kamal uddin - Academia.edu (original) (raw)

Papers by kamal uddin

Sustainability

This study focuses on better development of green buildings. The key to the sustainable developme... more This study focuses on better development of green buildings. The key to the sustainable development of the construction industry is to popularize and promote the spread of green building technologies (GBTS) in the construction market. This study integrates the technology acceptance model (TAM) and the innovation diffusion theory (IDT) to analyze and construct the theoretical model of developers’ GBTS adoption behavior from three dimensions, including the individual factor, product factor and interface factor. This paper discusses the mechanism of GBTS adoption and diffusion in the construction market. The data are collected by questionnaire, and the structural equation model (SEM) is used for empirical analysis. The results show that the developers’ perceived usefulness (PU) and perceived ease of use (PEOU) of GBTS, developers’ innovativeness and sense of community at the individual level, competitive advantage at the product level, as well as government structural guarantees and re...

Bangladesh Journal of Neuroscience, 2013

This cross sectional study was done from April 2005 to November 2009 in the department of Neurosu... more This cross sectional study was done from April 2005 to November 2009 in the department of Neurosurgery of Chittagong Medical College Hospital. We have studied 20 patients of D12, L1, L2 & L3 fracture with lower limb weakness. Data were collected by a brief history, clinical examination, surgery & postoperative follow up. Most of the sufferers were male (90.00%). The age groups were 21-40 years gripped the major proportion (50.00%) of the patients. The commonest causes of injury were fall from height (60.00%). The majority of patients had been suffering from L1 fracture (45.00%). The most (90.00%) of the sufferers had parapareses. The highest groups of patients (90.00%) improved after surgery. So, the study concludes that the anterolateral decompression, fusion & fixation is one of the best options of treatment of throracolumbar spine fracture.Bangladesh Journal of Neuroscience 2012; Vol. 28 (1): 24-28

International Journal of Molecular Sciences, 2012

The main objective of this research was to appraise the changes in mineral content and antioxidan... more The main objective of this research was to appraise the changes in mineral content and antioxidant attributes of Portulaca oleracea over different growth stages. The antioxidant activity was measured using 1,1-diphenyl-2-picrylhydrazyl (DPPH), ferric-reducing antioxidant power (FRAP) assays. The iodine titration method was used to determine the ascorbic acid content (AAC). DPPH scavenging (IC 50) capacity ranged from 1.30 ± 0.04 to 1.71 ± 0.04 mg/mL, while the ascorbic acid equivalent antioxidant activity (AEAC) values were 229.5 ± 7.9 to 319.3 ± 8.7 mg AA/100 g, total phenol content (TPC) varied from 174.5 ± 8.5 to 348.5 ± 7.9 mg GAE/100 g. AAC 60.5 ± 2.1 to 86.5 ± 3.9 mg/100 g and FRAP 1.8 ± 0.1 to 4.3 ± 0.1 mg GAE/g. There was good correlation between the results of TPC and AEAC, and between IC 50 and FRAP assays (r 2 > 0.9). The concentrations of Ca, Mg, K, Fe and Zn increased with plant maturity. Calcium (Ca) was negatively correlated with sodium (Na) and chloride (Cl), but positively correlated with magnesium (Mg), potassium (K), iron (Fe) and zinc (Zn). Portulaca olerecea cultivars could be used as a source of minerals and antioxidants, especially for functional food and nutraceutical applications.

Monthly Notices of the Royal Astronomical Society, 2011

We present five new pulsating subdwarf B (sdB) stars discovered by the Kepler spacecraft during t... more We present five new pulsating subdwarf B (sdB) stars discovered by the Kepler spacecraft during the asteroseismology survey phase. We perform time-series analysis on the nearly continuous month-long Kepler datasets of these 5 objects; these datasets provide nearly aliasfree time-series photometry at unprecedented precision. Following an iterative prewhitening process we derive the pulsational frequency spectra of these stars, separating out artefacts of known instrumental origin. We find that these new pulsating sdB stars are multiperiodic long-period pulsators of the V1093 Her type, with the number of periodicities ranging from 8 (KIC 8302197) to 53 (KIC 11558725). The frequencies and amplitudes are typical of g-mode pulsators of this type. We do not find any evidence for binarity in the five stars from their observed pulsation frequencies. As these are g−mode pulsators, we briefly looked for period spacings for mode identification, and found average spacings about 260 s and 145 s. This may indicate l = 1 and 2 patterns. Some modes may show evidence of rotational splitting. These discoveries complete the list of compact pulsators found in the survey phase. Of the 13 compact pulsators, only one star was identified as a short-period (p-mode) V361 Hya pulsator, while all other new pulsators turned out to be V1093 Her class objects. Among the latter objects, two of them seemed to be pure V1093 Her while the others show additional low amplitude peaks in the p−mode frequency range, suggesting their hybrid nature. Authenticity of these peaks will be tested with longer runs currently under analysis.

