OC servomotors as appl ied t o robots and machine too l s can be app l ied e i t h e r as torque con t ro l devices o r speed cont ro l devices. For torque con t ro l the cur ren t t o the motor i s the i npu t var iab le , and f o r speed con t ro l the vol tage i s the i npu t var iab le . The se lec t i on o f the appropr iate type o f con t ro l va r iab le i s based upon the opera t ing sy...

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Reproductive parameters evaluation is considered as helpful tool for gene bank formation in ecological and economically important animals species. Gloydius halys caucasicus is venomous, viviparous pit viper of northwest of Iran. In this research, the spermatic reproductive parameters of this taxon were studied. Twenty six male snakes were collected from Takht-e-Soleiman region between September...

1. We estimate colony reproductive success, in numbers of offspring colonies arising from a colony's daughter queens, of colonies of the red harvester ant, Pogonomyrmex barbatus. 2. A measure of lifetime reproductive success is essential to understand the relation of ecological factors, phenotype and fitness in a natural population. This was possible for the first time in a natural population o...

salinity is one of the most restrictions in plant growth in dry and semi dry land which effects production of many crops such as sesame. in order to study the phenology and morphology characteristics of 43 ecotypes and line of sesame (sesamum indicum l.) under salinity of irrigation water (5.2 ds.m-1) a field experiment was conducted at research farm of center of excellence for special crops, f...

The presence of uninterpreted symbols in the logic means that we must distinguish between a state machine M and its abstract description D in the logic. A given abstract description D will determine a machine M for every interpretation ¢. For the purpose of hardware verification we are interested only in finite state machines (FSMs). However, an abstract description will represent infinite as w...

Introduction: Reverse osmosis (RO) is best known for its use in desalination (removing the salt from seawater to get fresh water), but since the early 1970s it has also been used to purify fresh water for medical, industrial, and domestic applications. The aim of this research was the performance study of reverse osmosis plants for water desalination in Bandar-Lengeh, Iran. Materials and Meth...

Sixty Ghezel ewes (age 3.5 years) were used to study the effect of different nitrogenous supplements in flushing ration on reproductive performance. Experimental treatments were divided in five groups: group A: urea; group B: soybean meal (SBM); group C: corn gluten meal (CGM); group D: barley grain and group E: control or basal diet (no flushing). The four flushing rations had nearly the same ...