Computer protection of high voltage transmission lines

Imperial Users onl

CD73 a novel marker for the diagnosis of benign and malignant salivary gland tumors

Ecto-5?-nucleotidase (CD73) plays an important role in the development of several types of cancer; however, its prognostic significance in salivary gland tumors remains unknown. The current study was conducted to investigate the expression of CD73 in such tumors. In this retrospective study, immunohistochemical expression of CD73 was evaluated in 25 pleomorphic adenomas, 20 mucoepidermoid carcinomas and 20 adenoid cystic carcinomas using the Envision technique. Labeling indices of CD73 expression were calculated and compared between lesions. Immunohistochemical analysis demonstrated that the CD73 expression was significantly higher in salivary gland tumors than in normal salivary gland tissue (p0.05). The findings suggest that CD73 can be an independent and useful biomarker for predicting the clinical behavior of salivary gland tumors

The comparison of total antioxidant capacity of serum and saliva between patients with type-2 diabetes mellitus and control

Background and aim: In human body, there are a number of special systems to defend the damages caused by antioxidant. In some diseases the defense system against antioxidant activity alters and this alteration may be used in recognizing and the processing of different diseases. Diabetes is one of the most common and important chronic illnesses in which the antioxidant capacity is altered. The aim of this research was to determine and compare the antioxidant capacity of both serum and saliva of diabetics compare to the control group. Method: This is a cross - sectional research in which those under studying are 42 people of with typeII diabetes mellitus coming and going to the Arak diabetes center as the case group with 42 people of control group which were in the same age and sex with the people in the case group from the point of total antioxidant capacity in serum and saliva were compared. The capacity of antioxidant in serum and saliva was measured by FRAP method. Results: The average and standard deviation (mean±SD) of the total antioxidant capacity of serum and saliva in case group were in range: 2.51±0.088, 1.90±0.110 and in control group were: 2.90±0.107, 1.97±0.098 . (P=0.001, 0.74) From the statistical viewpoint, the increase in the total antioxidant capacity of serum in case group was meaningful, but the decrease in the total antioxidant capacity in saliva was not meaningful. Conclusion: Our results showed that the antioxidant capacity in the patients, s serum was higher than that in the control group. However, this difference was not observed in the saliva of these two groups. Conclusively, if this capacity of antioxidant is used in recognizing and processing of the disease, this difference should be taken into account

Factors affecting the choice of treatment center by infertile couples: A cross-sectional study in Yazd Reproductive Sciences Institute

Background: Infertility is one of the critical health issues in Iran. There are more than 70 specialized infertility treatment centers in Iran, of which the Yazd Reproductive Sciences Institute, is one of the most important ones. Objective: This study aimed to determine the factors influencing infertile couples’ choice of Yazd Reproductive Sciences Institute. Materials and Methods: This cross-sectional study was conducted on 275 infertile couples aged 18 and older, referring to Yazd Reproductive Sciences Institute, Yazd, Iran from September 2021 to March 2022. Data were gathered using a 2-part questionnaire. Data analysis was done through SPSS software. We used descriptive statistics, Kruskal- Wallis, Mann-Whitney, and t test for data analysis. Results: Most participants were individuals who came from other provinces of Iran (74.9%) and were referred to the Yazd Reproductive Sciences Institute. Among the 4 categories that influenced couples’ decision to choose this center, factors related to the personnel and treatment staff received the highest score (75.83), while personal factors received the lowest score (65.76). The average score for factors related to doctors was 72.90, and for factors related to the center, it was 73.65. The satisfaction with personnel and treatment staff varied based on participants’ education levels, with those who had lower levels of education reporting higher levels of satisfaction (p < 0.001). Conclusion: The primary factors contributing to the success of the Yazd Reproductive Sciences Institute in attracting clients were the dedication and expertise of the staff, as well as the esteemed reputation of the doctors at the center. Key words: Infertility, Fertility clinics, Yazd, Iran

Artificial neural network based classification of faults in centrifugal water pump

The detection and diagnosis of faults are of great practical significance for the safe operation of a plant. Early detection of fault can help avoid system shutdown, breakdown and even catastrophe involving human fatalities and material damage. This paper presents the design and development of ANN-based model for the fault detection of centrifugal water pump using a back-propagation learning algorithm and multi-layer perceptron neural network. The centrifugal pump conditions were considered to be healthy pump and faulty impeller and faulty seal and cavitation, which were four neurons of output layer with the aim of fault detection and identification. Features vector, which is one of the most significant parameters to design an appropriate neural network, was extracted from analysis of vibration signals in frequency domain by means of FFT method. The statistical features of vibration signals such as mean, standard deviation, variance, skewness and kurtosis were used as input to ANN. Different neural network structures are analyzed to determine the optimal neural network with regards to the number of hidden layers. The results indicate that the designed system is capable of classifying records with 100 % accuracy with one hidden layer of neurons in the neural network

