توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Seismic Wave Monitoring and Ground Vibration Analysis Generated by Bench Blasting in Sungun Copper Mine
نویسنده(ها): ، ،
اطلاعات انتشار: سومین کنفرانس مکانیک سنگ ایران، سال
تعداد صفحات: ۸
Drilling and Blasting technique is still considered to be the most economical method for rock breaking either on surface or underground mining. During the blasting process only 20–30% of explosive energy is utilized for fragmenting the rockmass and the rest is wasted in the unwanted and damaging forms of environmental disturbances and so on. Among these, ground vibration is considered to have the most damaging effect, since it causes damages on surface and subsurface structures and instability in rock structures in near and far distances form the blasting area. So that to conduct a proper blasting it is necessary to investigate and control environmental issues of blasting especially the ground vibration produced from bench blasting. Therefore, recent research was carried out to determine the propagation law of blast induced vibrations in the form of peak particle velocity (PPV) and scaled distance attenuation relation in Sungun Copper Mine, located in East Azerbaijan, Iran. During this study the ground vibration components were measured for 65 blast events during long period by means of Instantel vibration monitors. Also blasting specifications and scaled distance (distance between the source and the station normalized with maximum charge quantity per delay) were recorded carefully for each event. At the end, a best
propagation law with a high correlation coefficient was established
site–specific
for Sungun Copper Mine.<\div>

۲Smart Etch or Plasma Hydrogenation–AssistedH igh Aspect Ratio Etching of Silicon
نویسنده(ها): ، ، ،
اطلاعات انتشار: پانزدهیمن کنفرانس مهندسی برق ایران، سال
تعداد صفحات: ۵
Achieving a novel plasma hydrogenation assisted vertical etching of silicon is reported. The process uses a sequential ydrogenation\oxygenation
and reactive ion etching to stimulate the vertical removal of the exposedS i substrotew ithout damaging the sidewalls. 3–D structures with aspect ratios of 30:I and features as small as 0.7um have been realized. Also high aspect ratio etching of PET plastics by means of directional ultra–violet illumination ,s reported. Fabrication of various structures suitable for sensor applications is reported.<\div>

۳Optimization of extruded preform dimensions for a T–shape hydroforming part based on response surface and finite element method
نویسنده(ها): ، ، ،
اطلاعات انتشار: شانزدهمین کنفرانس سالانه مهندسی مکانیک، سال
تعداد صفحات: ۷
Tube hydroforming has been widely applied to produce seamless joints in oil and gas industry. The finite element analysis is used as an effective tool for optimization of hydroforming process. In this paper, a T–shape tube hydroforming process is simulated using the finite element method. The simulation was verified by experiments performed on T–shape tube hydroforming. The internal pressure, material model and other important simulation parameters was obtained from experiments. By using design of experiment methodology number of experiments with different
thickness and length setting of initial tube were suggested. In order to avoid costly experiments, the finite element simulation was used. At last response surface methodology (RSM) were adopted to plot the results of the analysis. Since protrusion height, thickness reduction at protrusion region and thickness increase in central region of the product were important design parameters to control, the initial tube thickness and length was so optimized that the best possible product was achieved. Finally, a model using optimized initial tube was analyzed. The predicted amount of parameters was compared to those achieved from the analysis.The comparison showed a good agreement between the predicted and analyzed results.<\div>

۴Effect of initial tube size on T–shape hydroformed joint by design of experiment and finite element method
نویسنده(ها): ، ، ،
اطلاعات انتشار: شانزدهمین کنفرانس سالانه مهندسی مکانیک، سال
تعداد صفحات: ۸
Tube hydroforming is an innovative metal forming Process by which many near net shaped industrial parts can be manufactured. The finite element analysis is used as an effective tool for optimization of hydroforming processe. In this paper, a T–shape tube hydroforming
process is simulated using the finite element method. The simulation was verified by experiments performed on T–shape tube hydroforming. The comparison shows a good agreement between two results. The internal pressure, material model and other important simulation parameters was obtained from experiments. By using design of experiment methodology number of experiments with different thickness and length settings
of initial tube were suggested. In order to avoid costly experiments, the finite element simulation was used. Using the design of experiment analysis tools and analysis of variance (ANOVA) the effect of tube size on the protrusion height, branch top thickness reduction, thickness increase in central region of the part was investigated. The result suggests one of the combinations of thickness and length as the optimized
initial configuration to obtain the desired product.<\div>

