hadi hosseini

The combination of aptamer is performed with molecularly imprinted (MIP) using their unique features. In this sense, first the screen-printed carbon electrode (SPCE) was modified with nano size iridium cupper on nitrogen-doped carbon nanocapsoul (CN@IrCu) and, then, the Aptamer -MIP hybrid was used to detect Helicobacter pylori. This design leads to the use of dual properties of Aptamer and MIP. Moreover, CN@IrCu has been used as a substrate to increase aptamer loading and the conductivity. The sensing surface fabrication steps was measured by several different electrochemical techniques such as cyclic voltammetric (CV), differential pulse voltammetric (DPV), electrochemical impedance spectroscopy (EIS). The sensor shows a linear range from 102 CFU.ml-1 to 107 CFU.ml-1 with a detection limit of 33 CFU.ml-1. This Aptamer-MIP/CN@IrCu/SPCE was successfully evaluated in determining the concentration of Helicobacter pylori in blood serum samples with high reproducibility and selectivity. This MIP-aptasensor is low cost, low response time, high stability and good sensitivity.

Astronomers have made predictions based on the study of astrological signs as well as movement of planets and stars and their influence on Earth, and have argued it according to astronomy. This science was initially the exclusive domain of astronomers, but gradually expanded to the field of medicine and treating the patients. The subjects related to the well-known astrological signs (Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius, and Pisces) in the zodiac and planets (Saturn, Jupiter, Mars, Sun, Venus, Mercury, and Moon) in the solar system have a special effect according to Persian Medicine. The most important applications included recognizing the suitable moment for medical affairs, including determining the time of symptom onset in patients, composing drugs, prescribing pharmaceutical drugs, medicine consumption at the suitable moment, and finally restoring patient health. Astrological concepts that are more prominent in handwritten texts of three great Iranian sages, Abu Rayhan Biruni, Sayyid Isma‘il Jurjani, and Aqili Shirazi, are those related to predicting auspicious (sa'd) and infelicitous (nahs) moments for medical affairs.

Some excavations need to be designed for a long time or sometimes they are left for a long time. Stabilization of most of the excavations has been done using anchors. Field surveys of these excavations show that in some cases, deformation of the excavations increases over time, and the locking force of anchors decreases, leading to dangers. Therefore, it is very important to know the long-term behavior of stabilization systems by an anchor and reduce the anchor load. The main purpose of this study is to evaluate the changes in anchor load in excavations. Numerical modeling of the long-term behavior of soils has many complexities and may not correspond to reality. Therefore, in this study, data on the long-term behavior of an excavation project in Tehran were collected and then numerical modeling in finite difference software was used to study the long-term behavior of this system. Also, using the back analysis method, the input creep variables of the rheological model of the time function in the numerical model were determined and used. Comparison of the results of this research and field survey results confirms the time function behavior of the numerical model performed in software. The results of this research show that in an anchor installed in the middle depth of the excavation project, a 7% reduction in load occurs one year after prestressing. Also, during the creep time, the maximum horizontal deformation of the excavation walls increases by 13% during one year.

One of the most critical concerns of planners is coordination and compatibility between the educational system's outputs and the labor market's needs. Higher education's quantitative and qualitative development should follow the predetermined goals to benefit as much as possible from graduates' abilities. Educational planning should provide the specialized needs of the labor market as well as prevent unemployment and waste of graduate abilities. Compatibility between job needs and quantitative and qualitative development of higher education plays a key role in getting stable jobs by agricultural graduates.Therefore, universities and agricultural higher education centers should implement educational programs in accordance with the changes, transformations, and challenges in the agricultural sector. In this article, the estimation of educated manpower needed in the fields of mechanization and agricultural machinery with a qualitative and narrative type of view and with an analytical method was discussed. This research is applied in terms of scope and descriptive study regarding the execution method. The estimation of the required manpower in the mentioned disciplines using the ratio density model by developing a focus group consisting of 10 agricultural education experts. The focus group included participants with common traits/experiences from the universities of Tehran, Azad Islamic Tehran Science and Research Unit, Agricultural Mechanization Development Center, Agricultural Engineering Technical Research Institute, Agricultural Engineering and Natural Resources Organization, and Agricultural and Industrial Machinery Union.