The determination of saliva antioxidant capacity in 15-17 year old Students of Arak high schools

چکیده: زمینه و هدف: رادیکال های آزاد، اتم‌ها یا مولکول هایی هستند که به خاطر وجود الکترون تک بسیار واکنش‌پذیر می باشند. عدم تعادل بین تولید رادیکال های آزاد و سیستم دفاعی آنتی اکسیدانها باعث ایجاد استرس اکسیداتیو می‌شود که می‌تواند زمینه‌ساز بیش از یکصد نوع بیماری باشد. آلاینده های محیطی که سطح آنها در شهر اراک به دلیل صنعتی بودن بالاست، یکی از عوامل افزاینده تولید رادیکال های آزاد می باشند. لذا در راستای پیشگیری از ایجاد بیماری در شهر اراک این مطالعه با هدف تعیین ظرفیت آنتی اکسیدانی دانش آموزان 17-15 ساله این شهر انجام شد. روش بررسی: در یک مطالعه توصیفی- تحلیلی 720 نفر (395 دختر و 325 پسر) از دانش آموزان 17-15 ساله شهر اراک به روش نمونه‌گیری چند مرحله‌ای انتخاب شدند. در این مطالعه ظرفیت آنتی اکسیدانی تام بزاق با روش (Ferric Reducing Ability of Plasma=FRAP) اندازه‌گیری شد که این روش بر اساس توانایی بزاق در احیای یونهای فرو (Fe+3) به فریک (Fe+2) است. یافته‌ها: میانگین و انحراف معیار ظرفیت آنتی اکسیدانی تام بزاق m/mLμ 065/0±53/1 بود که این مقدار در پسرها 071/0±64/1 و در دخترها 059/0±42/1 میکرومول در میلی‌لیتر بود (001/0

Exploring the Human Factors Affecting Health Service Managers: A Qualitative Study

BACKGROUND: In recent decades, managing health-service systems has faced multiple challenges. Identifying and resolving these challenges promote the efficiency and effectiveness of hospital activities. AIM: The present study aimed to explore the human factors affecting health service managers.MATERIAL AND METHODS: In this qualitative study, in-depth unstructured interviews were conducted with 29 employees who were in close contact with the health service managers. All the interviews were transcribed verbatim. Data were collected using purposeful sampling and were analysed using conventional content analysis via MAXQDA software.RESULTS: A group of 29 participants were interviewed (male 65.5%, female 34.4%). "Managing managers" has been identified as the primary theme with four supporting secondary themes including the inappropriate appointment of managers, the impact of human and social needs of managers, influential employees, and disrupting organisational communications. These are the challenges faced by managers in managing human resources in health-service organisations.CONCLUSION: Results showed that employees manage their managers within the organisation so that they can prevent managers from concentrating on their management affairs and tasks resulting in the distortion of management practices. The results of this study can help the key policy makers and planners in health-service organisations to guide the organisation to pursue its goals through appointing appropriate managers and identifying influential employees

Antioxidant Activity of Iranian Echium amoenum Fisch & C.A. Mey Flower Decoction in Humans: A cross-sectional Before/After Clinical Trial

Medicinal plants are recognized as sources of natural antioxidants that can protect from biological system oxidative stress. The present cross-sectional before/after clinical trial was carried out to investigate the antioxidant properties of the decoction of the flowers of Echium amoenum Fisch & C.A. Mey in humans. A group of 38 healthy subjects was invited to use the E. amoenum (7 mg kg(−1)) twice daily for 14 days. Blood samples before and after entering the study were measured for lipid peroxidation level (LPO), total antioxidant capacity (TAC) and total thiol (SH) molecules. A significant reduction of blood LPO (24.65 ± 11.3 versus 19.05 ± 9.7, P = 0.029) was observed after 14 days of E. amoenum consumption. Blood TAC (1.46 ± 0.51 versus 1.70 ± 0.36, P = 0.018) and total thiol molecules (0.49 ± 0.11 versus 0.56 ± 0.12, P = 0.001) increased after 14 days of E. amoenum consumption. In conclusion, this antioxidative stress potential of E. amoenum may be due to its bioactive antioxidant components, especially rosmarinic acid and flavonoids. In recent years the importance of oxidative stress in the pathophysiology of many human disorders has been confirmed, thus use of this plant as a dietary supplement is highly recommended