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Search Results: 1 - 10 of 2756 matches for " Tran Thi Phuong "
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Normal Sally modules of rank one
Phuong Tran Thi
Mathematics , 2015,
Abstract: In this paper, we explore the structure of the normal Sally modules of rank one with respect to an $\m$-primary ideal in a Nagata reduced local ring which is not necessary Cohen-Macaulay. As an application of this result, when the base ring is Cohen-Macaulay analytically unramified, the extremal bound on the first normal Hilbert coefficient leads to the Cohen-Macaulayness of the associated graded rings with respect to a normal filtration.
Current Status of Sludge Collection, Transportation and Treatment in Ho Chi Minh City  [PDF]
Nguyen Trung Viet, Tran Thi My Dieu, Nguyen Thi Phuong Loan
Journal of Environmental Protection (JEP) , 2013, DOI: 10.4236/jep.2013.412154

In the process of construction and development, Ho Chi Minh City is discharging about six types of sludge: 1) sludge from urban wastewater drainage systems; 2) sludge from industrial wastewater drainage system; 3) sludge from the canal dredging activities periodically; 4) sludge from septic tanks; 5) sludge from the water treatment station/plant; 6) sludge from the construction sites. Sludge’s components are very different among types of sludge, sludge from the sewer network and canal dredging contain mainly sand and soil (70% - 90% dry weight), while the sludge from the wastewater/water treatment station/plant and from septic tanks contain mainly biodegradable organic substances (55% - 80% dry weight). The concentrations of all above-mentioned sludge (except sludge from the hazardous industrial wastewater treatment plant) are lower than toxic threshold. The volume of total sludge is about 3000 - 4000 m3/day (5000 - 6000 tons/day), excepting the amount of sludge generated from the water treatment plant (which is collected and treated separately). Sludge from wastewater treatment plants and septic tanks is collected, transported and recycled to become organic fertilizer. The other types of sludge are collected, transported, and disposed at the unknown” locations, even though they have different values

Sequentially Cohen-Macaulay Rees algebras
Naoki Taniguchi,Tran Thi Phuong,Nguyen Thi Dung,Tran Nguyen An
Mathematics , 2014,
Abstract: This paper studies the question of when the Rees algebras associated to arbitrary filtration of ideals are sequentially Cohen-Macaulay. Although this problem has been already investigated by N. T. Cuong, S. Goto and H. L. Truong, their situation is quite a bit of restricted, so we are eager to try the generalization of their results.
Topics on sequentially Cohen-Macaulay modules
Naoki Taniguchi,Tran Thi Phuong,Nguyen Thi Dung,Tran Nguyen An
Mathematics , 2015,
Abstract: In this paper, we study the two different topics related to sequentially Cohen-Macaulay modules. The questions are when the sequentially Cohen-Macaulay property preserve the localization and the module-finite extension of rings.
Patient Satisfaction with HIV/AIDS Care and Treatment in the Decentralization of Services Delivery in Vietnam
Bach Xuan Tran, Nhung Phuong Thi Nguyen
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0046680
Abstract: Objective We evaluated the patient satisfaction with HIV/AIDS care and treatment and its determinants across levels of health service administration in Vietnam. Methods We interviewed 1016 patients at 7 hospitals and health centers in three epicenters, including Hanoi, Hai Phong, and Ho Chi Minh City. The Satisfaction with HIV/AIDS Treatment Interview Scale (SATIS) was developed, and 3 dimensions were constructed using factor analysis, namely “Quality and Convenience”; “Availability and Responsiveness”; and “Competence of health care workers”. Results In a band score of (0; 10), the mean scores of all domains were large; it was the highest in “Competence of health workers” (9.34±0.84), and the lowest in “Quality and Convenience” (9.03±1.04). The percentages of respondents completely satisfied with overall service quality and treatment outcomes were 42.4% and 18.8%, respectively. In multivariate analysis, factors related to higher satisfaction included female sex, older age, and living with spouses or partners. Meanwhile, lower satisfaction was found among patients who were attending provincial and district clinics; in the richest group; had higher CD4 count; and drug users. Conclusion This study highlights the importance of improving the quality of HIV/AIDS services at the provincial and district clinics. Potential strategies include capacity building for health workers, integrative service delivery, engagements of family members in treatment supports, and additional attention and comprehensive care for drug users with HIV/AIDS.
Estimating fractional stochastic volatility
Hoang Thi Phuong Thao,Tran Hung Thao
International Journal of Contemporary Mathematical Sciences , 2012,
An explicit estimate on multiplicity truncation in the second main theorem for holomorphic curves encountering hypersurfaces in general position in projective space
Ta Thi Hoai An,Ha Tran Phuong
Mathematics , 2007,
Abstract: Yan and Chen proved a weak Cartan-type second main theorem for holomorphic curves meeting hypersurfaces in projective space that included truncated counting functions. Here we give an explicit estimate for the level of truncation.
Almost Gorenstein rings
Shiro Goto,Naoyuki Matsuoka,Tran Thi Phuong
Mathematics , 2011,
Abstract: The notion of almost Gorenstein ring given by Barucci and Fr{\"o}berg \cite{BF} in the case where the local rings are analytically unramified is generalized, so that it works well also in the case where the rings are analytically ramified. As a sequel, the problem of when the endomorphism algebra $\m : \m$ of $\m$ is a Gorenstein ring is solved in full generality, where $\m$ denotes the maximal ideal in a given Cohen-Macaulay local ring of dimension one. Characterizations of almost Gorenstein rings are given in connection with the principle of idealization. Examples are explored.
Phytochemical Constituents and Determination of Resveratrol from the Roots of Arachis hypogea L.  [PDF]
Tuyen Pham Nguyen Kim, Nga Vo Thi, Phuong Tran Van, Phuong Quach Ngo Diem, Duong Ngo Thi Thuy, Quang Ton That, Phung Nguyen Kim Phi
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.412291

Two triterpenoid saponins, 6, 7, together with five known compounds were isolated from the roots of Arachis hypogea L. collected in Vietnam. Their structures were established by spectroscopic analysis (1D, 2D NMR and HRMS) as well as by comparison with those reported in the literature. Furthermore, the high content of resveratrol in the roots opens a new potential resource for pharmaceutical companies to prepare medicines from the wasted peanut roots.

Quasi-socle ideals in local rings with Gorenstein tangent cones
Shiro Goto,Satou Kimura,Naoyuki Matsuoka,Tran Thi Phuong
Mathematics , 2007,
Abstract: Quasi-socle ideals, that is the ideals $I$ of the form $I= Q : \mathfrak{m}^q$ in a Noetherian local ring $(A, \mathfrak{m})$ with the Gorenstein tangent cone $\mathrm{G}(\mathfrak{m}) = \bigoplus_{n \geq 0}{\mathfrak{m}}^n/{\mathfrak{m}}^{n+1}$ are explored, where $q \geq 1$ is an integer and $Q$ is a parameter ideal of $A$ generated by monomials of a system $x_1, x_2, ..., x_d$ of elements in $A$ such that $(x_1, x_2, ..., x_d)$ is a reduction of $\mathfrak{m}$. The questions of when $I$ is integral over $Q$ and of when the graded rings $\mathrm{G}(I) = \bigoplus_{n \geq 0}I^n/I^{n+1}$ and $\mathrm{F}(I) = \bigoplus_{n \ge 0}I^n/\mathfrak{m} I^n$ are Cohen-Macaulay are answered. Criteria for $\mathrm{G} (I)$ and $\mathcal{R} (I) = \bigoplus_{n \geq 0}I^n$ to be Gorenstein rings are given.
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