Md kamrul Hassan - Academia.edu (original) (raw)

Papers by Md kamrul Hassan

Sustainability

The paper presents the investigated results of bolt-coupler connections under compression experim... more The paper presents the investigated results of bolt-coupler connections under compression experimentally. Bolt-coupler connections have been developed recently for prefabricated column-to-column (PCC) connections to simplify the construction process of prefabricated concrete-filled steel tubular (CFST) columns and to transfer the upper column load to the bottom column through bolt-coupler connections. However, the behaviour of bolt-coupler connections under compression has not been investigated in the past although there are some experimental and numerical studies conducted on bolt-coupler connections under tension. To address these research gaps, the behaviour of bolt-coupler connections under compression has been investigated. The main parameters considered in this study are bolt diameters (M16, M20, M24), bolt grades (8.8, 10.9 grade), gap inside the coupler between two bolts of bolt-coupler connection (0, 10, 20 mm), and coupler grade (5.6, 8.8 grade). It is observed that the ul...

Fire

This paper investigates aluminium composite panels (ACPs) to understand the fire behaviour of com... more This paper investigates aluminium composite panels (ACPs) to understand the fire behaviour of combustible cladding systems under different fire scenarios. A fire dynamics simulator (FDS) is used to develop the numerical model of full-scale fire tests of combustible cladding systems using the procedures of the British BS 8414.1 standards. The results obtained from the FDS models are verified with test data. Seven test scenarios are investigated with four distinct parameters, i.e., cavity barrier, air-cavity gap, panel mounting (with and without joining gaps between the panels), and material combustibility qualities. A critical air-cavity gap (50–100 mm) is established at which maximum fire spread is noticed. Furthermore, variations in the cavity barrier, panel mounting, and material combustibility significantly impact the rapid fire spread of ACP cladding systems and the internal failure criterion. The results from the present study can serve as a basis for future research on the ful...

Prefabricated construction has been rising dramatically in the construction industry in recent ti... more Prefabricated construction has been rising dramatically in the construction industry in recent times. On the other hand, it is equally complicated and laborious to design and install the prefabricated structures on site. The reason behind this can be credited to the limited design guidelines available and the massive structural parts. This research has been carried out to overcome shortcomings of the prefabricated composite construction. In this paper, the idea of discontinuous beams and a beam-to-beam connection system has been proposed for the prefabricated construction. Modified splice plate bolted connection has been suggested for the discontinuous beams. The proposed connection is similar to splice plate bolted connection, but welding between splice plate and beam web is introduced. This paper mainly investigated the behaviour of modified splice plate bolted connections using finite element (FE) analysis and compared its results with continuous beam. Based on FE modelling resul...

Fire

The energy efficiency of buildings drives the replacement of traditional construction materials w... more The energy efficiency of buildings drives the replacement of traditional construction materials with lightweight insulating materials. However, energy-efficient but combustible insulation might contribute to the building’s fire load. Therefore, it is necessary to analyse the reaction-to-fire properties of various insulating materials to provide a better understanding of designing a fire-safe structure. In this study, reaction-to-fire tests were carried out to assess the fire behaviour of lightweight polystyrene insulating panels commonly employed in high-rise buildings. The flammability characteristics of expanded polystyrene (EPS) and extruded polystyrene (XPS) were determined using a cone calorimeter under two distinct external irradiance regimes, 35 kW/m2 and 50 kW/m2, to approximate small to medium fire exposure situations. To investigate the effect of a fire-rated (FR) foil layer on a sandwich panel, three distinct test configurations were used: (i) sample without FR layer (sta...

Journal of the Japanese Society of Pediatric Surgeons, 2009

... Hospital. Hanif Abdul; Department of Pediatric Surgery, Dhaka Medical College Hospital. Hasin... more ... Hospital. Hanif Abdul; Department of Pediatric Surgery, Dhaka Medical College Hospital. Hasina Kaniz; Department of Pediatric Surgery, Dhaka Medical College Hospital. Rahman Mahmudur; Department of Pediatric Surgery, Dhaka Medical College Hospital. Talukder Shah-Alam ...

