In the existing literature, the dynamic characteristics of the rotating shaft-disk systems are usually evaluated by using transfer matrix method (TMM) or finite element method (FEM). The results of the last methods are the approximate solutions and the exact solution concerned is rare. For last reason, this paper presents an analytical method to yield the exact whirling speeds and mode shapes of a spin “multi-span” continuous Timoshenko shaft mounted by arbitrary rigid disks. In theory, the whirling motion of a rotating shaft-disk system is three-dimensional (3-D), however, if the transverse displacement in the vertical principal xy-plane and that in the horizontal principal xz-plane for cross-section of the rotating shaft located at the axial coordinate are combined by using a complex number, while the diametric mass moment of inertia for unit length of the ith shaft segment, and that for each rigid disk , , are combined with their gyroscopic moments (GMs) to form the “frequency-dependent” equivalent mass moments of inertia, and , respectively, then the 3-D whirling motions of a rotating shaft-disk system will be similar to the two-dimensional (2-D) transverse free vibrations of a stationary beam. Therefore, the techniques for the 2-D free vibrations of a stationary beam carrying various concentrated elements (including intermediate rigid supports) will be available for the 3-D whirling motions of a rotating “multi-span” shaft mounted by arbitrary rigid disks. In order to confirm the reliability of the presented theory and the developed computer programs, most of the results obtained from presented method are compared with results obtained from available literature or FEM and good agreements are achieved.

One of the main problems of the cultivation of agricultural crops, including durum wheat (Triticum durum Desf.) in Azerbaijan is severe NaCl salinity and susceptibility of the regionalized varieties to salt. It is necessary to cultivate salt tolerant varieties in order to decrease a negative effect of this abiotic factor on the wheat yield. Developing the DNA markers of traits of economic importance allowed carrying out an express assessment of plants for resistance to the stress factors of the environment, and to identify varieties with high genetic potential of productivity. An assessment of the presence of the genome marker linked to the Nax1 gene, which regulates contents of sodium ions in leaves under salinity, has been performed in 19 domestic durum wheat varieties. Using gwm312 and wmc170 molecular markers 200bp allele linked to the Nax1 gene was detected in the Barakatli-95, Garabag, Sharg, Shiraslan-23 and Gyrmyzybugda varieties. Identified varieties may be promising for use in breeding.

In this work, two different adsorbent were comparatively used and developed preconcentration of ultra-trace levels of copper ions by flow injection analyses for atomic absorption spectrometry. Copper ions were preconcentrated on a mini-column packed with epichlorohydrin cross-linked silica gel-chitosan composite beads and epichlorohydrin cross linked multiwalled carbon nanotubes-chitosan composite beads. 0.1 M Ethylene diamine tetra acetic acid and 0.1 M nitric acid solutions were used in order to remove the copper ions from the adsorbents. The factors affecting preconcentration of copper (II) ions such as sample and eluent flow rate, loading time, pH, eluent concentration, interfering ions were investigated. Under the optimized parameters, detection limits of the methods were obtained as 2 ng mL−1 for epichlorohydrin cross linked silica gel-chitosan composite beads and 1.3 ng mL−1 for epichlorohydrin cross linked multiwalled carbon nanotubes-chitosan composite beads with enrichment factor of 23 and 19.2 respectively. In order to validate the developed methods, a certified reference material of EnviroMAT Drinking Water, Low (EP-L-2) was analyzed and the determined values were in good agreement with the certified values. The developed methods have also been applied to the determination of copper (II) ions in Gediz River (Manisa) with satisfactory results.

Nowadays, Speech Recognition is very important and popular. Speech recognition is the process of converting spoken words into text. This paper presents an approach to the recognition of speech signal using statistics method for the improvement of speech feature representation of voice recognition approach. This paper used connected words for recognition with different persons male and female in natural environment. The feature is extracted using median and mean values as feature vectors to speech recognize. Experimental results show that the proposed method gives good results.

This manuscript is devoted to the mathematical analysis of Hepatitis B model of fractional order\nderivative. The corresponding derivative is taken in Caputo-Fabrizio sense, which is a new approach\nfor such type of biological models. With the help of Sumudu transform, some new results are handled.\nFurther for the corresponding results, existence theory and uniqueness for the equilibrium solution\nare provided via using nonlinear functional analysis and fixed point theory due to Banach. Here,\nwe remark that the current derivative approach is better than the traditional Caputo derivative in\nwhich singular kernel has been used which often suffer from difficulties but in the present paper we\nhave applied the mentioned derivative without using the aforesaid kernel.

