نتایج جستجو برای: zone safety factor

تعداد نتایج: 1195561  

ژورنال: سلامت کار ایران 2018

Background and aims: In spite of industrial safety’s developments in Iran, construction safety is not in desirable level and needs to be evaluated from different aspects. The aim of this study was to evaluate safety climate structure in construction projects and its effect on safety performance and accidents frequency rate. Methods: This study was conducted at 4 construction projects. ...

2012
Zhixia Li Heng Wei Hui Xiong Xuedong Yan

47 Advance detection and green extension schemes are widely applied in practice as a typical 48 solution to the safety issues associated with the intersection dilemma zone (DZ) problem. Most 49 existing detector configurations were either developed based on the traditional Type I DZ model 50 in which some critical contributing factors were assumed static, or based on generic Type II DZ. 51 A co...

Journal: :Sustainability 2021

Tunnel–bridge–tunnel groups (TBTGs) are emerging roads that often involve simple road alignments, but complex driving environments. Investigating crashes occurred in TBTGs is essential for revealing the environment–adaptability relationships such roads. This study seeks to analyze crash characteristics of component sections with different environments and compare impact differences key factor o...

Aziz Rezapour Farbod Ebadi Fard Azar Jalal Arabloo Yasser Mobasheri

Background and Objectives: Patient Safety Culture is increasingly recognized as an essential driver of patient safety. To establish patient safety culture, firstly the current status of the construct should be assessed. Valid assessment of patient safety culture is contingent on the availability of appropriate measurement tools. Hospital Survey on Patient Safety Culture (HSOPS) developed by th...

ژورنال: سلامت کار ایران 2016

Background and aims: The Organizational factors affecting safety performance while impact on the overall performance of their organizations, also have a causal relations with each other, so the intensity or weakness of a factor in the organization can be effective on the other factors that enhance or weakness of the factor. Accordingly, the aim of the current study is assess causal relations be...

Selecting a suitable pillar recovery method is one of the most important issues in the room and pillar mining. The main purpose of this study is to compare two methods for pillar recovery in Tabas central coal mine (TCM). Among the existing methods, the two methods, “Modified split and fender” and “Shortwall” are chosen for the numerical modeling. The three dimensional finite difference method ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده علوم 1392

سازند پابده در برش دره شهر شامل 260متر شیل، شیل آهکی، مارن و آهک می باشد. مطالعات انجام شده بر روی فرامینیفرهای پلانکتون منجر به شناسایی و ارائه تعداد 12 بیوزون شده است. این بیوزون ها عبارتند از: بیوزون شماره یک: parasubbotina pseudobulloides partial-range zone ، بیوزون شماره دو: subbotina triloculinoides partial-range zone، بیوزون شماره سه: morozovella angulata partial-range zone ، بیوزون شمار...

Journal: :J. Economic Theory 2003
M. Ali Khan Yeneng Sun

For a market with an atomless continuum of assets, we formulate the intuitive idea of a ‘‘well-diversified’’ portfolio, and present a notion of ‘‘exact arbitrage’’, strictly weaker than the more conventional notion of ‘‘asymptotic arbitrage’’, and necessary and sufficient for the validity of an APT pricing formula. Our formula involves ‘‘essential’’ risk, one based on a specific index portfolio...

2011
Maria T. Elenius Jan M. Nordbotten Henrik Kalisch

In geological storage of carbon dioxide (CO2), the buoyant CO2 plume eventually accumulates under the caprock. Due to interfacial tension between the CO2 phase and the water phase, a capillary transition zone develops in the plume. This zone contains supercritical CO2 as well as water with dissolved CO2. Under the plume, a diffusive boundary layer forms. We study how cross-flow between the capi...

In this article, an exact analysis of compressors spool in a turbojet engine has been investigated. The spool is modeled as a rotating thick-walled hollow circular cylinder with free-clamp ends. It is subjected to centrifugal load due to its constant rotational speed, uniform internal and external radial loads and arbitrary thermal gradients. The analysis is initially investigated for the homog...

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