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Some aspects of the biology of the female blue crab Callinectes amnicola(De Rocheburne)from the Cross River estuary,Nigeria

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Journal of Coastal Life Medicine 2015年第4期 259-264页

作者： eyo Victor Oscar Akpan Michael Mfon udoh Ifiok Solomon Fisheries and Aquaculture unit Institute of OceanographyUniversity of CalabarP.M.B.1115CalabarCross River StateNigeria Fisheries Department Ministry of Agriculture and Natural ResourcesP.M.B.1113UyoAkwa Ibom StateNigeria Zoology and environmental Biology Programme University of CalabarP.M.B.1115CalabarCross River StateNigeria

Objective:To investigate some important aspects of the biology of Callinectes amnicola(***)such as fecundity,carapace length-weight relationship,condition factor and carapace length frequency distribution from the Cross River estuary,***:A total of one hundred and twenty ovigerous females of ***,freshly caught with basket traps,lift net trap,and gill net were collected from the catches of the artisanal fisheries in the study area between June 2012 and May ***,carapace length-weight relationship,condition factor and carapace length frequency distribution were determined and analyzed following standard ***:Fecundity(F)ranged between 73090 eggs for crab of carapace length 8.1 cm and total weight 34 g and 809450 eggs for crab of carapace length 16.1 cm and total weight 395 g with a mean of 311808.93±17693.94 *** was a positive significant relationship between fecundity and carapace length,total weight and condition factor as follows:F=6839.7CL^(1.4403)(r^(2)=0.2145,Pear relationship between carapace length and weight of *** is given by the equation:Log W=2.0447LogL–0.1389(r^(2)=0.3357,Pe crab exhibited a negative allometric growth pattern(b=2.0447).Condition factor ranged between 21.48 to 104.95 with a mean value of 47.21±*** carapace length frequency distribution showed a unimodal class size ***:Findings of this study is crucial in assessing the population dynamics and development of management strategies of the the Blue crab,*** from the estuary such as mesh size regulation,fishing season and fishing ground regulation in the Cross River ***,findings of this study will be useful in evaluation of the aquaculture potential of the Blue crab ***,which is a valuable shell fish for the inhabitants estuary.

关键词： Callinectes amnicola Cross River estuary Fecundity Carapace length-weight parameters Condition factor Carapace length-frequency distribution

Biological and mechanical investigation of novel flax/silk protein-based nanofibrous scaffold for bone regeneration

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Progress in Natural Science:Materials International 2022年第4期32卷 443-455页

作者： M.Rama u.Vijayalakshmi Department of Chemistry School of Advanced Sciences Vellore Institute of Technology

The process of bone tissue regeneration involves an intricate network of a biological macromolecules that includes proteins and peptides to support stimulation and healing response. Here, we have fabricated a novel flaxseed/silk fibroin based(dual protein) composite nanofibers using β-TCP to improve the biological properties and promote cartilage tissue regeneration along with a controllable rate of biodegradation. The physiochemical properties of PVA/β-TCP/FP:SF were characterized by FTIR, XRD, SeM, porosity, contact angle measurements and mechanical evaluation etc. This study demonstrates the biological performance of the developed nanofibers by using hemocompatibility, biodegradation ability, and apatite deposition in stimulated body fluid. Moreover, the cell viability assay was performed on MG-63 osteoblast cells and long-term antibacterial rate against e. coli and S. aureus was analysed. Docking results of flax protein and silk fibroin protein further confirmed the stable modes of intramolecular bonding and the most stable electrostatic values using theoretical calculations. Taken together,the experimental results proved that the dual protein-based fibrous scaffold was found to be up-regulated in terms of biological activity with enhanced cell adhesion and proliferation.

关键词： Flax protein Silk fibroin β-TCP electrospinning Docking Bone regeneration

Adaptive backstepping control and synchronization of a modified and chaotic Van der Pol-Duffing oscillator

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控制理论与应用（英文版） 2011年第2期9卷 273-277页

作者： u.e.VINCeNT R.K.ODuNAIKe J.A.LAOYe A.A.GBINDINNINuOLA Department of Physics Olabisi Onabanjo University Institute of Theoretical Physics Technical University of Clausthal Department of Physics University of Ibadan

In this paper,we propose a backstepping approach for the synchronization and control of modified Van-der Pol Duffing oscillator *** method is such that one controller function that depends essentially on available circuit parameters that is sufficient to drive the two coupled circuits to a synchronized state as well achieve the global stabilization of the system to its regular *** simulations are given to demonstrate the effectiveness of the technique.