The Astrophysical Journal, 2011

Scaling relations that link asteroseismic quantities to global stellar properties are important f... more Scaling relations that link asteroseismic quantities to global stellar properties are important for gaining understanding of the intricate physics that underpins stellar pulsation. The common notion that all stars in an open cluster have essentially the same distance, age, and initial composition, implies that the stellar parameters can be measured to much higher precision than what is usually achievable for single stars. This makes clusters ideal for exploring the relation between the mode amplitude of solar-like oscillations and the global stellar properties. We have analyzed data obtained with NASA's Kepler space telescope to study solar-like oscillations in 100 red giant stars located in either of the three open clusters, NGC 6791, NGC 6819, and NGC 6811. By fitting the measured amplitudes to predictions from simple scaling relations that depend on luminosity, mass, and effective temperature, we find that the data cannot be described by any power of the luminosity-to-mass ratio as previously assumed. As a result we provide a new improved empirical relation which treats luminosity and mass separately. This relation turns out to also work remarkably well for main-sequence and subgiant stars. In addition, the measured amplitudes reveal the potential presence of a number of previously unknown unresolved binaries in the red clump in NGC 6791 and NGC 6819, pointing to an interesting new application for asteroseismology as a probe into the formation history of open clusters.

Journal of Vision, 2005

The present study examined how attention shift involved in the construction of visual space in me... more The present study examined how attention shift involved in the construction of visual space in memory. We employed a spatial cueing paradigm in which an inner or outer (6 or 12 deg eccentric, respectively) landmark was vanished with a variable SOA (or remained) to ...

Abstract In this paper, we present a generic solution for context based self-adaptation of produc... more Abstract In this paper, we present a generic solution for context based self-adaptation of production systems. We describe the overall architecture of the proposed system, as well as its components. Furthermore, we illustrate how this architecture is being used to extract ...

This paper reports the discovery and characterization of the transiting hot giant exoplanet Keple... more This paper reports the discovery and characterization of the transiting hot giant exoplanet Kepler-17b. The planet has an orbital period of 1.486 days, and radial velocity measurements from the Hobby-Eberly Telescope show a Doppler signal of 419.5 +13.3 −15.6 m s −1. From a transit-based estimate of the host star's mean density, combined with an estimate of the stellar effective temperature T eff =5630 ± 100 from high-resolution spectra, we infer a stellar host mass of 1.06 ± 0.07 M ⊙ and a stellar radius of 1.02 ± 0.03 R ⊙. We estimate the planet mass and radius to be M P = 2.45 ± 0.11 M J and R P = 1.31 ± 0.02 R J. The host star is active, with dark spots that are frequently occulted by the planet. The continuous monitoring of the star reveals a stellar rotation period of 11.89 days, 8 times the the planet's orbital period; this period ratio produces stroboscopic effects on the occulted starspots. The temporal pattern of these spot-crossing events shows that the planet's orbit is prograde and the star's obliquity is smaller than 15 •. We detected planetary occultations of Kepler-17b with both the Kepler and Spitzer Space Telescopes. We use these observations to constrain the eccentricity, e, and find that it is consistent with a circular orbit (e < 0.011). The brightness temperatures of the planet the infrared bandpasses are T 3.6 µm =1880 ± 100 K and T 4.5 µm =1770 ± 150 K. We measure the optical geometric albedo A g in the Kepler bandpass and find A g = 0.10 ± 0.02. The observations are best described by atmospheric models for which most of the incident energy is re-radiated away from the day side.

Weed Technology, 2010

A field survey was conducted in 2007 to characterize weed populations in different turfgrass site... more A field survey was conducted in 2007 to characterize weed populations in different turfgrass sites throughout the Klang Valley of western Peninsular Malaysia. Sites included golf course putting greens, athletic fields, sod farms, and residential lawns. Weeds present in each site were identified and the data were used to calculate frequency, distribution uniformity, density, relative abundance, and community coefficient values for each species. Seventy-nine weed species, belonging to 16 families, were found. The most species were found on residential lawns, and the fewest were found on golf course putting greens; athletic fields and sod farms ranked intermediately. A total of 19 different weed species were classified as major (relative abundance ≥ 15), and abundance rankings varied by turfgrass area. Greater kyllinga had the highest relative abundance values on athletic fields (45.5) and golf course putting greens (71.5), and the second highest value (21.7) on residential lawns. Forked fringerush and annual sedge had the greatest relative abundance values on residential lawns and sod farms, respectively. Cogongrass was reported on 15% of the residential lawns evaluated. The heterogeneity of weed species composition suggests that control strategies will vary by turfgrass use area. Quantifying weed population dynamics will help researchers delineate integrated weed management strategies to turfgrass managers in Malaysia.