In many construction projects, it is necessary to excavate the land so that its walls are vertical or close to vertical. Lateral pressure is exerted on these walls due to the movement of the soil behind it. In order to prevent the collapse of the walls of the excavated site and its possible consequences, temporary or permanent structures are implemented, which is called stabilization. Excavations are secured for various reasons. They may be stabilized to protect personnel entering and working in the excavation or to protect buildings or municipal services adjacent to excavation. Over the past years, there have been a large number of excavations in large cities, including Tehran, which were abandoned due to some problems. Furthermore, while some excavations need to be designed for a long time, long-term design basics are not observed during such processes. Stabilization of most of these excavations has been done using anchors. In this method, after placing and implementing the anchors, they are prestressed by applying force. Observations and long-term surveys of these excavations show that in some cases, locking force of anchors decreases, leading to dangers. Therefore, it is very important to know the long-term behavior of anchors in excavations to investigate the stability of these excavations that are prolonged or abandoned for a long time. In this study, field data of the long-term behavior of a excavation in Tehran is used and numerical modeling is done based on this case study. Verification and calibration of the numerical model has been done based on field measurements. Also in this article, relationships based on the results of the numerical model have been proposed to predict the anchor load in the long term in cohesive coarse-grained soil. The proposed relationships predict well the anchors load at one year after the end of excavation. These relationships are separated to three categories of five strands anchors, six strands anchors and six strands anchors with short length. In the following, the variables affecting the long-term behavior of the anchor loads embedded in the excavation have been studied. These variables include soil properties, depth of the excavation and neighbor surcharge of the excavation. The results of this article, in addition to presenting the relationship for anchor load prediction, include the introduction of variables that affecting long-term behavior. The parametric study shows that with the increase of the angle of internal friction or the increase of soil cohesion, the amount of anchors load decreases over the time. Also, by increasing the depth of the excavation or increasing the neighbor surcharge of the excavation, the load of the anchors decreases less over time. Of course, the impact of excavation depth occurs mostly in the lower anchors and does not affect the anchors of the first row and close to the ground. Studies showed that anchors close to the earth surface have a greater rate of load reduction over time among anchors with the same length and number of strands. Also, among the same anchors, anchors with shorter length experience more load reduction over time.

Sesame oil which is one of the most popular and expensive edible oils, is prone to adulteration. High price of Sesame oil has motivated adulterers to mix the high-quality Sesame oil with low-quality, less expensive vegetable oils. In this study, the fatty-acid profiles of sesame, rapeseed, sunflower oil samples as well as their mixtures (0, 5, 10, 20, 30, 40 and 50% levels) were determined using Gas Chromatography. Also, Machine olfaction system containing 10 MOS sensors was utilized for detection experiments. Sensor response patterns were used for analyzing and recognizing pattern of electronic-nose signals using multivariate data analysis, including Principal Component Analysis (PCA), Linear Discriminant Analyses (LDA), Partial Least Squares (PLS), K-Nearest Neighbors (KNN) and Support Vector Machine (SVM). Results of the SVM with RFB kernel in C-SVM method had the highest classification accuracy. The accuracy of training and validation were 96.34 and 90.56%, respectively, and next were LDA and KNN models with classification accuracies of 92.30% and 89.94%, respectively. In the light of these results, the proposed models along with the measurement system represent excellent tools for the detection of sesame seed oil adulteration with cheaper vegetable oils.

Metal-organic frameworks (MOFs) have been used as electrode materials in supercapacitors (SCs) due to their high specific surface area and suitable porosity size. However, using single-component MOFs in SCs leads to poor electrical conductivity, insufficient stability, and poor mechanical properties, and thwarts the effect of high capacity and efficient performance. In this paper, to improve the electron transfer rate and take advantage of the specific surface of MOFs, nickel-based metal-organic framework/graphene nanocomposites were prepared by hydrothermal in-situ synthesis, and to prevent agglomeration, graphene (0, 2.5, 5, and 10wt%) was added during the synthesis process. To characterize the structure of the nanocomposites, X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Brunauer–Emmett–Teller (BET), transmission electron microscopy (TEM), and field emission scanning electron microscopy (FESEM) were used. To study the supercapacitor behavior, electrochemical tests, such as cyclic voltammetry, electrochemical impedance, and repeatability behavior were used. The electrode prepared by the nickel-based MOFs in the 6M KOH electrolyte had a specific capacity of 660 F/g, while their composite with graphene had a specific capacity of 1017 F/g. As a result, benefiting from composite properties and increasing electrical conductivity of MOFs with graphene resulted in greater porosity availability and increased total storage capacity.

