Designing Unicode-compliant Indic-script based Institutional Digital Repository with special reference to Bengali

Bijan Kumar Roy,Subal Chandra Biswas,Parthasarathi Mukhopadhyay 건국대학교 지식콘텐츠연구소 2018 International Journal of Knowledge Content Develop Vol.8 No.3

Local languages based information storage and retrieval system is essential for any online digital repository system. This paper reports the development of an interface in Bengali that allows users not only browsing and searching Indic‐script based documents but also allows administrator performing various system level operations. This paper briefly describes the origin and key characteristics of Indic‐scripts along with their encoding in Unicode standard with special reference to Bengali language. It also demonstrates the development processes of Bengal‐script based information representation and retrieval (IRR) system viz. BURA (Burdwan University Research Archive) using different open standard and open source software (OSS) including different factors essential for building such successful Indic‐script based multilingual digital libraries. The suggested strategies may help digital library developers to design an appropriate multi‐script based information access services in any other Indic‐script based languages.

Effects of Constrained Groove Pressing (CGP) on the plane stress fracture toughness of pure copper

Bijan Mohammadi,Marzieh Tavoli,Faramarz Djavanroodi 국제구조공학회 2014 Structural Engineering and Mechanics, An Int'l Jou Vol.52 No.5

Among severe plastic deformation methods, groove pressing is one of the prominent techniques for producing ultra-fine grained sheet materials. This process consists of imposing repetitive severe plastic deformation on the plate or sheet metals through alternate pressing. In the current study, a 2 mm pure Cu sheet has been subjected to repetitive shear deformation up to two passes. Hardness and tensile yield and ultimate stress were obtained after groove pressing. Fracture toughness tests have been performed and compared for three conditions of sheet material namely as received (initial annealed state), after one and two passes of groove pressing. Results of experiments indicate that a decrease in the values of fracture toughness attains as the number of constrained groove pressing (CGP) passes increase.

DERIVATION AND ACTOR OF CROSSED POLYMODULES

Bijan Davvaz,Murat Alp 한국수학교육학회 2018 純粹 및 應用數學 Vol.25 No.3

An old result of Whitehead says that the set of derivations of a group with values in a crossed G-module has a natural monoid structure. In this paper we introduce derivation of crossed polymodule and actor crossed polymodules by using Lue's and Norrie's constructions. We prove that the set of derivations of a crossed polygroup has a semihypergroup structure with identity. Then, we consider the polygroup of invertible and reversible elements of it and we obtain actor crossed polymodule.

A Note on Essential Soft Submodules

Bijan Davvaz,Jing Ma,Chengxiz Sun 한국지능시스템학회 2019 INTERNATIONAL JOURNAL of FUZZY LOGIC and INTELLIGE Vol.19 No.1

In this paper, we investigate the property of essential soft submodule and give an equivalent condition of essential soft submodule. Then the concept of the socle of a soft module is introduced, basic properties of such soft submodules are investigated, several equivalent definitions of the socle and the radical of a soft module are given respectively. Also, examples of these related soft submodules are given.

A Generalization of Cohen-Macaulay Modules by Torsion Theory

Bijan Zadeh, M . H .,Payrovi, SH . 호남수학회 1998 호남수학학술지 Vol.20 No.1

In this short note we study the torsion theories aver a commutative ring R and discuss a relative dimension related to such theories for R-modules. Let σ be a torsion functor and (T, F) be its corresponding partition of Spec(R). The concept of σ-Cohen Macaulay (abbr. σ-CM) module is defined and some of the main points concerning the usual Cohen-Macaulay modules are extended. In particular it is shown that if M is a non-zero σ-CM module over R and S is a multiplicatively closed subset of R such that, for all minimal element of T, S ∩ p = Φ, then S^(-1)M is a S^(-1)σ-CM module over S^(-1)R, where S^(-1)σ is the direct image of Q under the natural ring homomorphism R→S^(-1) R.

Co-Administration of Subeffective Anxiolytic Doses of Diazepam and Hydroxyzine in Elevated Zero-Maze in Mice

Bijan Naghibi,Farhoud Rayatnia 대한신경정신의학회 2011 PSYCHIATRY INVESTIGATION Vol.8 No.2

