Tran Thao - Academia.edu (original) (raw)
Papers by Tran Thao
In this note we study a state estimation of a Markovian semimartingale from a doubly stochastic p... more In this note we study a state estimation of a Markovian semimartingale from a doubly stochastic point process observation.
For different reasons, inoculation of legumes with rhizobia is not widely practiced in Myanmar an... more For different reasons, inoculation of legumes with rhizobia is not widely practiced in Myanmar and Vietnam, although both countries are major legume producers. In Myanmar, there are problems in the whole supply chain from production and quality assurance (QA) to distribution to ...
The aim of this note is to introduce an approximate approach to fractional filtering problems, wh... more The aim of this note is to introduce an approximate approach to fractional filtering problems, where either the signal process or observation process, or both are perturbed by a fractional noise. Approximate filtering equations are established and the true filtering is considered as the limit case of approximate filterings. martingale nor a Markov process. In contrary, it exhibits a long-range dependence. Some approaches to fractional stochastic calculus have been introduced by L. Coutin, L. Decreusefond, W. Dai, C. Heyde, Lin, A.S.Üstünel, D. Feyel, de La Pradelle, T. Duncan, B. Duncan (refer for example to [1, 2, 3]) A fractional Brownian motion has been considered also by C. Ciesielski and al. as a special sequence of random functions in some Orlicz-Besov space [4].
Language in Society, 1986
The limit equilibrium method (LEM) was used to back analyze the performance of three full-scale t... more The limit equilibrium method (LEM) was used to back analyze the performance of three full-scale test embankments constructed over soft Bangkok clay. The control embankment was unreinforced while the other two embankments were reinforced with multiple layers of low-strength geotextile and with a single layer of highstrength geotextile, respectively. The analyses results confirmed the embankment performance indicating a two-stage failure mode of the reinforced embankments, namely: (i) the critical stage followed by (ii) the collapse stage. The critical stage occurred at the onset of plastic deformation of the soft clay foundation. The collapse stage occurred at the onset of embankment collapse when the reinforcement was on the verge of experiencing tensile failure or rupture. The critical reinforcement strain at the critical stage was independent of geotextile stiffness and on subsoil conditions and was 2.5 to 3%. The localized strain corresponds to the mobilized strain at the collapse stage in excess of the critical strain and can be estimated using a new method requiring two parameters: the in-soil stiffness and the reinforcement inclination factor. Back-analyses confirmed the horizontal and bisectional directions of reinforcement tensile force corresponding to the critical and collapse heights, respectively.
Pharmaceutical Research
In addition to a number of highly soluble drugs, most new chemical entities under development are... more In addition to a number of highly soluble drugs, most new chemical entities under development are poorly water-soluble drugs generally characterized by an insufficient dissolution rate and a small absorption window, leading to the low bioavailability. Controlled-release (CR) formulations have several potential advantages over conventional dosage forms, such as providing a uniform and prolonged therapeutic effect to improve patient compliance, reducing the frequency of dosing, minimizing the number of side effects, and reducing the strength of the required dose while increasing the effectiveness of the drug. Solid dispersions (SD) can be used to enhance the dissolution rate of poorly water-soluble drugs and to sustain the drug release by choosing an appropriate carrier. Thus, a CR-SD comprises both functions of SD and CR for poorly water-soluble drugs. Such CR dosage forms containing SD provide an immediately available dose for an immediate action followed by a gradual and continuous release of subsequent doses to maintain the plasma concentration of poorly water-soluble drugs over an extended period of time. This review aims to summarize all currently known aspects of controlled release systems containing solid dispersions, focusing on the preparation methods, mechanisms of action and characterization of physicochemical properties of the system.
Archives of Physical Medicine and Rehabilitation, 2003
Objective: To compare the demographics and functional outcome for Asian Americans and whites trea... more Objective: To compare the demographics and functional outcome for Asian Americans and whites treated at a Traumatic Brain Injury Model Systems (TBIMS) center. Design: Prospective, single-center trial. Participants: 30 Asian Americans and 133 whites admitted to a TBIMS ...
Journal of The Korean Statistical Society, 2009
In this paper, we introduce an approximate approach to the fractional integrated GARCH(1,1) model... more In this paper, we introduce an approximate approach to the fractional integrated GARCH(1,1) model of continuous time perturbed by fractional noise. Based on the L 2approximation of this noise by semimartingales, we proved a convergence theorem concerning an approximate solution. A simulation example shows a significant reduction of error in a fractional stock price model as compared to the classical stock price model.