Journal of the Japanese Society of Pediatric Surgeons, 2009

... Abdul Hanif; Department of Pediatric Surgery, Dhaka Medical College Hospital. Talukder Shah-A... more ... Abdul Hanif; Department of Pediatric Surgery, Dhaka Medical College Hospital. Talukder Shah-Alam; Department of Pediatric Surgery, Dhaka Medical College Hospital. Alam Mahbub-ul; Department of Pediatric Surgery, Dhaka Medical College Hospital. ...

Innovative Infrastructure Solutions, 2021

The structural behaviour of the cold-formed steel (CFS) wall panels under flexural loading is nor... more The structural behaviour of the cold-formed steel (CFS) wall panels under flexural loading is normally characterised by buckling modes, deflection, flexural stiffness. This research mainly investigates these fundamental behaviours of CFS wall panels at elastic limits where four-point bending loading has been incorporated into the panels. The paper presents the results of the experimental and numerical studies of the composite CFS wall panels. Three specimens are tested, and then the finite element (FE) model has been developed and validated by comparing its results with test data. A parametric study has been conducted to investigate the composite behaviour of CFS wall panels with different combinations of CFS studs and gypsum plasterboards. The test and FE model results demonstrate that back-to-back CFS studs can be used to overcome the buckling problem for light load-bearing wall panels due to their higher rigidity. It is found that stud types and gypsum plasterboard have a significant influence on the elastic behaviour and failure modes of the CFS wall panels.

The use of Cold-formed Steel (CFS) has rapidly increased in recent times in building construction... more The use of Cold-formed Steel (CFS) has rapidly increased in recent times in building construction as CFS wall frame panels due to their simple forming procedure and easy to assemble Most common CFS sections used in wall panel are C-channel and Z-sections. The behaviour of CFS is different from other steel known as hot-rolled steel. The structural behaviour of CFS wall frame panels subjected to flexural loading are normally characterised by many buckling modes which have not yet been completely understood. Buckling modes under flexural loading are generally either eliminated or delayed to increase the ultimate bending capacity of the members. So, it is very important to understand the behaviour of CFS under bending loading. This research studies the behaviour of coldformed steel under flexural loading and an extensive four-point bending test (FPBT) are considered. This research mainly investigates the fundamental behaviour of CFS wall frame panels under elastic limits to further unde...

Examining the understandings of and responses to anthropogenic climate change is important to hel... more Examining the understandings of and responses to anthropogenic climate change is important to help climatically vulnerable communities enhance their resilience. Lack of climate change understanding is an obstacle to appropriate climate response. Social understandings of climate change consist of general awareness, knowledge, and risk perceptions. Responses to climate change are derived from the understandings of the members of a society about the impacts and risks of climate change. The typical strategies in response to climate change are mitigation, adaptation, and resilience building. Responding to climate change is necessary at every scale to enhance the resilience of social and ecological systems. Climate change responses driven by management agencies are often helpful for vulnerable marginal communities, but not all the management interventions contribute to resilience equally.

Cold-form Steel Section has been known for its high strength due to high strength to weight ratio... more Cold-form Steel Section has been known for its high strength due to high strength to weight ratio. Cold form steel (CFS) sections are used for load bearing primary members in substantial structures like high storey building and bridges, and non-bearing structural elements like composite roofing, slab decks and wall panels. Limited experimental study on CFS sections for wall panel has been conducted, which is not sufficient to understand its behaviour. As experimental investigation conducted on CFS sections for wall panel is expensive and time consuming, the development of FE models, well validated against experimental data, would be form a useful alternative to overcome any experimental limitations. In this paper, parametric study using finite element (FE) analysis has been conducted to investigate the behaviour of the CFS sections for wall panel under flexural loading. The FE model is validated by comparing the FE model results with test results. The extensive parametric study is c...