Adulteration in food products is regarded as a main challenge in food industry, which adversely affects food quality and health. Owing to pleasant taste and antioxidant properties, pomegranate paste is one of the most valuable and desirable foods in the people diets in some countries. As a luxury and expensive food, it is likely to be adulterated by some producers or distributors for the more profits. In this study development and application of machine olfaction system using array of gas sensors to detect adulteration in pomegranate paste was aimed. Principal Component Analysis (PCA), Linear Discrimination analysis (LDA) and Artificial Neural Network (ANN) methods were used to analyze response of the sensor arrays. Based on the results, PCA with two components PC1 and PC2 described 94% of total data variance. In LDA method, the classification accuracy of pomegranate paste samples was 97.65% which higher than PCA method. The values of correlation coefficient (R2) and root mean squared error (RSME) of neural network in ANN method using the structure of 6-9-7 were 0.984 and 0.0018 respectively. This study reveals that the electronic nose device can be used as a non-destructive tool to classify and detect adulteration of different classes of pomegranate paste.

The purpose of this research is investigate the effect of land use mix on public health in Mashhad city. Research is a developmental-applied research. Methodologically, and in the category of macro, it falls into descriptive researches and in subdivisions of case studies, surveys, and correlations. Data collection was based on documentary and surveys (Questionary) methods. Herfindahl-Hirschman, Frank et al (2006) and Shannon entropy used for analysis land use mix. Statistical Society includes citizens up to 25 years and sample size is equal to 1022 sample. The date gathered from 16 neighborhoods of Mashhad. The results showed that 19.7% of people were healthy and the rest were in mild to severe disorders. According to findings, in the case stidies, there was no significant correlation between land use mix with physical activity and daily walking. Studies also show that there is no significant relationship between land use mix with public health and its subdivisions in general and if there is a significant relationship in some cases, this relationship can be inversely correlated. In fact, the findings of this study showed that, contrary to previous studies, especially at international level, about the impact of land use mix on improving individual health in different dimensions, in Mashhad and the studied areas, such results were not obtained and vice versa, In some cases, land use mix has had a negative impact on citizens' health in some respects. 

Knowing the depth and type of the teeth impaction with radiographic approaches can guide the clinicians into selecting the most appropriate treatment and prevent surgical complications. Therefore, the purpose of this article was to evaluate the prevalence of canine and premolar impaction in the digital panoramic view of patients referred to Rasht dental school in 2019.

This annalistic-descriptive cross-sectional study comprised patients who attended the Faculty of Dentistry, Rasht, Iran in 2019. Dental records and panoramic radiographs of 500 patients were reviewed retrospectively. Demographic information as well as the type and depth of impaction, involved jaw, and also, the associated pathological lesions were recorded. Data were analyzed with SPSS24 version with significant level of P<0.05.

The findings revealed that among 500 individuals (300 (60%) were females and 200 (40%) were males), 35 individuals (7%) had at least one impacted tooth, 80% of impacted teeth were canines and the others were premolars. The most common impaction type, impaction level, and pathological lesion were mesioangular, B, and carries of the adjacent tooth, respectively. A significant relation was not observed between the type and level of impaction with the involved jaw (P=0.15, P=0.99) and also, the relation between the type of pathological lesion and gender was insignificant (P=0.85).

Functional and esthetic complications of impacted tooth can be prevented or declined by on-time radiographic screening.

The aim of this study was to identify and isolate bacteria and fungi that produce phospholipase and chitinase enzymes in Iranshahr fertile logic soil to identify and produce biological fertilizers for farmers in the province using microorganisms compatible with the geographical conditions of the region (secondary target). Sampling of soil from agricultural fields in fertile areas of Iranshahr city and soil sampling areas were diluted by 10+ 5. For Chitin, Shrimp substation, Sigma Aldrich USA and sterile egg yolk were used for phospholipase substrate. After merging the dedicated substrates bygeneral media culture, positive enzyme microstructures were identified and isolated by halo production. Enzymes were identified and confirmed by spectrophotometry testing and measurement of light absorption at 410 and 280 nm wavelengths. Samples were sent to South Korea's Macrogen Company for molecular identification. The predominant bacteria and fungi producing phospholipase were Bacillus subtilis and Mucor hiemalis, respectivelythe highest production of chitinase enzyme was observed in Pseudomonas putida and Mucor hiemalis microsatellites. Changes in pH showed that an increase in pH to alkalinity greatly reduced enzyme secretion. The highest levels of both enzymes were found in Mucor hiemalis

