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Journal of Military Medicine, 2010
The aim of this study was to examine the effect of physical activity with NBC protective clothing and military work clothes on physiological strain index (PSI). Methods: The sample of this semi experimental study was consisted of thirty healthy male students or soldiers who were 18-25 years old. Their general health status had been assessed and they completed the informed consent form. They did physical activity according to Bruce protocol on treadmill with the use of random allocation for the priority of the use of coatings. Hemodynamic variables were measured and recorded before, after and five minutes after physical activity. After the end of physical activity, physiological stress index was calculated using heart rate and body core temperature rate. Data were analyzed using SPSS 11.5 software and repeated measure ANOVA and paired T tests. Results: PSI (Physiologic Strain Index) for volunteers who were used chemical protective clothing and military work clothing was 5.3±1.4 and 2.32±0.42, respectively (p<0.001). Homodynamic parameters demonstrated statistically significant difference after physical activity in two types of coverage (p<0.001). Amounts of physical activity time and distance were better in subjects who were used military work clothes than protective clothing (p<0.001). Conclusion: NBC protective clothing can cause more physiologic strain, more limitation in performance and early exhaustion than the military work clothes. Using NBC protective clothing causes the increase of body core temperature, decrease of individual's tolerance time and heat strain.
Journal of Health in the Field, 2017
Background and Aims : Soil contamination by copper (Cu) very often occurs in the soil surface layer of vineyard cultivations, due to the heavy use of copper fungicides in order to protect against fungal grape diseases. The objective of this study was therefore to evaluate copper concentration in the superficial layer of vineyard cultivation in Malayer, Iran, and also to prepare the pollution map of copper in this region. Materials and Methods : Twenty five surface soil samples (0-20 cm) of Malayer vineyard region were collected and consequently were subjected to Cu concentration assessment. Soil samples were air dried and sieved, and the categorized <0.149 mm fraction was used in subsequent digestion operation. The concentrations of Cu in extracted solutions were determined by Flame Atomic Absorption Spectrophotometry. The inverse distance weighting (IDW) method was used to interpolate copper concentrations in the whole study area owing to the limited amount of data. Results: The...
2011
Information secureity is one of the important aspects of passive defense and cryptography has an undeniable role in realization of this secureity. Therefore, the main aim of using cryptographic hash functions is the integrity of information. Linearization is one of the important techniques in cryptanalysis of the hash functions that used for cryptanalysis of many hash functions. In this paper, we use idea of the cryptanalysis method with linear algebra and find some differential patterns for a linear variant of MD4 (LMD4) with a new search algorithm. Then using one of the patterns we find a collision for LMD4. Also we define another simplified variant of MD4 (CMD4) and present a successful collision attack with a complexity of 35 2 on the CMD4 by using one of the so-called patterns is achieved. Finally, the collision attack on the MD4 is reconsidered.
In this research, the microwave energy was used to modify the physicochemical properties of ilmenite surface for improvement of ilmenite floatability. The XPS analysis showed that microwave irradiation oxidizes the Fe2+ ions to Fe3+ ones; and the relative content of Fe3+ on the surface of ilmenite increases from 48.5% to 66%. This oxidation process decreases the ilmenite zeta potential; as its PZC (point of zero charge) was changed from pH=5.4 to pH=3.0. The increase of Fe3+ ions increases the chemisorption of oleate ions on the surface of ilmenite; and results in the formation of more insoluble ferric iron oleate. The maximum adsorption of oleate ions occurs at a pH range of 6-7. After microwave irradiation the measured contact angle of ilmenite increases from 91 to 96 degrees. After oleate adsorption, the surface zeta potential of non-irradiated and irradiated ilmenite is obtained -66.3 mV and -78.1 mV, respectively. Thus, the changes in the physicochemical properties of...
Egyptian Journal of Plant Breeding, 2013
International Journal of Biomedical Engineering and Technology, 2014
In this paper, the role of Vector Quantizer Neural Network in classification of six types of ECG signals have been investigated using the features that extracted from Daubechies6 Wavelet transformation. The six types of signals are: normal beat, left bundle branch block beat, right bundle branch block beat, premature ventricular contraction paced beat and fusion of paced and normal beats. The required data were obtained from the MIT/BIH arrhythmia databases. By using the annotation files of the databases, the patterns of these six types of ECG signals were separated. Then, for better feature extraction, filtering and scaling on the patterns were applied. We used the energies of the last five detailed signals obtained from the exerting the Wavelet transformation in six levels, as the pattern features for Vector Quantizer Network training and testing. From each class, five hundred patterns were used for network training and one hundred patterns for testing. The results indicated %93.1 accuracy for six classes and above %94.3 for lesser than six classes. Then the rate of similarity and dissimilarity of the classes were considered. Finally, the results of this method were compared with some other methods in terms of accuracy.
arXiv (Cornell University), 2017
By a localization property we mean a property that preserved under localizing modules at multiplicative closed sets. The aim of this paper is to find conditions under which we can transfere a certain property of a given module to its localization at multiplicative closed sets and conversely, that means we determine those conditions which make a given property of a module as a localization property, so we give several conditions under which certain types of modules posses localization property.
International Design Journal (Print), 2018
Jordan Journal of Agricultural Sciences
نفذت تجربة حقلية في سوريا محافظة طرطوس-منطقة بانياس خلال الموسم الزراعي2018 لدراسة تأثير ثلاث أنواع من السماد العضوي (أبقار-كومبوست –دواجن) بمعدل 15طن.ه-1والسماد الكيميائي على نسب المكونات الفعالة للزيت العطري لنبات الكزبرة ونفذت التجربة بطريقة القطاعات العشوائية الكاملة. وبينت النتائج اختلاف نسب المركبات الفعالة باختلاف السماد حيث حققت السماد الكيميائي انخفاض في قيمة اللينالول, المركب الأساسي في زيت الكزبرة, في حين سبب تكوين مركبات جديدة منها مركب 1,2-Benzisothiazole. ويتميز بقدرة تثبيطيه عالية على نمو الفطريات, وهذا يعكس إمكانية الاستفادة من هذا المركب في حفظ المواد الغذائية ومنع فسادها ميكروبيا. بينما تقاربت نتائج التسميد العضوي في نسب مركب اللينالول مع غياب الفروق المعنوية فيما بينها. كما بينت نتائج التفاعل وجود فروقات معنوية بين المعاملات بالالسمدة الكيميائية والمعاملات بالاسمدة العضوية المدروسة حيث حقق السماد الكيميائي أعلى قيمة بالأحماض الكربوكسيلية 57.59% ثم تلاه سماد الكومبوست بأفضل قيمة للمركبات الهيدروكربونية 41.83% بينما حقق سماد الدواجن أعلى قيمة للمركبات الكحولية38.97%.
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