Journal of the Japanese Society of Pediatric Surgeons, 2012

Faridpur Medical College Journal, 2021

Optimal growth and development of a child depends mostly on proper breastfeeding and complementar... more Optimal growth and development of a child depends mostly on proper breastfeeding and complementary feeding practices. However, many children yet suffer from malnutrition and the recommended practices of complementary feeding have yet not been established among the majority of the population. In this observational study, we looked for the causes behind the improper complementary feeding practices among the mothers attending the outdoor and indoor units of the Department of Pediatrics, Faridpur Medical College Hospital, Faridpur, Bangladesh, from January 2018 to January 2019. A total of 447 mothers were interviewed regarding their complementary feeding practices and data were analyzed to find out the demographic and social influences. The majority of the respondents were between the age group of 21-25 years (54%). Thirty five percent were illiterate, 60% were from the rural area, 78% were housewives, 64% came from a nuclear family, and 87% had a monthly family income of 5000-20000. Mo...

Materials, 2021

Over the years, leaked fluids from aircraft have caused severe deterioration of airfield pavement... more Over the years, leaked fluids from aircraft have caused severe deterioration of airfield pavement. The combined effect of hot exhaust from the auxiliary power unit of military aircraft and spilt aviation oils have caused rapid pavement spalling. If the disintegrated concreted pieces caused by spalling are sucked into the jet engine, they may cause catastrophic damage to the aircraft engine or physical injury to maintenance crews. This study investigates the effectiveness of incorporating hybrid fibres into ordinary concrete to improve the residual mechanical and thermal properties to prevent spalling damage of pavement. Three fibre-reinforced concrete samples were made with micro steel fibre and polyvinyl alcohol fibre with a fibre content of zero, 0.3%, 0.5% and 0.7% by volume fraction. These samples were exposed to recurring high temperatures and aviation oils. Tests were conducted to measure the effects of repeated exposure on the concrete’s mechanical, thermal and chemical chara...

Journal of Pharmaceutical Health Care and Sciences, 2019

Background: Ritodrine hydrochloride (RD), a β2-adrenergic agonist, is widely used as a tocolytic ... more Background: Ritodrine hydrochloride (RD), a β2-adrenergic agonist, is widely used as a tocolytic medication to suppress premature labor, but can cause neonatal hypoglycemia, a potentially severe side effect. We examined the incidence and risk factors of neonatal hypoglycemia following maternal intravenous administration of RD. Methods: This was a retrospective study of neonates, who had birth weight of ≥2000 g and were delivered at 36 weeks gestation or later in Kanazawa University Hospital from August 2013 to July 2016. We defined neonatal hypoglycemia as blood glucose level < 50 mg/dL. Neonates who were delivered without maternal intravenous RD or who were delivered 8 days or more after stopping maternal RD or who received oral RD were defined as the RD non-administration group, while those delivered within 7 days after stopping maternal RD were defined as the RD intravenous administration group. We examined the incidence and risk factors of RD-induced neonatal hypoglycemia by comparing these two groups. Results: We enrolled 603 neonates in this study; 504 (83.6%) showed no neonatal hypoglycemia, while 99 (16.4%) exhibited neonatal hypoglycemia. The incidence of neonatal hypoglycemia was significantly higher (61.7%; 58/94) in the RD intravenous administration group than in the RD non-administration group (8.1%; 41/509) (p < 0.001). Binomial logistic regression analysis in the RD intravenous administration group showed that maternal age over 35 years (AOR: 3.385; 95% CI, 1.082-10.588, p = 0.036) and the interval to delivery from stopping intravenous administration of RD (AOR: 0.974; 95% CI, 0.953-0.996, p = 0.020) were independent factors associated with neonatal hypoglycemia. The cutoff value of the interval to predict the incidence of neonatal hypoglycemia was about 6 h (sensitivity 82.8%, specificity 63.9%). Conclusions: The incidence of neonatal hypoglycemia was significantly increased by maternal intravenous administration of RD. We newly identified maternal age (over 35 years) and the interval to delivery from stopping intravenous administration of RD (within 6 h) as independent risk factors for neonatal hypoglycemia following maternal intravenous administration of RD. In cases with these risk factors, careful blood glucose monitoring is recommended for early detection and treatment of neonatal hypoglycemia.