关键词： Chaos Synchronization Back-stepping Van der Pol-Duffing oscillator

Applications of Galilei Covariant electrodynamics to VacuumSubstratum Phenomena in Absolute Space and Time

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Journal of Systems engineering and electronics 1995年第4期6卷 59-85页

作者： H e. Wilhelm (AeD-Technologies, Thermopolis, WY 82443, u.S. A) AeD-Technologies Thermopolis WY 82443 U. S. A

The Galilei covariant generalizations of the eM field equations (1984) (including moving media), Schroedinger, and Dirac (1985, 1993) equations for inertial frames S(w) with substratum velocity w are re- viewed. By G-covariant electrodynamics, physical variables, e.g., rod length, clock rate, particle mass, momentum, and energy are G-invariants, determined by the object velocity v-w= vo=G-inv relative to the substratum frame, So(w=0) [v=object velocity relative to observer in S(w)] Galilean measurements using standard (i) contracted rods and (ii) retarded clocks, anisotropic light propagation, and conservation of eM energy and momentum in IFs S(w) are discussed. Fundamental experiments are formulated which permit measurement of substratum (w) induced eM and charge fields, the substratum velocity w, and verification of the G-invariance of the magnetic field, B= Bo=G-inv. The G-invariant Lagrangian and Hamiltonian of a charged particle in eM fields, and the momentum and energy conservation equations in Particle collisions are given for velocities |v-w|e eM Doppler effects for moving source or moving observer are shown to exhibit measurable substratum effects. The spectral lines from a recoiling atom exhibit superimposed Doppler and substratum (w) shifts. The measurable substratum effects in the (i) aberration of light and (ii) reflection of light from a moving mirror are evaluated. The eM fields of accelerated charges in the substratum flow w are given, and applied to the anisotropic emission of x-rays in IFs S(w). G-covariant electrodynamics is examined for subluminal and superluminal electron velocities. Both the Cerenkov effect in (i) dielectrics for Iv--wl> c(ro) and (ii) vacuum for |v-w| > co are relative to the substratum So, and demonstrate the anisotropy of the vacuum in IFs S(w). G-covariant electrodynamics (relative to substratum) contains Lorentz covariant electrodynamics (relative to observer) in the special case w = 0 (So).

关键词： Vacuum substratum Galilei covariance electrodynamics Quantum mechanics Substratum effects Substratum experiments Failure of special relativity.

Synthesis and Crystal Structure of Trans-bis(acesulfamato-O)tetraaquazinc(Ⅱ)

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Chinese Journal of Structural Chemistry 2010年第7期29卷 1047-1050页

作者： SAHIN Onur ICBuDAK Hasan B(u|¨)Y(u|¨)KG(u|¨)NG(O|¨)R Orhan Department of Physics Faculty of Arts and SciencesOndokuz Mayis UniversitySamsunTurkey Department of Chemistry Faculty of Arts and SciencesOndokuz Mayis UniversitySamsunTurkey

The title compound, trans-bis（acesulfamato-O）tetraaquazinc（Ⅱ）（I, C8H16N2O12S2Zn）, crystallizes in the triclinic system, space group P1 with a = 5.1638（5）, b = 8.5338（9）, c = 9.9583（9）A, α = 74.325（8）, β = 81.112（7）, γ = 75.800（8）°, V= 407.77（7） A3, Z = 1, F（000） = 236, Rint = 0.085, T= 296 K, the final R = 0.029 and wR = 0.078 for 1832 observed reflections with I〉 2σ（0. The ZnⅡcentre resides on a centre of symmetry and has a distorted octahedral geometry. The basal plane is defined by two carbonyl O atoms of two monodentate trans-oriented acesulfamato ligands and two trans-aqua ligands. The axial positions in the octahedron are occupied by two trans-aqua ligands. Intermolecular O-H…O hydrogen bonds produce R22（8） and R22（16） rings, which lead to two- dimensional polymeric chains.

