نتایج جستجو برای: over the recent years
تعداد نتایج: 16193066 فیلتر نتایج به سال:
Introduction: Nowadays, millions of people are exposed to the dusts in their workplaces. Occupational exposure to dusts is considered as one of the most common and serious occupational hazards to workers’ health. The purpose of this literature review was to review the literature related to the occupational exposure to dusts in Iran published over the past 14 years. Material and Methods: In t...
cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...
Abstract The impacts of climate change and human activities on vegetation dynamics have attracted wide attention, especially in sensitive vulnerable areas such as the Qingzang Plateau China. In this region, a series ecological restoration projects been launched while effectiveness these requires evaluation further improvements. Remote sensing with high temporal resolution spatial coverage is an...
The utilization of VoIP (Voice over IP) in UMTS networks requires the establishment of adequated rules in order to maximize the efficiency of transmission over the air interface. Here we will describe a technique, based on the reduction of voice packet overhead, with the objective of minimizing the power expended during a typical conversation.
Existing microstructure literature cannot explain the empirical evidence that bid-ask spreads can decrease with information asymmetry and ignores either information asymmetry or inventory risks. We develop a market making model that highlights the asset pricing impact of market makers’ capability of making offsetting trades in markets where both information asymmetry and inventory risk are sign...
In this paper, a multicast scheme for UMTS which only requires insignificant modifications in the current UMTS network infrastructure is analyzed. We analytically present the multicast routing mechanism behind our scheme as well as the multicast group management functionality of it. Furthermore, we present an evaluation of our scheme in terms of its performance. The critical parameters for the ...
(1) a. Velar Palatalisation (velars change into postalveolars) : kU c] ruka ‘hand ( ) ’ – ruc) is) c) a ( ), ruc) en’ka ( ) b. Affricate Palatalisation (affricates become postalveolar) : tsU c] konets ‘end’ – konc) it’ ‘ to finish’ otets ‘father’ – otc) estvo ‘patronymic’ c. Iotation (many disparate changes of consonants) : tU c] s) ut ‘ joker’ – s) uc) u ‘...
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