Applied Sciences, 2019

A building structure comprising a prefabricated lightweight concrete-filled steel tubular (CFST) ... more A building structure comprising a prefabricated lightweight concrete-filled steel tubular (CFST) framework composite slab structure is proposed. Five full-scale specimens (i.e., one empty framework and four-walled frameworks) were tested under reversed cyclic loading to study their earthquake-resistance performance. Of the four wall specimens, three were walled using composite slabs, one had no openings, one had a window opening, and one had a door opening. One was walled with a concealed steel-truss slab. A comparative study on the strength, stiffness, ductility, hysteresis characteristics, and dissipated energy of the specimens was performed. The working mechanism of the framework and slab was then analyzed. The results show that, if reasonably assembled and connected, the framework and slab work in a well-coordinated manner. The walled framework had greater lateral load-bearing capacity, better energy-dissipation, greater stiffness reduction, and better deformability than an empt...

Physical Review E, 1996

We present two classes of exact solutions to a geometric model which describes the kinetics of fr... more We present two classes of exact solutions to a geometric model which describes the kinetics of fragmentation of d-dimensional hypercuboid-shaped objects. The first class of exact solutions is described by a fragmentation rate a(x 1 , ..., x d) = 1 and daughter distribution function b(x 1 , .., x d |x ′ a daughter distribution function b(x 1 , .., x d |x ′ 1 , ..., x ′ d) = 2 d δ(x 1 − x ′ 1 /2)...δ(x d − x ′ d /2). Each class of exact solutions is analyzed in detail for the presence of scaling solutions and the occurrence of shattering transitions; the results of these analyses are also presented.

Faridpur Medical College Journal, 2016

Collodion baby describes a highly characteristic clinical entity in newborns encased in a yellowi... more Collodion baby describes a highly characteristic clinical entity in newborns encased in a yellowish translucent membrane resembling collodion. In most cases the condition either precedes the development of one of a variety of ichthyoses, the commonest of which are lamellar ichthyosis and non-bullous ichthyosiform erythroderma, or occasionally represents an initial phase of other ichthyoses such as ichthyosis vulgaris. In at least 10% of all cases of collodion baby, the condition is followed by a mild ichthyosis of lamellar type, so mild as to be considered more or less normal, so-called self-healing collodion baby or 'lamellar ichthyosis of the newborn'. In this report, we present a severe form of ichthyosis.

Chin Phys Lett, 2005

A systematic approach is presented to find a linear system associated with the sine-Gordon equati... more A systematic approach is presented to find a linear system associated with the sine-Gordon equation from a given set of super Riccati systems. The Riccati system is shown to be related to the super Bäcklund transformation and the linear eigenvalue problem.

Salim R a and Hassan K Exploring the Relationship Between Population Age Structure and Real Exchange Rate in Oecd Countries in 5th Global Business and Social Science Research Conference 25 26 June 2012 Beijing China Pp 1 30, 2012

This article examines the impact of population age structure on the real exchange rate. Data on a... more This article examines the impact of population age structure on the real exchange rate. Data on a panel of 23 OECD countries over 1980-2009 period are used to estimate the empirical model. The results show that the shares of working age and old dependent population have significant appreciating effects while the share of young dependent has a significant depreciating effect on the real exchange rate. These results have important policy implications given the fact that population is aging in almost all the OECD economies these days.

Australian Journal of Agricultural and Resource Economics, 2015

This paper examines the role of communication technologies (CTs) in Australian broadacre agricult... more This paper examines the role of communication technologies (CTs) in Australian broadacre agricultural production using data over the period of 1990-2013. Allowing for cross-sectional independence in the data, the pooled mean group and augmented mean group techniques are applied to estimate dynamic relationships among variables. The empirical results demonstrate that CTs affect agricultural output positively in the long run. The estimated elasticity is 0.237. This result suggests that government policies that lift investment in telecommunication facilities are shown to contribute to an increase of output in Australia's broadacre agriculture in the long run.

