استفاده از فناوری تلفن همراه در بهبود کیفیت آموزش دانشجویان پرستاری

با توجه به اینکه اکثریت دانشجویان از گوشی های هوشمند تلفن همراه و دیگر وسایل همراه، استفاده می کنند، پیشنهاد می شود نرم افزارهایی برای فعالیتهای آموزشی در زمینه پرستاری در ایران طراحی گردد و به روشی منسجم طبقه بندی و ارزیابی شده در اختیار دانشجویان پرستاری قرار گیرد. انجام تحقیقاتی در این زمینه به تعیین اثربخشی یادگیری از طریق موبایل و افزایش کیفیت آموزش با این روش کمک کننده خواهد بو

On the Remes Algorithm for Rational Approximations

This paper is concerned with the minimax approximation of a discrete data set by rational functions. The second algorithm of Remes is applied. A crucial stage of this algorithm is solving the nonlinear system of leveling equations. In this paper, we will give a new approach for this purpose. In this approach, no initial guesses are required. Illustrative numerical example is presented

بررسی میزان انواع خشونت خانگی و عوامل مرتبط با آن در مادران باردار منطقه کلاله

یافته‌ها: 312 نفر معادل 78 درصد از مادران باردار به اشکال مختلف مورد خشونت قرار گرفته بودند. شایع‌ترین نوع خشونت علیه مادران باردار، عاطفی بود و 78 نفر از زنان از خشونت جسمی و 53 نفر از خشونت جنسی شکایت داشتند. همچنین با افزایش تحصیلات خشونت علیه مادران کاهش پیدا کرد. بین خشونت خانگی و مصرف سیگار و عدم اشتغال همسر رابطه معناداری مشاهده شد Introduction: Violence against women is a universal phenomenon which has negative impact on the mental health of the family and society, and the consequences such as increased health care costs, reduced productivity and labor force of women are another results of this health and social cultural problem. So, this study was performed with aim to determine types of domestic violence and its related factors in pregnant women. Methods: This descriptive-analytic study was performed on 368 pregnant mothers in area of Kalaleh in 2014. Data were collected by simple sampling and using a questionnaire. Data was analyzed with SPSS software (version 19) and descriptive statistics and Fisher's exact test, Chi-square, independent t-test, and Pearson correlation test. Results: 312 pregnant women (84.78%) had been exposed to different types of violence. The most common type of violence against pregnant women was emotional with 181 cases (49.18%) and 78 (21.20%) complained of physical violence and 53 (14.40%) of sexual violence. Increased education reduced violence against women. There was a significant relationship between domestic violence, smoking and lack of husband's employment (P <0.05). Conclusion: According to high rate of domestic violence, it is recommended to screen violence in the all health and therapy centers. Also, life skills training and counseling culture among couples is important

Service-life extension of transport infrastructure through structural health monitoring

Transportation Infrastructure systems are recognized as essential for economic development, territorial cohesion, and social transformation. Unfortunately, some of the key structural components of this massive system, such as bridges, are rapidly ageing, while load conditions are exceeding those for which these systems initially envisaged as they are subjected to different hazards, such as natural events or new man-made phenomena. Given that a substantial portion of the current bridge stock was constructed many decades ago, degradation phenomena and a rise in service conditions greater than those employed in the original design may have contributed to reducing the reliability level, if countermeasures are not adopted. Therefore, the assessment of the current state and the prediction of the future condition of Transportation Infrastructure, and their protection against external hazards, turn out to be essential. This contribution firstly focused on an in-depth study of the role of structural health monitoring in improving the structural resilience of transportation infrastructure and consequently its life-cycle. Subsequently, a practical example is provided to highlight the role of SHM toward structural resilience improvement for an Italian common transport infrastructure

Service-life extension of transport infrastructure through structural control

Transportation Infrastructure Systems are recognized as essential for economic development, territorial cohesion, and social transformation. Due to the increasing age of bridges, and given that a large part of the existing stock was built several decades ago, some of their key structural components, such as bridges, are getting older while loading conditions are often exceeding those initially envisaged as they are subjected to harsher natural events and growing levels of traffic. The increasing age of bridges, the deterioration phenomena and the increase in service conditions, exceeding those used in the initial design, contribute to reduce their reliability level. This contribution firstly explores the role that structural control can play, then it proposes a suitable measure for the formalization of this role within the life-cycle assessment of bridges and overcrossing structures. The effects of structural control are evaluated for the case study of a cable-supported bridge subjected to fatigue deterioration due to wind action

