Archives-  

The formalized theory of the identification of genotypes by their phenotypes in modern breeding technologies is offer. It erect on the mathematical model of the interaction "genotype-environment".

The paper explores the herding relationship between spot market and futures market by using two different herding measurements. Heavily traded constituents stocks of Taiwan electronic sector index and finance sector index are used to test the existence of herding. We also examine whether herding behavior has asymmetric reactions for up (bull) markets and down (bear) markets. Daily and 15-minute returns data covering Taiwan spot market and Taiwan futures market are analyzed. The results partly support the information cascade theory and rational asset pricing theory. Investors do herd temporarily but also trade rationally in a long period. Furthermore, daily and 15-minute data demonstrate the investors’ tendency toward herding is higher during market downstream.

In Wireless Sensor Networks, cluster head is the key technology where nodes or motes the information transmit it to the base station. The energy consumption in a wireless sensor network can be reduced by allowing only some nodes to communicate with the base station. One way to support efficient communication between sensors is to organize the network into multiple groups, called clusters, with each cluster electing one node as the head of cluster. To support scalability, nodes are often grouped mostly non-overlapping clusters. This paper proposes a new design of an efficient clustering in wireless sensor head which is based on two level clustering. In two levels clustering approach instead of sensor nodes sends the data to cluster heads directly, each node sends data to their cluster head and then sends data to the base station.

Retrocaval ureter is a rare disease found most often in young adult males, the usual clinical manifestation is right lumbar pain due to obstruction of the upper urinary tract. The diagnosis is based on CT and the treatment is mainly laparoscopic as our observation shows.

In this work, FT-IR and FT-Raman spectra are recorded on the solid phase of methyl 2-chloronicotinate in the regions 4000–400 cm-1 and 3500–100 cm-1 respectively. The geometrical parameters, vibrational assignments, HOMO–LUMO energies and NBO calculations are obtained for the monomer and dimer of methyl 2-chloronicotinate from DFT (B3LYP) with 6-311++G (d, p) basis set calculations. Second order perturbation energies and electron density (ED) transfer from filled lone pairs of Lewis base to unfilled Lewis acid sites of methyl 2-chloronicotinate are discussed on the basis of NBO analysis. give the evidence for the formation of dimer entities in the title molecule. The theoretically calculated harmonic frequencies are scaled by common scale factor. The observed and the calculated frequencies are found to be in good agreement. The thermodynamic functions were obtained for the range of temperature 100–1000 K. The polarizability, first hyperpolarizability, anisotropy polarizability invariant has been computed using quantum chemical calculations. The chemical parameters were calculated from the HOMO and LUMO values. The NMR chemical shielding anisotropy (CSA) parameters were also computed for the title molecule.

Improving distribution systems performance has become a significant issue as a result of large increase in electrical power consumption during recent years. The system operators aim to enhance efficiency of the distribution system in both dynamic and static modes. While DFACTS has commonly been employed to promote distribution systems capability in dynamic mode, this paper proposes a new static technique based on using interline dynamic voltage restorer (IDVR) to make a virtual smooth load duration curve for the adjacent loads having different load curves. Such a technique can be used for peak shaving and help the operator postpones the system expansion necessity. Furthermore, as a result of virtual smoothing load duration curve, voltage security margin and system reliability which are two important topics in static performance of the distribution systems will be enhanced. The simulation results demonstrate the suitability of the proposed technique.

In this analysis, the viscous dissipation and heat source effects on free convective boundary layer slip flow due to induced magnetic field is studied. The governing partial differential equations are converted into ordinary differential equations by using the similarity transformations. In which the coupled non linear differential equations are solved by using regular perturbation technique. The effects of various parameters on the velocity, temperature, induced magnetic field and also the local skin friction, the rate of heat transfer are presented through graphically and tabulated values in detailed.

This paper describes the method for solving vibration problem of ring shaped electro–magneto -elastic plate of polygonal (Triangle, Square, Pentagon and Hexagon) cross-sections using Fourier Expansion Collocation Method. A mathematical model is developed to study the wave propagation in a electro-magneto-elastic plate of polygonal cross-sections using the theory of elasticity. The frequency equations are obtained from the arbitrary cross sectional boundary conditions, since the boundary is irregular in shape; it is difficult to satisfy the boundary conditions along the inner and outer surface of the plate directly. Hence, the Fourier Expansion Collocation Method is applied along the boundary to satisfy the boundary conditions. The roots of the frequency equations are obtained by using the secant method, applicable for complex roots. The computed non-dimensional frequencies are plotted in the form of dispersion curves and its characteristics are discussed. The problem may be extended to any kinds of cross-sections by using the proper geometrical relations.

Relationship between microfinance and economic growth has been a major concern for the policymakers of developing countries and focal point of economists to eradicate poverty, empower poor people and produce employment opportunities. This research applies OLS method to trace the impact of microfinance on economic growth in Pakistan.Variables of the study are active borrowers, active savers, active insured persons, borrowing, saving and insurance amount from microfinance institutions. Active borrowers and borrowing amount have highly significant positive relationship with economic growth of Pakistan. Active savers and saving amount have highly significant negative relationship with economic growth whereas insurance policyholders and insurance amount have no relationship. Government should not only increase outreach of microfinance but also devises a mechanism, which cannot only channelize the funds efficientlybut also avoid non-performing loans. Government should also provide some tax rebate or concession to microfinance and microcredit agencies so that maximum amount can be channelized towards economyin order to get long-run results.

Modern semiconductor switching devices are being utilized more and more in a wide range of applications These power electronics devices offer economical and reliable solutions to better manage and control the use of electric energy. However, the characteristics of most power electronics circuits, those semiconductor devices present nonlinear operational characteristics, which introduce contamination to voltage and current waveforms at the point of common coupling (PCC) of industrial loads. These devices, aggregated in thousands, have become the main polluters, the main distorters, of the modern power systems. At the Same time rapid development of semiconductor devices in power and control circuits, a new generation of equipments that help maintaining a good level of power quality, namely active power filters, has been developed. Theirs advantages over conventional means are more flexibility and very fast control response. The paper aim is to present the actual Power Quality Problems and solutions by active filters based on state-of-the-art power electronics technology and also their future prospects and directions.