Journal of Korean Pharmaceutical Sciences, 2009
In this note we study a state estimation of a Markovian semimartingale from a doubly stochastic p... more In this note we study a state estimation of a Markovian semimartingale from a doubly stochastic point process observation.
For different reasons, inoculation of legumes with rhizobia is not widely practiced in Myanmar an... more For different reasons, inoculation of legumes with rhizobia is not widely practiced in Myanmar and Vietnam, although both countries are major legume producers. In Myanmar, there are problems in the whole supply chain from production and quality assurance (QA) to distribution to ...
The aim of this note is to introduce an approximate approach to fractional filtering problems, wh... more The aim of this note is to introduce an approximate approach to fractional filtering problems, where either the signal process or observation process, or both are perturbed by a fractional noise. Approximate filtering equations are established and the true filtering is considered as the limit case of approximate filterings. martingale nor a Markov process. In contrary, it exhibits a long-range dependence. Some approaches to fractional stochastic calculus have been introduced by L. Coutin, L. Decreusefond, W. Dai, C. Heyde, Lin, A.S.Üstünel, D. Feyel, de La Pradelle, T. Duncan, B. Duncan (refer for example to [1, 2, 3]) A fractional Brownian motion has been considered also by C. Ciesielski and al. as a special sequence of random functions in some Orlicz-Besov space [4].
Language in Society, 1986
The limit equilibrium method (LEM) was used to back analyze the performance of three full-scale t... more The limit equilibrium method (LEM) was used to back analyze the performance of three full-scale test embankments constructed over soft Bangkok clay. The control embankment was unreinforced while the other two embankments were reinforced with multiple layers of low-strength geotextile and with a single layer of highstrength geotextile, respectively. The analyses results confirmed the embankment performance indicating a two-stage failure mode of the reinforced embankments, namely: (i) the critical stage followed by (ii) the collapse stage. The critical stage occurred at the onset of plastic deformation of the soft clay foundation. The collapse stage occurred at the onset of embankment collapse when the reinforcement was on the verge of experiencing tensile failure or rupture. The critical reinforcement strain at the critical stage was independent of geotextile stiffness and on subsoil conditions and was 2.5 to 3%. The localized strain corresponds to the mobilized strain at the collapse stage in excess of the critical strain and can be estimated using a new method requiring two parameters: the in-soil stiffness and the reinforcement inclination factor. Back-analyses confirmed the horizontal and bisectional directions of reinforcement tensile force corresponding to the critical and collapse heights, respectively.
Pharmaceutical Research
In addition to a number of highly soluble drugs, most new chemical entities under development are... more In addition to a number of highly soluble drugs, most new chemical entities under development are poorly water-soluble drugs generally characterized by an insufficient dissolution rate and a small absorption window, leading to the low bioavailability. Controlled-release (CR) formulations have several potential advantages over conventional dosage forms, such as providing a uniform and prolonged therapeutic effect to improve patient compliance, reducing the frequency of dosing, minimizing the number of side effects, and reducing the strength of the required dose while increasing the effectiveness of the drug. Solid dispersions (SD) can be used to enhance the dissolution rate of poorly water-soluble drugs and to sustain the drug release by choosing an appropriate carrier. Thus, a CR-SD comprises both functions of SD and CR for poorly water-soluble drugs. Such CR dosage forms containing SD provide an immediately available dose for an immediate action followed by a gradual and continuous release of subsequent doses to maintain the plasma concentration of poorly water-soluble drugs over an extended period of time. This review aims to summarize all currently known aspects of controlled release systems containing solid dispersions, focusing on the preparation methods, mechanisms of action and characterization of physicochemical properties of the system.
Archives of Physical Medicine and Rehabilitation, 2003
Objective: To compare the demographics and functional outcome for Asian Americans and whites trea... more Objective: To compare the demographics and functional outcome for Asian Americans and whites treated at a Traumatic Brain Injury Model Systems (TBIMS) center. Design: Prospective, single-center trial. Participants: 30 Asian Americans and 133 whites admitted to a TBIMS ...
Journal of The Korean Statistical Society, 2009
In this paper, we introduce an approximate approach to the fractional integrated GARCH(1,1) model... more In this paper, we introduce an approximate approach to the fractional integrated GARCH(1,1) model of continuous time perturbed by fractional noise. Based on the L 2approximation of this noise by semimartingales, we proved a convergence theorem concerning an approximate solution. A simulation example shows a significant reduction of error in a fractional stock price model as compared to the classical stock price model.
Journal of Korean Pharmaceutical Sciences, 2009