Sustainability

This study focuses on better development of green buildings. The key to the sustainable developme... more This study focuses on better development of green buildings. The key to the sustainable development of the construction industry is to popularize and promote the spread of green building technologies (GBTS) in the construction market. This study integrates the technology acceptance model (TAM) and the innovation diffusion theory (IDT) to analyze and construct the theoretical model of developers’ GBTS adoption behavior from three dimensions, including the individual factor, product factor and interface factor. This paper discusses the mechanism of GBTS adoption and diffusion in the construction market. The data are collected by questionnaire, and the structural equation model (SEM) is used for empirical analysis. The results show that the developers’ perceived usefulness (PU) and perceived ease of use (PEOU) of GBTS, developers’ innovativeness and sense of community at the individual level, competitive advantage at the product level, as well as government structural guarantees and re...

Bangladesh Journal of Neuroscience, 2013

This cross sectional study was done from April 2005 to November 2009 in the department of Neurosu... more This cross sectional study was done from April 2005 to November 2009 in the department of Neurosurgery of Chittagong Medical College Hospital. We have studied 20 patients of D12, L1, L2 & L3 fracture with lower limb weakness. Data were collected by a brief history, clinical examination, surgery & postoperative follow up. Most of the sufferers were male (90.00%). The age groups were 21-40 years gripped the major proportion (50.00%) of the patients. The commonest causes of injury were fall from height (60.00%). The majority of patients had been suffering from L1 fracture (45.00%). The most (90.00%) of the sufferers had parapareses. The highest groups of patients (90.00%) improved after surgery. So, the study concludes that the anterolateral decompression, fusion & fixation is one of the best options of treatment of throracolumbar spine fracture.Bangladesh Journal of Neuroscience 2012; Vol. 28 (1): 24-28

International Journal of Molecular Sciences, 2012

The main objective of this research was to appraise the changes in mineral content and antioxidan... more The main objective of this research was to appraise the changes in mineral content and antioxidant attributes of Portulaca oleracea over different growth stages. The antioxidant activity was measured using 1,1-diphenyl-2-picrylhydrazyl (DPPH), ferric-reducing antioxidant power (FRAP) assays. The iodine titration method was used to determine the ascorbic acid content (AAC). DPPH scavenging (IC 50) capacity ranged from 1.30 ± 0.04 to 1.71 ± 0.04 mg/mL, while the ascorbic acid equivalent antioxidant activity (AEAC) values were 229.5 ± 7.9 to 319.3 ± 8.7 mg AA/100 g, total phenol content (TPC) varied from 174.5 ± 8.5 to 348.5 ± 7.9 mg GAE/100 g. AAC 60.5 ± 2.1 to 86.5 ± 3.9 mg/100 g and FRAP 1.8 ± 0.1 to 4.3 ± 0.1 mg GAE/g. There was good correlation between the results of TPC and AEAC, and between IC 50 and FRAP assays (r 2 > 0.9). The concentrations of Ca, Mg, K, Fe and Zn increased with plant maturity. Calcium (Ca) was negatively correlated with sodium (Na) and chloride (Cl), but positively correlated with magnesium (Mg), potassium (K), iron (Fe) and zinc (Zn). Portulaca olerecea cultivars could be used as a source of minerals and antioxidants, especially for functional food and nutraceutical applications.

Monthly Notices of the Royal Astronomical Society, 2011

We present five new pulsating subdwarf B (sdB) stars discovered by the Kepler spacecraft during t... more We present five new pulsating subdwarf B (sdB) stars discovered by the Kepler spacecraft during the asteroseismology survey phase. We perform time-series analysis on the nearly continuous month-long Kepler datasets of these 5 objects; these datasets provide nearly aliasfree time-series photometry at unprecedented precision. Following an iterative prewhitening process we derive the pulsational frequency spectra of these stars, separating out artefacts of known instrumental origin. We find that these new pulsating sdB stars are multiperiodic long-period pulsators of the V1093 Her type, with the number of periodicities ranging from 8 (KIC 8302197) to 53 (KIC 11558725). The frequencies and amplitudes are typical of g-mode pulsators of this type. We do not find any evidence for binarity in the five stars from their observed pulsation frequencies. As these are g−mode pulsators, we briefly looked for period spacings for mode identification, and found average spacings about 260 s and 145 s. This may indicate l = 1 and 2 patterns. Some modes may show evidence of rotational splitting. These discoveries complete the list of compact pulsators found in the survey phase. Of the 13 compact pulsators, only one star was identified as a short-period (p-mode) V361 Hya pulsator, while all other new pulsators turned out to be V1093 Her class objects. Among the latter objects, two of them seemed to be pure V1093 Her while the others show additional low amplitude peaks in the p−mode frequency range, suggesting their hybrid nature. Authenticity of these peaks will be tested with longer runs currently under analysis.