۵CFD model for turbulent and laminar boundary layer momentum and heat transfer on a flat plate
نویسنده(ها): ، ،
اطلاعات انتشار: پنجمین کنگره بین المللی مهندسی شیمی، سال
تعداد صفحات: ۷
A CFD k–e model is presented for turbulent momentum and heat transfer on a flat plate. The layer is simulated for both compressible and incompressible flow. Momentum and heat boundary layer thickness, velocity and heat profile are compared for turbulent and laminar flow. The equations are solved by Finite Volume technique in a Cartesian frame using non–uniform grid in the vicinity of viscous sub–layer. Also a fine grid size was chosen to have less CPU time. In this research we showed that the boundary layer thickness and friction factor is grater in compressible flow. The results are in good agreement with other proposed empirical equations and also Prandtl & Blasius Theory.<\div>

۶Wave length effect on Kelvin –Helmholtz instability in oil–gas two phase stratified flow using CFD modeling
نویسنده(ها): ، ، ،
اطلاعات انتشار: پنجمین کنگره بین المللی مهندسی شیمی، سال
تعداد صفحات: ۱۲
In this article, transient condition of two–phase stratified gas–liquid flow was investigated using numerical simulation. The base of the method is including one–space dimensional transient solution of the governing equations using two–fluid model. In the present work, we use an analogy between the SIMPLE algorithm in two–space dimensional single phase flow and one–space dimensional two–phase stratified flow by applying special algorithm to solve the conservation equations. As modeling established and justified, wave growth was studied in two–phase stratified flow in a horizontal duct. The results obtained from this work were compared with the results of the previously published articles. The results show that the classical criterion for the Kelvin–Helmholtz (K–H) instability agrees when the long wavelength with small amplitude is considered. In this case, K–H instability criterion, wavelength effect on this instability and pressure variation on the two phases interface agreed well with the other researcher correlations. However, as wavelengths decreased, the results showed that the K–H instability criterion is over–predicted and is required to be modified.<\div>

۷English Through Fun
نویسنده(ها): ،
اطلاعات انتشار: زمستان- شماره ۸۹، سال
تعداد صفحات: ۸

۸Professors’ view on the appropriate postgraduate degree in nursing education: A comparative study in two different sociocultural societies and literature review
اطلاعات انتشار: International Journal of Medical Reviews، اول،شماره۱، Winter ۲۰۱۴، سال
تعداد صفحات: ۱۱
Generally, studying and taking license in doctorate of nursing should be according to the society's requirement for better applying of that doctorate degree. In this line, selecting appropriate doctorate program is one the most challenges for any nurses that fulfill the different professional need of nursing disciplinary in academic and clinical settings. The purposes of present study were comparison of the PhD and DNP programs aims and determining appropriate doctoral program from the American and Iranian professor's perspective according to the academic and clinical contexts. The design of study was a review and an internet–based cross–sectional research. Selected governmental Universities in all over the Iran and the United States (presenting DNP program) were settings of study. The participants of study were lectures with the academic position higher than instructor (Assistant professor = 32, Associate professor= 22, and Professor = 5). According to the first purpose, all of American's professors were compared and declared clearly but the majority of Iranian's professors weren't differentiated between the purposes and were explained their responses in the uncertainty halo. However, curriculum compatible with the interests and goals, increase in intellectual knowledge, career advancement, primary care clinical practice, and nursing education were described as the final purposes of PhD and DNP programs. About the second purpose, new PhD curriculum was developed according to the academic and clinical contexts with two sections: theoretical (24 credits) and clinical (22 credits) courses. The evolution of such new doctoral program in nursing especially in the developing countries, due to their limitations, deficiencies, and even lacks of resources, needs a multi and interdisciplinary partnership and cooperation to ameliorate bridges and reducing barriers; because of the majority of doctoral courses have dynamic nature and for that, need to modify and reconsider continuously. Furthermore, for better managing the new and sometimes challenging situations, such partnership and cooperation are so necessary.

۹What is an Appropriate Nursing Care Model in Critical Care Units: Domestic or International Models
اطلاعات انتشار: International Journal of Medical Reviews، اول،شماره۲، Spring ۲۰۱۴، سال
تعداد صفحات: ۱۰
Critically ill patients are characterized as those who survive the initial episode of critical illness but remain dependent on critical care therapies. Models of care delivery to guide care of critically ill patients are valuable resources to optimize care and promote the well–being of these patients in acute hospital settings. The purposes of this review article were 1. What are appropriate characteristics of an appropriate model for application in critical care unit (CCU)? 2. What are the effects of application nursing care models (NCMs) on the daily nursing practices? 3. What are the effects of application NCMs on the patients' outcomes? The University of York center for Reviewers and Dissemination Guidance approach was used for searching seven databases (Science direct, Ovid, Cochrane, Ebsco Host, Scopus, Pub med, and SID) with 10 key words from the 1983 to the June 2014. Lastly, 25 full texts analyzed for responding to the research questions. Additional responding to the three research questions, the core concepts of international NCMs were partnerships, evaluation the current models in CCU, better understanding of critically ill patients, and staff satisfaction from caring in CCU, however, domestic NCMs had more focused on the NCMs in CCU and in the majority ones, the staff satisfaction and selecting appropriate steps as a model were not assessed. Considering the appropriate features of domestic NCMs, it is recommended that these models carefully reviewed and adjusted to CCUs' needs.