Sustainability

The paper presents the investigated results of bolt-coupler connections under compression experim... more The paper presents the investigated results of bolt-coupler connections under compression experimentally. Bolt-coupler connections have been developed recently for prefabricated column-to-column (PCC) connections to simplify the construction process of prefabricated concrete-filled steel tubular (CFST) columns and to transfer the upper column load to the bottom column through bolt-coupler connections. However, the behaviour of bolt-coupler connections under compression has not been investigated in the past although there are some experimental and numerical studies conducted on bolt-coupler connections under tension. To address these research gaps, the behaviour of bolt-coupler connections under compression has been investigated. The main parameters considered in this study are bolt diameters (M16, M20, M24), bolt grades (8.8, 10.9 grade), gap inside the coupler between two bolts of bolt-coupler connection (0, 10, 20 mm), and coupler grade (5.6, 8.8 grade). It is observed that the ul...

Fire

This paper investigates aluminium composite panels (ACPs) to understand the fire behaviour of com... more This paper investigates aluminium composite panels (ACPs) to understand the fire behaviour of combustible cladding systems under different fire scenarios. A fire dynamics simulator (FDS) is used to develop the numerical model of full-scale fire tests of combustible cladding systems using the procedures of the British BS 8414.1 standards. The results obtained from the FDS models are verified with test data. Seven test scenarios are investigated with four distinct parameters, i.e., cavity barrier, air-cavity gap, panel mounting (with and without joining gaps between the panels), and material combustibility qualities. A critical air-cavity gap (50–100 mm) is established at which maximum fire spread is noticed. Furthermore, variations in the cavity barrier, panel mounting, and material combustibility significantly impact the rapid fire spread of ACP cladding systems and the internal failure criterion. The results from the present study can serve as a basis for future research on the ful...

Prefabricated construction has been rising dramatically in the construction industry in recent ti... more Prefabricated construction has been rising dramatically in the construction industry in recent times. On the other hand, it is equally complicated and laborious to design and install the prefabricated structures on site. The reason behind this can be credited to the limited design guidelines available and the massive structural parts. This research has been carried out to overcome shortcomings of the prefabricated composite construction. In this paper, the idea of discontinuous beams and a beam-to-beam connection system has been proposed for the prefabricated construction. Modified splice plate bolted connection has been suggested for the discontinuous beams. The proposed connection is similar to splice plate bolted connection, but welding between splice plate and beam web is introduced. This paper mainly investigated the behaviour of modified splice plate bolted connections using finite element (FE) analysis and compared its results with continuous beam. Based on FE modelling resul...

Fire

The energy efficiency of buildings drives the replacement of traditional construction materials w... more The energy efficiency of buildings drives the replacement of traditional construction materials with lightweight insulating materials. However, energy-efficient but combustible insulation might contribute to the building’s fire load. Therefore, it is necessary to analyse the reaction-to-fire properties of various insulating materials to provide a better understanding of designing a fire-safe structure. In this study, reaction-to-fire tests were carried out to assess the fire behaviour of lightweight polystyrene insulating panels commonly employed in high-rise buildings. The flammability characteristics of expanded polystyrene (EPS) and extruded polystyrene (XPS) were determined using a cone calorimeter under two distinct external irradiance regimes, 35 kW/m2 and 50 kW/m2, to approximate small to medium fire exposure situations. To investigate the effect of a fire-rated (FR) foil layer on a sandwich panel, three distinct test configurations were used: (i) sample without FR layer (sta...

Journal of the Japanese Society of Pediatric Surgeons, 2009

... Hospital. Hanif Abdul; Department of Pediatric Surgery, Dhaka Medical College Hospital. Hasin... more ... Hospital. Hanif Abdul; Department of Pediatric Surgery, Dhaka Medical College Hospital. Hasina Kaniz; Department of Pediatric Surgery, Dhaka Medical College Hospital. Rahman Mahmudur; Department of Pediatric Surgery, Dhaka Medical College Hospital. Talukder Shah-Alam ...