Objective Benzodiazepines are from the most common drugs which are used for treatment of anxiety disorders. There are other drugs with antianxiety properties including antihistamines such as hydroxyzine, too. Body of evidence show that co-administration of two drugs which act through different mechanisms, makes the dose of each drug to be reduced, while preserving the desired effect with less adverse drug reactions. The aim of this study was to see whether co-administration of subeffective antianxiety doses of diazepam and hydroxyzine has any antianxiety effect in elevated zero-maze (EZM) in mice. Methods To find the highest subeffective dose of each drug, different doses of hydroxyzine from 1.5 to 24 mg/kg and diazepam in doses of 0.25, 0.5 and 1 mg/kg were injected to male mice. Thirty minutes later, the animals were placed on EZM and various parameters of an-xiety were recorded by a camera to assess later. After determination of subeffective antianxiety dose of the drugs, co-administration of hydroxyzine and diazepam was done and the anxiety parameters were measured. Results In co-administration of 0.25 mg/kg of diazepam and 12 mg/kg hydroxyzine, as subeffective antianxiety doses of either drug, there were not any significant differences in main anxiety parameters, i.e., time spent in open areas and open area entries compared to control group. Hence, no anxiolytic effect was seen. Conclusion It seems that subeffective doses of diazepam and hydroxyzine may not have any facilitating or synergistic effect on each other in antianxiety responses in mice. Objective Benzodiazepines are from the most common drugs which are used for treatment of anxiety disorders. There are other drugs with antianxiety properties including antihistamines such as hydroxyzine, too. Body of evidence show that co-administration of two drugs which act through different mechanisms, makes the dose of each drug to be reduced, while preserving the desired effect with less adverse drug reactions. The aim of this study was to see whether co-administration of subeffective antianxiety doses of diazepam and hydroxyzine has any antianxiety effect in elevated zero-maze (EZM) in mice. Methods To find the highest subeffective dose of each drug, different doses of hydroxyzine from 1.5 to 24 mg/kg and diazepam in doses of 0.25, 0.5 and 1 mg/kg were injected to male mice. Thirty minutes later, the animals were placed on EZM and various parameters of an-xiety were recorded by a camera to assess later. After determination of subeffective antianxiety dose of the drugs, co-administration of hydroxyzine and diazepam was done and the anxiety parameters were measured. Results In co-administration of 0.25 mg/kg of diazepam and 12 mg/kg hydroxyzine, as subeffective antianxiety doses of either drug, there were not any significant differences in main anxiety parameters, i.e., time spent in open areas and open area entries compared to control group. Hence, no anxiolytic effect was seen. Conclusion It seems that subeffective doses of diazepam and hydroxyzine may not have any facilitating or synergistic effect on each other in antianxiety responses in mice.

Uniform Micellization: The Key to Enhanced Mechanical Strength and Swelling Efficiency of Chitosan Hydrogel

Bijan Nasri-Nasrabadi,Akif Kaynak,Cynthia Wong,Pejman Heidarian,Khashayar Badii,Abbas Z. Kouzani 한국섬유공학회 2019 Fibers and polymers Vol.20 No.1

The fabrication of hydrophilic porous hydrogel, with high mechanical strength and good uptake capacity is desirable for a broad range of applications such as drug delivery and liquid sensors. The usual methods are limited to the production of structures with high density of covalently crosslinked networks that restricts the polymer chain rearrangement, resulting in non-uniformed pore size distribution. Covalent networks also limit the activity of functional groups and influence the uptake properties of the polymer. In this study, we proposed simple cyclic cryogelation for the fabrication of hydrogels with uniform pore sizes via controlling the micellization and crystal formation. The chitosan based hydrogels ionically crosslinked with 8 % (w/v) of tripoli phosphate sodium (TPP) displayed high Young’s modulus (63 MPa) after cyclic freezethawing. The liquid uptake capacity of the samples treated with 8 % (w/v) TPP solution at pH 4 showed a slight decrease of about 29 % in comparison to that of non-cyclic processed samples (36 %).

DDC in DSpace

Bijan Kumar Roy,Subal Chandra Biswas,Parthasarathi Mukhopadhyay 건국대학교 지식콘텐츠연구소 2017 International Journal of Knowledge Content Develop Vol.7 No.4

The paper discusses the nature of Knowledge Organization Systems (KOSs) and shows how these can support digital library users. It demonstrates processes related to integration of KOS like the Dewey Decimal Classification, 22nd edition (DDC22) in DSpace software (http://www.dspace. org/) for organizing and retrieving (browsing and searching) scholarly objects. An attempt has been made to use the DDC22 available in Bengali language and highlights the required mechanisms for system-level integration. It may help a repository administrator to build an IDR (Institutional Digital Repository) integrated with SKOS-enabled multilingual subject access systems for supporting subject descriptors based indexing (DC.Subject metadata element), structured navigation (browsing) and efficient searching.

Quadratic residue codes over Z_9

Bijan Taeri 대한수학회 2009 대한수학회지 Vol.46 No.1

A subset of n tuples of elements of Z_9 is said to be a code over Z_9 if it is a Z_9-module. In this paper we consider an special family of cyclic codes over Z_9, namely quadratic residue codes. We define these codes in term of their idempotent generators and show that these codes also have many good properties which are analogous in many respects to properties of quadratic residue codes over finite fields. A subset of n tuples of elements of Z_9 is said to be a code over Z_9 if it is a Z_9-module. In this paper we consider an special family of cyclic codes over Z_9, namely quadratic residue codes. We define these codes in term of their idempotent generators and show that these codes also have many good properties which are analogous in many respects to properties of quadratic residue codes over finite fields.

Optimal design of Base Isolation System considering uncertain bounded system parameters

Bijan Kumar Roy,Subrata Chakraborty 국제구조공학회 2013 Structural Engineering and Mechanics, An Int'l Jou Vol.46 No.1

The optimum design of base isolation system considering model parameter uncertainty is usually performed by using the unconditional response of structure obtained by the total probability theory, as the performance index. Though, the probabilistic approach is powerful, it cannot be applied when the maximum possible ranges of variations are known and can be only modelled as uncertain but bounded type. In such cases, the interval analysis method is a viable alternative. The present study focuses on the bounded optimization of base isolation system to mitigate the seismic vibration effect of structures characterized by bounded type system parameters. With this intention in view, the conditional stochastic response quantities are obtained in random vibration framework using the state space formulation. Subsequently, with the aid of matrix perturbation theory using first order Taylor series expansion of dynamic response function and its interval extension, the vibration control problem is transformed to appropriate deterministic optimization problems correspond to a lower bound and upper bound optimum solutions. A lead rubber bearing isolating a multi-storeyed building frame is considered for numerical study to elucidate the proposed bounded optimization procedure and the optimum performance of the isolation system.