۱۰Patient Education problems in Clinical and Educational Settings: A Review and Mixed methods Study
اطلاعات انتشار: International Journal of Medical Reviews، اول،شماره۳، Summer ۲۰۱۴، سال
تعداد صفحات: ۹
Introduction: To explore patient education problems in clinical and educational settings. Methods: A review and an explanatory sequential mixed methods design were used. In the quantitative phase, an extensive review of the literature was performed for improving the validation of the questionnaire and after that, 2300 nursing students by convenience sampling were recruited. Data were collected by a self–report bridges and barriers of patient education questionnaire. In the qualitative phase, 25 nursing students were recruited using purposeful sampling. Data were gathered using semistructured interviews and two focus groups.Results: In the quantitative phase, two items were recognized as first priorities (Need assessment of each patient in each ward and protocol creation based on; and Good communication between the nurse and patient). In the qualitative phase, onemain theme (Club of patient education problems) with two sub–themes (Educational and experimental problems; and communicational and managerial problems) emerged.Conclusion: It is essential for the managers in all levels of nursing to try to equalize and integrate the educational and clinical opportunities in two more important and inseparable environments of college and hospital. Practice Implications: It is possible that for the better education and implementation of the patient education courses for nursing students, particularly Iranian nursing students, the authorities of colleges and hospitals be able to use from the results of this research.

۱۱Respiratory Rehabilitation and Chronic Obstructive Pulmonary Disease: An Exploratory Review
اطلاعات انتشار: International Journal of Medical Reviews، دوم،شماره۲(پياپي ۶)، Spring ۲۰۱۵، سال
تعداد صفحات: ۱۲
Chronic obstructive pulmonary disease (COPD) is one of the few major causes of death whose prevalence is continuing to rise in the world. Pulmonary rehabilitation (PR), as a component of the treatment protocol, should be considered for all patients with chronic respiratory disease who have persistent symptoms. The purpose of the study was to investigate PR in patients with COPD, following six questions including comprehensive definition, nature's mechanism, commencing indication, advantages and disadvantages, comprehensive dimensions, and the cornerstone dimension of PR. The University of York Center for Reviewers and Dissemination Guidance approach was used for searching seven databases (Science Direct, Ovid, Cochrane, Ebsco Host, Scopus, Pub Med, and SID) with nineteen keywords and different combinations of aforesaid nineteen keywords from the year 1985 to the January 2015. Thirty full texts met the inclusion criteria and were analyzed for responding to the six research questions. The results showed that PR consists of exercise training, education, nutritional intervention, support in self–management behaviors, and psychosocial support. The extensive review of the literature indicated exercise training is the cornerstone of PR, but the study also corroborated that psychological aspect of the patients with COPD is the most important and the first dimension in PR. Furthermore, before the commencing any education, the patients with COPD in any stages, must have an effective and useful psychological support for ameliorating and improving the applicability of the PR.

۱۲Inter Professional Shared Clinical Decision Making Models in the ICU: Necessity to use
نویسنده(ها): ، ،
اطلاعات انتشار: International Journal of Medical Reviews، دوم،شماره۴(پياپي ۸)، Autumn ۲۰۱۵، سال
تعداد صفحات: ۲
The Intensive Care Unit (ICU) is a paramount essential part of each hospital, which the most critically ill patients are treated and taken care by the highest experienced physicians and nurses' with the most advanced equipment in an appropriate and adequate space (1, 2). Those with different scopes of practice work more or less independently, in ways that might not best serve the needs of patients and their families (3). In such situations, lake of harmony, coordination, and consensus among the clinicians is the major source of human error, which is the eighth leading cause of deaths in the ICU (4). The applying shared decision making models (SDMMs), is one of the saviors' approaches to harmonize and optimize the coordination and communication among the clinicians and can prevent the dreaded and catastrophic human errors. Shared decision making models have traditionally been understood to be the sharing of responsibility and control over medical decisions between patients, families, nurses, and physicians (5) and from many years ago, the models were introduced in the developed countries (6, 7).However, with many advantages and very minor disadvantages of SDMMs, the models remain in its infancy and significantly lag behind the progress made by developed countries in order to demonstrate the need for innovation. Furthermore, it should be stated why the models didn't get run in the developing countries and also, what the barriers and bridges of the commencing era of the SDMMs in the countries are.
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