Journal of the Japanese Society of Pediatric Surgeons, 2009

... Abdul Hanif; Department of Pediatric Surgery, Dhaka Medical College Hospital. Talukder Shah-A... more ... Abdul Hanif; Department of Pediatric Surgery, Dhaka Medical College Hospital. Talukder Shah-Alam; Department of Pediatric Surgery, Dhaka Medical College Hospital. Alam Mahbub-ul; Department of Pediatric Surgery, Dhaka Medical College Hospital. ...

Innovative Infrastructure Solutions, 2021

The structural behaviour of the cold-formed steel (CFS) wall panels under flexural loading is nor... more The structural behaviour of the cold-formed steel (CFS) wall panels under flexural loading is normally characterised by buckling modes, deflection, flexural stiffness. This research mainly investigates these fundamental behaviours of CFS wall panels at elastic limits where four-point bending loading has been incorporated into the panels. The paper presents the results of the experimental and numerical studies of the composite CFS wall panels. Three specimens are tested, and then the finite element (FE) model has been developed and validated by comparing its results with test data. A parametric study has been conducted to investigate the composite behaviour of CFS wall panels with different combinations of CFS studs and gypsum plasterboards. The test and FE model results demonstrate that back-to-back CFS studs can be used to overcome the buckling problem for light load-bearing wall panels due to their higher rigidity. It is found that stud types and gypsum plasterboard have a significant influence on the elastic behaviour and failure modes of the CFS wall panels.

The use of Cold-formed Steel (CFS) has rapidly increased in recent times in building construction... more The use of Cold-formed Steel (CFS) has rapidly increased in recent times in building construction as CFS wall frame panels due to their simple forming procedure and easy to assemble Most common CFS sections used in wall panel are C-channel and Z-sections. The behaviour of CFS is different from other steel known as hot-rolled steel. The structural behaviour of CFS wall frame panels subjected to flexural loading are normally characterised by many buckling modes which have not yet been completely understood. Buckling modes under flexural loading are generally either eliminated or delayed to increase the ultimate bending capacity of the members. So, it is very important to understand the behaviour of CFS under bending loading. This research studies the behaviour of coldformed steel under flexural loading and an extensive four-point bending test (FPBT) are considered. This research mainly investigates the fundamental behaviour of CFS wall frame panels under elastic limits to further unde...

Examining the understandings of and responses to anthropogenic climate change is important to hel... more Examining the understandings of and responses to anthropogenic climate change is important to help climatically vulnerable communities enhance their resilience. Lack of climate change understanding is an obstacle to appropriate climate response. Social understandings of climate change consist of general awareness, knowledge, and risk perceptions. Responses to climate change are derived from the understandings of the members of a society about the impacts and risks of climate change. The typical strategies in response to climate change are mitigation, adaptation, and resilience building. Responding to climate change is necessary at every scale to enhance the resilience of social and ecological systems. Climate change responses driven by management agencies are often helpful for vulnerable marginal communities, but not all the management interventions contribute to resilience equally.

Cold-form Steel Section has been known for its high strength due to high strength to weight ratio... more Cold-form Steel Section has been known for its high strength due to high strength to weight ratio. Cold form steel (CFS) sections are used for load bearing primary members in substantial structures like high storey building and bridges, and non-bearing structural elements like composite roofing, slab decks and wall panels. Limited experimental study on CFS sections for wall panel has been conducted, which is not sufficient to understand its behaviour. As experimental investigation conducted on CFS sections for wall panel is expensive and time consuming, the development of FE models, well validated against experimental data, would be form a useful alternative to overcome any experimental limitations. In this paper, parametric study using finite element (FE) analysis has been conducted to investigate the behaviour of the CFS sections for wall panel under flexural loading. The FE model is validated by comparing the FE model results with test results. The extensive parametric study is c...

