ayub ali - Academia.edu (original) (raw)
Papers by ayub ali
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This study deals with construction of intervention models for the share index data of Banks and O... more This study deals with construction of intervention models for the share index data of Banks and Other Financial Institutions in Bangladesh. Intervention model is constructed for time series data and its comparison is done with ARIMA model. In our study we established superiority of intervention model over the ARIMA model. Using the share index data, we have shown that due to existence of external events, intervention model has lower residual variance and fits the data better.
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Pakistan Journal of Medical Sciences, 2013
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This chapter presents the results of sediment analysis at Jebel Ali Harbor, Dubai, United Arab Em... more This chapter presents the results of sediment analysis at Jebel Ali Harbor, Dubai, United Arab Emirates, to establish a sediment quality baseline for the ecosystem. Another objective of the study was to set a target for sediment quality that will sustain the health of the aquatic ecosystem for the long term. Sediments in the harbor were collected from different stations over two periods: a screening phase and a monitoring phase. Sediments were analyzed for a spectrum of parameters. Results showed that sediments in the harbor are characterized by a fine texture containing clay and silt different from what is found at a reference location in the Arabian Gulf. It appeared that sulfide, phosphorus, and total petroleum hydrocarbons (TPHs) levels are higher in sediments located in the inner and outer basins of the harbor compared with sediments in the main channel. Many metals are at higher levels in harbor sediments than those found in sediments from the reference location and are at hig...
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The possibilityof use of a singlehybridization temperatureinsteadof different temperaturefor diff... more The possibilityof use of a singlehybridization temperatureinsteadof different temperaturefor differentprobes for detectionof humangroup A rotavirus(HRV)was ex- plored. The sensitivityand specificityof the 5 oligonucleotide probes were assessed using cell culture adapted rotavirus (RV) strains by carrying out hybridization at a fixed temperatureof 50. The results obtainedindicatethat a single hybridizationtemperature may be used for all the probes with virtuallyno decreasein specificityand sensitivity.
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Epidemiology: Open Access, 2016
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Annals of Human Biology, 2007
Biological variables in height growth in Japanese singletons are well documented, but there has b... more Biological variables in height growth in Japanese singletons are well documented, but there has been less research on Japanese twins. The study investigated the biological variables in height growth of Japanese twins and compared them with those of Japanese singletons. Samples of 92 boys and 99 girls from monozygotic twins, and 41 boys and 38 girls from dizygotic twins born in 1960-1973, from the Twin Class in the Junior and Senior High Schools affiliated to the University of Tokyo, Japan, were considered. The Bayes modal estimation method was applied to the triphasic generalized logistic growth model (BTT model). From the fitted model, the biological variables were extracted. The monozygotic twins, on average, matured earlier than dizygotic twins, but later than singletons. Until pre-adolescence, the height velocity of twin children is lower than that of singleton children. This results in the final stature of twin youths being smaller than that of singleton youths. The twins are, on average, about 2.6 cm smaller than singletons in final height only due to the lower velocity during birth to pre-adolescence. Comparing with the average final stature of dizygotic children, the boys were 3.9 cm and the girls were 2.8 cm shorter than Japanese late-maturing boys and girls, respectively. For monozygotic children, the boys were 3.8 cm and the girls were 3.0 cm shorter than the respective Japanese late-matured singleton boys and girls. The biological variables of twins differ significantly from those of singletons. It is important to recognize that singleton reference values do not correctly reflect the growth of twins.
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American Journal of Human Biology, 2001
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Bookmarks Related papers MentionsView impact
This study deals with construction of intervention models for the share index data of Banks and O... more This study deals with construction of intervention models for the share index data of Banks and Other Financial Institutions in Bangladesh. Intervention model is constructed for time series data and its comparison is done with ARIMA model. In our study we established superiority of intervention model over the ARIMA model. Using the share index data, we have shown that due to existence of external events, intervention model has lower residual variance and fits the data better.
Bookmarks Related papers MentionsView impact
Pakistan Journal of Medical Sciences, 2013
Bookmarks Related papers MentionsView impact
This chapter presents the results of sediment analysis at Jebel Ali Harbor, Dubai, United Arab Em... more This chapter presents the results of sediment analysis at Jebel Ali Harbor, Dubai, United Arab Emirates, to establish a sediment quality baseline for the ecosystem. Another objective of the study was to set a target for sediment quality that will sustain the health of the aquatic ecosystem for the long term. Sediments in the harbor were collected from different stations over two periods: a screening phase and a monitoring phase. Sediments were analyzed for a spectrum of parameters. Results showed that sediments in the harbor are characterized by a fine texture containing clay and silt different from what is found at a reference location in the Arabian Gulf. It appeared that sulfide, phosphorus, and total petroleum hydrocarbons (TPHs) levels are higher in sediments located in the inner and outer basins of the harbor compared with sediments in the main channel. Many metals are at higher levels in harbor sediments than those found in sediments from the reference location and are at hig...
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The possibilityof use of a singlehybridization temperatureinsteadof different temperaturefor diff... more The possibilityof use of a singlehybridization temperatureinsteadof different temperaturefor differentprobes for detectionof humangroup A rotavirus(HRV)was ex- plored. The sensitivityand specificityof the 5 oligonucleotide probes were assessed using cell culture adapted rotavirus (RV) strains by carrying out hybridization at a fixed temperatureof 50. The results obtainedindicatethat a single hybridizationtemperature may be used for all the probes with virtuallyno decreasein specificityand sensitivity.
Bookmarks Related papers MentionsView impact
Epidemiology: Open Access, 2016
Bookmarks Related papers MentionsView impact
Annals of Human Biology, 2007
Biological variables in height growth in Japanese singletons are well documented, but there has b... more Biological variables in height growth in Japanese singletons are well documented, but there has been less research on Japanese twins. The study investigated the biological variables in height growth of Japanese twins and compared them with those of Japanese singletons. Samples of 92 boys and 99 girls from monozygotic twins, and 41 boys and 38 girls from dizygotic twins born in 1960-1973, from the Twin Class in the Junior and Senior High Schools affiliated to the University of Tokyo, Japan, were considered. The Bayes modal estimation method was applied to the triphasic generalized logistic growth model (BTT model). From the fitted model, the biological variables were extracted. The monozygotic twins, on average, matured earlier than dizygotic twins, but later than singletons. Until pre-adolescence, the height velocity of twin children is lower than that of singleton children. This results in the final stature of twin youths being smaller than that of singleton youths. The twins are, on average, about 2.6 cm smaller than singletons in final height only due to the lower velocity during birth to pre-adolescence. Comparing with the average final stature of dizygotic children, the boys were 3.9 cm and the girls were 2.8 cm shorter than Japanese late-maturing boys and girls, respectively. For monozygotic children, the boys were 3.8 cm and the girls were 3.0 cm shorter than the respective Japanese late-matured singleton boys and girls. The biological variables of twins differ significantly from those of singletons. It is important to recognize that singleton reference values do not correctly reflect the growth of twins.
Bookmarks Related papers MentionsView impact
American Journal of Human Biology, 2001
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