50 female employees from ten organizations is selected and they are asked to unearth the key factors that lead to work-family conflict. The data are gathered by administering questionnaires. The study shows that the main variables responsible for WFC are: long working hour, job inflexibility, work overload, child care responsibility, age of children, dependent care responsibility, discrimination at work place, inadequate supervisory support, autocratic management style, inadequate family support, and the absence of husband's support. The findings of the study emphasized the need to formulate guidelines for the management of WFC at the organizational level as it is connected to job satisfaction and performance of the employees.

Materials Science, 2016

Cellular phones are used in the vicinity of a human head, which absorbs power from antenna radiat... more Cellular phones are used in the vicinity of a human head, which absorbs power from antenna radiation. This investigation analyzes the effects of antenna substrate materials on electromagnetic (EM) absorption in a human head. Antennas are used in analysis with four different dielectric substrate materials, which are Bakelite, FR4 glass epoxy, Rogers R04003, and Taconic TLC. Moreover, two different thicknesses of each substrate are considered in the experimental setup. The EM absorption associated with two types of cell phone antennas is evaluated in the closed vicinity of the human head model. One of them is planar inverted-F antenna (PIFA), which is used as the internal handset antenna and another one is helical antenna, which is used as external handset antenna. This investigation consists of two different operating frequency bands, GSM 900 MHz and DCS 1800 MHz. The EM absorption in the human head is presented using the peak specific absorption rate (SAR) and total absorbed power (TAP) by the user. The finite-difference time-domain (FDTD) method based on Computer Simulation Technology (CST) Microwave studio is utilized in this investigation. The obtained results show that the substrate materials do not effect SAR and TAP values considerably for both antennas, but substrate thickness affects the SAR and TAP values significantly. In addition, the substrate thickness affects the SAR and TAP values significantly in most of the cases Moreover, PIFA produces lower SAR than that of a helical antenna significantly for both GSM and DCS frequency band.

International Journal of Applied Electromagnetics and Mechanics, 2015

A new design and analysis of cellular phone casing based on shielding technique is presented in t... more A new design and analysis of cellular phone casing based on shielding technique is presented in this study to reduce the EM absorption in the human head. A dual band PIFA is designed to operate at 900 MHz and 1900 MHz GSM frequency bands as an internal handset antenna. The specific absorption rate (SAR) in the human head and total absorbed power by the cell phone user are calculated along with antenna performances. It is found that the SAR in the head is reduced due to the proposed casing considerably for both the lower and upper frequency bands. The new mobile casing provides 48.2% reduction in the SAR at 900 MHz and 44.8% reduction at 1900 MHz. In addition, the mobile casing improves the radiation efficiency for 6% and 7% in comparison with without casing configuration at the lower and upper GSM frequency bands respectively.

Biomedical Engineering / Biomedizinische Technik, 2017

This paper represents a comparative study on electromagnetic (EM) absorption in the human head be... more This paper represents a comparative study on electromagnetic (EM) absorption in the human head between a printed monopole antenna and a planar inverted-F antenna (PIFA). The specific absorption rate (SAR) values and total absorbed power in the human head phantom are used to evaluate EM absorption for both antennae. Moreover, antenna performances in terms of return loss, radiation efficiency, and gain are also investigated in this study. The finite integration technique (FIT) based on CST Microwave studio and SAM head phantom are used in this study. The antenna performances are measured in an anechoic chamber and the SAR is tested using COMOSAR measurement system. The obtained results indicate that the printed monopole antenna lead to higher EM absorption in the human head as compared to PIFA for both GSM frequencies.

Journal of US-China Public Administration, 2015

This paper aims at examining the importance of cordial and high-level cooperation between managem... more This paper aims at examining the importance of cordial and high-level cooperation between management and employees, as identical partners in industrial advancement and progress. There is a legislative obligation to form a participative committee at the industrial enterprises in Bangladesh to achieve labor-management cooperation, but the majority of the executives mainly in the private sector, have ill-treated this prerequisite of regulation. Based on an interview with a good number of respondents (managers, union leaders, experts, and political leaders), the study has attempted to identify the obstacles that stand in the way of cohesive cooperation between these two parties. The important factors deterring collaboration according to the respondents are: mutual mistrust between management and labor, class distinction between managers and employees, labor disputes, politicization of labor unions resulting in intra-and inter-union rivalries, worker's backwardness, problem of determination of a collective bargaining agent, and infringement of labor laws, among others. Because of these factors, this committee has not yielded effective results. The prevailing climate is not encouraging cooperation, rather inhibiting the same. Finally, some suggestions such as top management support and commitment, confidence in people, employment security, trust, adequate information, reward, friendly working environment, acceptance of change, interaction between managers and employees, and timely feedback have been recommended which may help create congenial labor-management cooperation at the plant level as a means of establishing industrial peace and achieving higher productivity.

Applied Computational Electromagnetics Society Journal

In this paper, a new design of cell phone body is presented to reduce the specific absorption rat... more In this paper, a new design of cell phone body is presented to reduce the specific absorption rate (SAR) in the human head. The SAR in the human head and total absorbed power by the cell phone user are calculated along with antenna performances in terms of radiation efficiency and directivity to validate the effects of cell phone body. It is found that the SAR in the head is reduced significantly for both the lower and upper global systems for mobile (GSM) frequency band. The new mobile body provides 63.8% reduction in the SAR at 900 MHz and 69.2% reduction at 1800 MHz in comparison of without mobile cover configuration. Moreover, the mobile casing improves the radiation efficiency 6% and 7% in the lower and the upper GSM frequency band respectively.

2015 2nd International Conference on Biomedical Engineering (ICoBE), 2015

ABSTRACT The aim of this paper is to investigate the effects of the distance between the human he... more ABSTRACT The aim of this paper is to investigate the effects of the distance between the human head and internal cellular device antenna on the specific absorption rate (SAR). The effects of the metal-glass casing of mobile phone on the SAR values were observed in the vicinity of the human head model. Additionally, the reflection coefficients were investigated in all cases to evaluate antenna performance. This analysis was performed by adopting finite-difference time-domain (FDTD) method on Computer Simulation Technology (CST) Microwave Studio. The results indicate that by increasing the distance between the user's head and antenna, SAR values are decreased.

International Journal of Applied Electromagnetics and Mechanics, 2015

In this paper, a metamaterial embedded planar inverted-F antenna (PIFA) is proposed for cellular ... more In this paper, a metamaterial embedded planar inverted-F antenna (PIFA) is proposed for cellular phone. A dual band PIFA is designed to operate both GSM 900 MHz and DCS 1800 MHz. The ground plane of conventional PIFA is modified using a double negative (DNG) metamaterial array. The investigation is performed using the Finite Integration Technique (FIT) of CST Microwave Studio. The specific absorption rate (SAR) values are calculated considering two different holding positions-cheek and tilt. The results indicate that the proposed metamaterial embedded antenna produces lower SAR in the human head compared to conventional PIFA. Moreover, the modified antenna substrate leads to slight improvement of the antenna performances.