Journal of the Japanese Society of Pediatric Surgeons, 2012

Faridpur Medical College Journal, 2021

Optimal growth and development of a child depends mostly on proper breastfeeding and complementar... more Optimal growth and development of a child depends mostly on proper breastfeeding and complementary feeding practices. However, many children yet suffer from malnutrition and the recommended practices of complementary feeding have yet not been established among the majority of the population. In this observational study, we looked for the causes behind the improper complementary feeding practices among the mothers attending the outdoor and indoor units of the Department of Pediatrics, Faridpur Medical College Hospital, Faridpur, Bangladesh, from January 2018 to January 2019. A total of 447 mothers were interviewed regarding their complementary feeding practices and data were analyzed to find out the demographic and social influences. The majority of the respondents were between the age group of 21-25 years (54%). Thirty five percent were illiterate, 60% were from the rural area, 78% were housewives, 64% came from a nuclear family, and 87% had a monthly family income of 5000-20000. Mo...

Materials, 2021

Over the years, leaked fluids from aircraft have caused severe deterioration of airfield pavement... more Over the years, leaked fluids from aircraft have caused severe deterioration of airfield pavement. The combined effect of hot exhaust from the auxiliary power unit of military aircraft and spilt aviation oils have caused rapid pavement spalling. If the disintegrated concreted pieces caused by spalling are sucked into the jet engine, they may cause catastrophic damage to the aircraft engine or physical injury to maintenance crews. This study investigates the effectiveness of incorporating hybrid fibres into ordinary concrete to improve the residual mechanical and thermal properties to prevent spalling damage of pavement. Three fibre-reinforced concrete samples were made with micro steel fibre and polyvinyl alcohol fibre with a fibre content of zero, 0.3%, 0.5% and 0.7% by volume fraction. These samples were exposed to recurring high temperatures and aviation oils. Tests were conducted to measure the effects of repeated exposure on the concrete’s mechanical, thermal and chemical chara...

Journal of Pharmaceutical Health Care and Sciences, 2019

Background: Ritodrine hydrochloride (RD), a β2-adrenergic agonist, is widely used as a tocolytic ... more Background: Ritodrine hydrochloride (RD), a β2-adrenergic agonist, is widely used as a tocolytic medication to suppress premature labor, but can cause neonatal hypoglycemia, a potentially severe side effect. We examined the incidence and risk factors of neonatal hypoglycemia following maternal intravenous administration of RD. Methods: This was a retrospective study of neonates, who had birth weight of ≥2000 g and were delivered at 36 weeks gestation or later in Kanazawa University Hospital from August 2013 to July 2016. We defined neonatal hypoglycemia as blood glucose level < 50 mg/dL. Neonates who were delivered without maternal intravenous RD or who were delivered 8 days or more after stopping maternal RD or who received oral RD were defined as the RD non-administration group, while those delivered within 7 days after stopping maternal RD were defined as the RD intravenous administration group. We examined the incidence and risk factors of RD-induced neonatal hypoglycemia by comparing these two groups. Results: We enrolled 603 neonates in this study; 504 (83.6%) showed no neonatal hypoglycemia, while 99 (16.4%) exhibited neonatal hypoglycemia. The incidence of neonatal hypoglycemia was significantly higher (61.7%; 58/94) in the RD intravenous administration group than in the RD non-administration group (8.1%; 41/509) (p < 0.001). Binomial logistic regression analysis in the RD intravenous administration group showed that maternal age over 35 years (AOR: 3.385; 95% CI, 1.082-10.588, p = 0.036) and the interval to delivery from stopping intravenous administration of RD (AOR: 0.974; 95% CI, 0.953-0.996, p = 0.020) were independent factors associated with neonatal hypoglycemia. The cutoff value of the interval to predict the incidence of neonatal hypoglycemia was about 6 h (sensitivity 82.8%, specificity 63.9%). Conclusions: The incidence of neonatal hypoglycemia was significantly increased by maternal intravenous administration of RD. We newly identified maternal age (over 35 years) and the interval to delivery from stopping intravenous administration of RD (within 6 h) as independent risk factors for neonatal hypoglycemia following maternal intravenous administration of RD. In cases with these risk factors, careful blood glucose monitoring is recommended for early detection and treatment of neonatal hypoglycemia.