The Astrophysical Journal, 2011

Scaling relations that link asteroseismic quantities to global stellar properties are important f... more Scaling relations that link asteroseismic quantities to global stellar properties are important for gaining understanding of the intricate physics that underpins stellar pulsation. The common notion that all stars in an open cluster have essentially the same distance, age, and initial composition, implies that the stellar parameters can be measured to much higher precision than what is usually achievable for single stars. This makes clusters ideal for exploring the relation between the mode amplitude of solar-like oscillations and the global stellar properties. We have analyzed data obtained with NASA's Kepler space telescope to study solar-like oscillations in 100 red giant stars located in either of the three open clusters, NGC 6791, NGC 6819, and NGC 6811. By fitting the measured amplitudes to predictions from simple scaling relations that depend on luminosity, mass, and effective temperature, we find that the data cannot be described by any power of the luminosity-to-mass ratio as previously assumed. As a result we provide a new improved empirical relation which treats luminosity and mass separately. This relation turns out to also work remarkably well for main-sequence and subgiant stars. In addition, the measured amplitudes reveal the potential presence of a number of previously unknown unresolved binaries in the red clump in NGC 6791 and NGC 6819, pointing to an interesting new application for asteroseismology as a probe into the formation history of open clusters.

Journal of Vision, 2005

The present study examined how attention shift involved in the construction of visual space in me... more The present study examined how attention shift involved in the construction of visual space in memory. We employed a spatial cueing paradigm in which an inner or outer (6 or 12 deg eccentric, respectively) landmark was vanished with a variable SOA (or remained) to ...

Abstract In this paper, we present a generic solution for context based self-adaptation of produc... more Abstract In this paper, we present a generic solution for context based self-adaptation of production systems. We describe the overall architecture of the proposed system, as well as its components. Furthermore, we illustrate how this architecture is being used to extract ...

This paper reports the discovery and characterization of the transiting hot giant exoplanet Keple... more This paper reports the discovery and characterization of the transiting hot giant exoplanet Kepler-17b. The planet has an orbital period of 1.486 days, and radial velocity measurements from the Hobby-Eberly Telescope show a Doppler signal of 419.5 +13.3 −15.6 m s −1. From a transit-based estimate of the host star's mean density, combined with an estimate of the stellar effective temperature T eff =5630 ± 100 from high-resolution spectra, we infer a stellar host mass of 1.06 ± 0.07 M ⊙ and a stellar radius of 1.02 ± 0.03 R ⊙. We estimate the planet mass and radius to be M P = 2.45 ± 0.11 M J and R P = 1.31 ± 0.02 R J. The host star is active, with dark spots that are frequently occulted by the planet. The continuous monitoring of the star reveals a stellar rotation period of 11.89 days, 8 times the the planet's orbital period; this period ratio produces stroboscopic effects on the occulted starspots. The temporal pattern of these spot-crossing events shows that the planet's orbit is prograde and the star's obliquity is smaller than 15 •. We detected planetary occultations of Kepler-17b with both the Kepler and Spitzer Space Telescopes. We use these observations to constrain the eccentricity, e, and find that it is consistent with a circular orbit (e < 0.011). The brightness temperatures of the planet the infrared bandpasses are T 3.6 µm =1880 ± 100 K and T 4.5 µm =1770 ± 150 K. We measure the optical geometric albedo A g in the Kepler bandpass and find A g = 0.10 ± 0.02. The observations are best described by atmospheric models for which most of the incident energy is re-radiated away from the day side.

Weed Technology, 2010

A field survey was conducted in 2007 to characterize weed populations in different turfgrass site... more A field survey was conducted in 2007 to characterize weed populations in different turfgrass sites throughout the Klang Valley of western Peninsular Malaysia. Sites included golf course putting greens, athletic fields, sod farms, and residential lawns. Weeds present in each site were identified and the data were used to calculate frequency, distribution uniformity, density, relative abundance, and community coefficient values for each species. Seventy-nine weed species, belonging to 16 families, were found. The most species were found on residential lawns, and the fewest were found on golf course putting greens; athletic fields and sod farms ranked intermediately. A total of 19 different weed species were classified as major (relative abundance ≥ 15), and abundance rankings varied by turfgrass area. Greater kyllinga had the highest relative abundance values on athletic fields (45.5) and golf course putting greens (71.5), and the second highest value (21.7) on residential lawns. Forked fringerush and annual sedge had the greatest relative abundance values on residential lawns and sod farms, respectively. Cogongrass was reported on 15% of the residential lawns evaluated. The heterogeneity of weed species composition suggests that control strategies will vary by turfgrass use area. Quantifying weed population dynamics will help researchers delineate integrated weed management strategies to turfgrass managers in Malaysia.