For animal body growth research as well as effective pest insect management, the characterization of growth pattern in organism is essential. A simple empirical mathematical technique is demonstrated here to understand the reproductive maturity age, mortality and whether the body growth is determinate or indeterminate, by incorporating a time dependent growth function G(t). This growth function for male and female grasshoppers Ceracris nigricornis laeta (Bol.) in Eastern Himalayan region (at Darjeeling, West Bengal, India) is estimated from time data of their body weight and length and consequently the nature of the growth is predicted. The theoretical approach introduced here is not only successfully tested on the grasshopper but also on male Moorish Tortoise (Testudo graeca graeca) and Rockfish (Sebastes mystinus) using the existing experimental data. Therefore this technique not only enriches the growth biology but also contributes in ecology and pest management.

a las Tecnologías de la Información y las Comunicaciones (TIC) y aquellas personas que no han tenido dicha oportunidad, al igual que la diferencia en el nivel de uso para diferentes actividades. Con el propósito de reducir esta brecha, se emprenden procesos en el marco del fenómeno denominado inclusión digital. Estos fenómenos, a pesar de ser resientes en el campo teórico, poseen diversos acercamientos, lo cual es una dificultad para los investigadores al momento de iniciar a construir el respectivo marco teórico o revisión conceptual. En el presente documento se realiza una clasificación de literatura de la perspectiva social de la brecha digital y la inclusión digital con base en un proceso de revisión sistemática de literatura.\nComo conclusión se puede mencionar que contar con una clasificación de material bibliográfico sobre los fenómenos, permite a los investigadores agilizar sus procesos e iniciar sus investigaciones con un mayor enfoque y con fuentes de primera mano.

Purpose: In this study, we investigated the effects of three agents frequently used in daily life for medical expulsive therapy on each other.\nMaterials and methods: A total of 143 patients meeting the criteria were included in the study. Patients were divided into three homogeneous drug groups which were tamsulosin group (n:48), alfuzosin group (n:47) and silodosin group (n:48). The time of stone expulsion, analgesic needs, side effects of the medicine and endoscopic intervention needs of the patients were recorded.\nResults: The rate of stone expulsion was 70.8% (n:34) in tamsulosin group, 70.2% (n:33) in alfuzosin group, and 75% (n:36) in silodosin group. No significant difference was observed among the rates of stone expulsion in three groups, and the rates of stone expulsion were similar (p=0.778). The duration of stone expulsion has significant differences in the groups (p=0.012). the time of stone expulsion in tamsulosin was 2.33±0.78 days longer than the one in Silodosin, indicating a significant difference. There was no significant difference between tamsulosin-alfuzosin and silodosin-alfuzosin (respectively p=0.147, p=0.925).\nConclusions: The results of this study showed that medical expulsive therapy by using alpha blocker agents are safe and efficacious. This option must be kept in mind who are not volunteer for surgery as the first-step treatment for eligible patients.

The article examines the main areas of cooperation between the Orthodox Church and medical institutions in Russia. It is shown that the Church, as well as medical and preventive institutions, are trying to determine the necessary and appropriate vectors for the development of medical care for people who need it. The article reveals historical parallels, indicating the readiness of doctors and representatives of the Orthodox Church to solve emerging problems and determine the prospects for development. The relationship between the spiritual and physical health of the Russian population is shown, which manifests itself in the context of socio-economic reforms.\nWe consider the historical experience of organization of church medical aid, which can help in the development of algorithms and conceptual principles for the creation of charitable communities, the formation of which will ensure the stable functioning of medical institutions, regardless of political situation and geographical location.\nThe author independently conducted an analytical review of domestic and foreign literature on this topic, compiled a research program, developed statistical accounting forms, collected medical, historical and statistical information. The planning, compilation of statistical processing programs and the processing itself were carried out in educational institutions and scientific centers.

Individuals at project level are becoming more responsible and accountable for the job they perform. Due to increase in complexity of project requirements, there is considerable influence on the responsibilities and roles of project professionals of software industry. The present study aims to examine the relationship and impact of structural and psychological empowerment on job performance of project professionals in software development industry. Data is collected from 219 employees working on projects in 60 software companies of Punjab that are registered with Pakistan Software Houses Association. The results of correlation and multiple regression analysis, reveal that both structural and psychological empowerment have significantly positive effect on the performance of project professionals. The findings suggest that both types of empowerment play major role in influencing employees’ job performance of software industry to enhance success in projects.