关键词： crystal structure zinc(Ⅱ) octahedral complex hydrogen bonds

Optimized design of collector topology for offshore wind farm based on ant colony optimization with multiple travelling salesman problem

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Journal of Modern Power Systems and Clean energy 2018年第6期6卷 1181-1192页

作者： Ramu SRIKAKuLAPu Vinatha u Department of electrical and electronics engineering National Institute of Technology Karnataka

A layout of the offshore wind farm(OSWF)plays a vital role in its capital cost of installation. One of the major contributions in the installation cost is electrical collector system(eCS). eCS includes: submarine cables,number of wind turbines(WTs), offshore platforms etc. By considering the above mentioned problem having an optimized design of OSWF provides the better feasibility in terms of economic considerations. This paper explains the methodology for optimized designing of eCS. The proposed methodology is based on combined elitist ant colony optimization and multiple travelling salesman *** objective is to minimize the length of submarine cable connected between WTs and to minimize the wake loss in the wind farm in order to reduce the cost of cable and cable power loss. The methodology is applied on North Hoyle and Horns Rev OSWFs connected with 30 and 80 WTs respectively and the results are presented.

关键词： Ant colony optimization Offshore wind farm Multiple travelling salesman problem Wake effect Wake loss

Forced and Natural Vibrations of an Orthotropic Pre-Stressed Rectangular Plate with Neighboring Two Cylindrical Cavities

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Computers, Materials & Continua 2017年第1期53卷 1-22页

作者： u.Babuscu Yesil Department of Mathematical engineering Faculty of Chemical and Metallurgical Eng.Yildiz Technical UniversityDavutpasa Campus34210EsenlerIstanbulTurkey.

Forced and natural vibrations of a rectangular pre-stressed orthotropic compositeplate containing two neighboring cylindrical cavities whose cross sections are rectangularwith rounded-off corners are investigated numerically. It is assumed that all the end surfacesof the rectangular pre-stressed composite plate are simply supported and subjected to auniformly distributed normal time-harmonic force on the upper face plane. The consideredproblem is formulated within the Three-Dimensional Linearized Theory of elastic Waves inInitially Stressed Bodies (TDLTeWISB). The influence of mechanical and geometricalparameters as well as the initial stresses and the effect of cylindrical cavities on the dynamicalcharacteristics of the rectangular orthotropic composite plate are analyzed and discussed.

关键词： Initial stresses vibration cylindrical cavities 3D FeM orthotropic material.

A variable precision rough set approach to knowledge discovery in land cover classification

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International Journal of Digital earth 2016年第12期9卷 1206-1223页

作者： Iftikhar u.Sikder Department of Information System Cleveland State UniversityOHUSA Department of electrical engineering and Computer Science Cleveland State UniversityOHUSA

This paper presents a granular computing approach to spatial classification and prediction of land cover classes using rough set variable precision *** particular,it presents an approach to characterizing large spatially clustered data sets to discover knowledge in multi-source supervised *** evidential structure of spatial classification is founded on the notions of equivalence relations of rough set *** allows expressing spatial concepts in terms of approximation space wherein a decision class can be approximated through the partition of boundary *** paper also identifies how approximate reasoning can be introduced by using variable precision rough sets in the context of land cover *** rough set theory is applied to demonstrate an empirical application and the predictive performance is compared with popular baseline machine learning algorithms.A comparison shows that the predictive performance of the rough set rule induction is slightly higher than the decision tree and significantly outperforms the baseline models such as neural network,naïve Bayesian and support vector machine methods.

关键词： Rough set theory soft computing granular computing remote sensing approximate reasoning

Anti-inflammatory and analgesic activities of Melanthera scandens

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Asian Pacific Journal of Tropical Biomedicine 2012年第2期2卷 144-148页

作者： Jude e Okokon Anwanga e udoh Samuel G Frank Louis u Amazu Department of Pharmacology and Toxicology Faculty of PharmacyUniversity of Uyo Department of Science Technology Akwa Ibom State PolytechnicIkot Osurua Department of Pharmacology and Therapeutice.College of Medicine Evans Enwerem University

Objective:To evaluate the anti-inflammatory and analgesic activities of leaf extract of Melanthera scandens(***).Methods:The crude leaf extract(39-111 mg/kg)of *** was investigated for anti-inflammatory and analgesic activities using various experimental *** anti-inflammatory activity was investigated using carragenin,egg-albumin induced oedema models,while acetic acid,formalin-induced paw licking and thermal-induced pain models were used to evaluate the antinociceptive ***:The extract caused a significant(Pe-dependent reduction of inflammation and pains induced by different agents ***:The leaf extract possesses anti-inflammatory and analgesic effects which may be mediated through the phytochemical constituents of the plant.

关键词： Melanthera scandens Anti-inflammatory Analgesic