Comparison of different algorithms to map hydrothermal alteration zones using ASTER remote sensing data for polymetallic Vein-Type ore exploration: Toroud-Chahshirin Magmatic Belt (TCMB), north Iran

© 2019 by the authors. Polymetallic vein-type ores are important sources of precious metal and a principal type of orebody for various base-metals. In this research, Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) remote sensing data were used for mapping hydrothermal alteration zones associated with epithermal polymetallic vein-type mineralization in the Toroud-Chahshirin Magmatic Belt (TCMB), North of Iran. The TCMB is the largest known goldfield and base metals province in the central-north of Iran. Propylitic, phyllic, argillic, and advanced argillic alteration and silicification zones are typically associated with Au-Cu, Ag, and/or Pb-Zn mineralization in the TCMB. Specialized image processing techniques, namely Selective Principal Component Analysis (SPCA), Band Ratio Matrix Transformation (BRMT), Spectral Angle Mapper (SAM) and Mixture Tuned Matched Filtering (MTMF) were implemented and compared to map hydrothermal alteration minerals at the pixel and sub-pixel levels. Subtle differences between altered and non-altered rocks and hydrothermal alteration mineral assemblages were detected and mapped in the study area. The SPCA and BRMT spectral transformation algorithms discriminated the propylitic, phyllic, argillic and advanced argillic alteration and silicification zones as well as lithological units. The SAM and MTMF spectral mapping algorithms detected spectrally dominated mineral groups such as muscovite/montmorillonite/illite, hematite/jarosite, and chlorite/epidote/calcite mineral assemblages, systematically. Comprehensive fieldwork and laboratory analysis, including X-ray diffraction (XRD), petrographic study, and spectroscopy were conducted in the study area for verifying the remote sensing outputs. Results indicate several high potential zones of epithermal polymetallic vein-type mineralization in the northeastern and southwestern parts of the study area, which can be considered for future systematic exploration programs. The approach used in this research has great implications for the exploration of epithermal polymetallic vein-type mineralization in other base metals provinces in Iran and semi-arid regions around the world

Numerical analysis of shipping water impacting a step structure

Shipping water, the flow washing over and impacting the upper decks of ships and offshore structures, occurs frequently during their service life and often causes structural problems. For engineers to design safe floating structures subjected to shipping water it is essential to gain an in-depth understanding of its depth and flow field, and the resulting impact forces. In this work, Computational Fluid Dynamics (CFD) is applied to understand the physics of shipping water washing over a stepped platform. We find that the most accurate solutions are obtained with the turbulence closure. The hydrodynamic load generated by the shipping water is found to strongly depends on the kinematic energy of the water hitting the step. It is shown that with smaller values of the freeboard a more dynamic flow ensues, with a stronger vortex and larger velocity gradient resulting in deeper shipping water and a larger impact force

Ionic liquid crystals : synthesis and characterization via NMR, DSC, POM, X-ray diffraction and ionic conductivity of asymmetric viologen bistriflimide salts

Acknowledgments This research is in part supported by the NSF EPSCoR RING-TRUE III grant no. 0447416, NSF-SBIR grant no. OII-0610753, NSF-STTR grant no. IIP-0740289 and NASA GRC contract no. NNX10CD25P (PKB). We thank Ronald C. G. Principe for making the Figures and Tables for this article. Acknowledgment is made to the donors of the American Chemical Society Petroleum Research Fund grant no. 59345-ND7 for partial support of this research by CMR and MRF. AMF would like to thank the Carnegie Trust for the Universities of Scotland, for the Research Incentive Grant RIG008586, the Royal Society and Specac Ltd., for the Research Grant RGS\R1\201397, and the Royal Society of Chemistry for the award of a mobility grant (M19-0000).Peer reviewedPostprin