Applied Sciences, 2019

A building structure comprising a prefabricated lightweight concrete-filled steel tubular (CFST) ... more A building structure comprising a prefabricated lightweight concrete-filled steel tubular (CFST) framework composite slab structure is proposed. Five full-scale specimens (i.e., one empty framework and four-walled frameworks) were tested under reversed cyclic loading to study their earthquake-resistance performance. Of the four wall specimens, three were walled using composite slabs, one had no openings, one had a window opening, and one had a door opening. One was walled with a concealed steel-truss slab. A comparative study on the strength, stiffness, ductility, hysteresis characteristics, and dissipated energy of the specimens was performed. The working mechanism of the framework and slab was then analyzed. The results show that, if reasonably assembled and connected, the framework and slab work in a well-coordinated manner. The walled framework had greater lateral load-bearing capacity, better energy-dissipation, greater stiffness reduction, and better deformability than an empt...

Physical Review E, 1996

We present two classes of exact solutions to a geometric model which describes the kinetics of fr... more We present two classes of exact solutions to a geometric model which describes the kinetics of fragmentation of d-dimensional hypercuboid-shaped objects. The first class of exact solutions is described by a fragmentation rate a(x 1 , ..., x d) = 1 and daughter distribution function b(x 1 , .., x d |x ′ a daughter distribution function b(x 1 , .., x d |x ′ 1 , ..., x ′ d) = 2 d δ(x 1 − x ′ 1 /2)...δ(x d − x ′ d /2). Each class of exact solutions is analyzed in detail for the presence of scaling solutions and the occurrence of shattering transitions; the results of these analyses are also presented.

Faridpur Medical College Journal, 2016

Collodion baby describes a highly characteristic clinical entity in newborns encased in a yellowi... more Collodion baby describes a highly characteristic clinical entity in newborns encased in a yellowish translucent membrane resembling collodion. In most cases the condition either precedes the development of one of a variety of ichthyoses, the commonest of which are lamellar ichthyosis and non-bullous ichthyosiform erythroderma, or occasionally represents an initial phase of other ichthyoses such as ichthyosis vulgaris. In at least 10% of all cases of collodion baby, the condition is followed by a mild ichthyosis of lamellar type, so mild as to be considered more or less normal, so-called self-healing collodion baby or 'lamellar ichthyosis of the newborn'. In this report, we present a severe form of ichthyosis.

Chin Phys Lett, 2005

A systematic approach is presented to find a linear system associated with the sine-Gordon equati... more A systematic approach is presented to find a linear system associated with the sine-Gordon equation from a given set of super Riccati systems. The Riccati system is shown to be related to the super Bäcklund transformation and the linear eigenvalue problem.

Salim R a and Hassan K Exploring the Relationship Between Population Age Structure and Real Exchange Rate in Oecd Countries in 5th Global Business and Social Science Research Conference 25 26 June 2012 Beijing China Pp 1 30, 2012

This article examines the impact of population age structure on the real exchange rate. Data on a... more This article examines the impact of population age structure on the real exchange rate. Data on a panel of 23 OECD countries over 1980-2009 period are used to estimate the empirical model. The results show that the shares of working age and old dependent population have significant appreciating effects while the share of young dependent has a significant depreciating effect on the real exchange rate. These results have important policy implications given the fact that population is aging in almost all the OECD economies these days.

Australian Journal of Agricultural and Resource Economics, 2015

This paper examines the role of communication technologies (CTs) in Australian broadacre agricult... more This paper examines the role of communication technologies (CTs) in Australian broadacre agricultural production using data over the period of 1990-2013. Allowing for cross-sectional independence in the data, the pooled mean group and augmented mean group techniques are applied to estimate dynamic relationships among variables. The empirical results demonstrate that CTs affect agricultural output positively in the long run. The estimated elasticity is 0.237. This result suggests that government policies that lift investment in telecommunication facilities are shown to contribute to an increase of output in Australia's broadacre agriculture in the long run.