Metal-organic frameworks (MOFs) have been used as electrode materials in supercapacitors (SCs) due to their high specific surface area and the suitability of porosity. However, using single-component MOFs in SCs results in poor electrical conductivity, insufficient stability, and poor mechanical properties, and thwart the effect of high capacity and efficient performance. In this paper, to improve the electron transfer rate and utilize the specific surface of MOFs, graphene was combined by copper-MOF via hydrothermal in-situ synthesis. To prevent agglomeration, graphene (0, 2.5, 5, and 10 wt%) was added during the synthesis. To characterize the structure of nanocomposites, X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Brunauer–Emmett–Teller (BET), transmission electron microscopy (TEM), and field emission scanning electron microscopy (FESEM) analysis were used. Electrochemical tests such as cyclic voltammetry, electrochemical impedance, and repeatability behavior were performed to study the supercapacitor behavior. The electrodes made by graphene and the copper-based MOFs had the specific capacity of 217 and 187 F/g in a 6M KOH electrolyte, respectively, while their composite had the specific capacity of 550 F/g. As a result, the synergic effect in the composite and enhanced electrical conductivity of MOFs resulted in greater availability of porosities and increased total storage capacity.

This study was conducted to investigate the effect of dry corn gluten feed (DCGF) on nutritive value of corn silage by in vitro and in vivo methods. The firs stage of the experiment was conducted in a completely randomized design, included three treatments and 5 replicates, in which chopped corn forage was mixed with 0.0, 5 and 10 percent of DCGF and ensiled in 200L polyethylen barrels. After three months of ensiling, the silages were opened and evaluated. Voluntary intake and digestibility of the silages along with basal diet (Alfalfa hay+wheat straw+barley ground) were determined, using mature (two years old) male Shal sheep. Including of DCGF to corn silage increased (p<0.05)dry matter (DM) and crude protein (CP) in the silages respectively, but pH and organic matter values were not affected by the treatments. However, the DM content did not reach to optimum (35%) point. Concentration of neutral detergent fibre (NDF) was increased but acid detergent fibre (ADF) was decreased (p<0.05) as DCGF was increased in the corn silages. Addition of CGF increased dry matter intake of the silages (p<0.05). The digestibility of DM, OM and NDF were higher in silages containing  DCGF (p<0.05). The intake of the digestible DM, OM and NDF were higher in DCGF content silages than those of basal diet and control silage (p<0.05). In general,adding DCGF to corn silage could improve silage quality as well as increasing voluntary intake (g/d) and digestibility when fed to sheep.

This study was aimed to investigate the effect of adding dried dairy wastes to the starter diet on growth performance in Holstein dairy calves. A total of 28 female newborn Holstein dairy calves were randomly allocated to four groups (n=7/group) and after two weeks of habituation to experimental conditions and diet, in a completely randomized design, individually fed starter diets containing 0 (control), 10, 20, or 30% dried dairy waste up to eight weeks of age. Feed intake, weight gain, and feed efficiency (gained weight/consumed feed) were measured weekly, during the experimental period. Results showed that body weight, weight gain, feed intake, and feed efficiency were not affected by the treatments. Interactive effect of treatments by week showed that the highest weight gain was for calves fed by the diet containing 10% dairy waste or control group at first week. However, the highest gain was recorded for those that received 30% dairy waste at week five of the experiment (P<0.05). In conclusion, the results of the present study revealed that the inclusion of dried dairy products up to 30% of calves’ starter diet had no adverse effect on performance, and therefore can be used as an affordable and valuable nutritional by-product of the dairy industry in the nutrition of calves.

This research examines the role of open innovation intermediaries in facilitating communication between industrial enterprises (technology applicants) and technology-centric companies (technology providers). There is always a lot of challenges for technology exchanges and the needs of the industry. In the meantime, institutional existence is important to facilitate the process of technology exchange to increase interactions. However, as past experiences show, intermediary institutions in our country have not functioned well, and technological exchanges do not have the desired conditions. To this end, the purpose of this study is to provide a model for setting up such an institution. The method used in this study is quantitative. Initially, the functions of the intermediate entity were extracted and then, using the fuzzy Delphi technique, the proper functioning of an intermediary entity in the country was identified and divided. In the following, we study the effectiveness and effectiveness of the relationship between the factors using the fuzzy demilitarization technique and have been investigated using the Fuzzy Network Analysis Technique for weighting and prioritizing.

According to the theory of open innovation, organizations are better off to open their doors and interact with their environment to innovate and compete in the market. According to this principle, organizations do not need to do all activities related to the research and development of their products or technologies within the organization, but can collaborate with their environment in this respect. However, observing the environment, identifying all the required technologies of the organization, and even identifying customers to sell the unused technologies of the operating organization is very difficult and less organizationally able to carry out these processes alone. As a result, they need a bridge called intermediaries to link organizations to the environment. In this paper, we intend to check the origin of the intermediaries from the two dimensions of open innovation and markets, as well as the analysis and categorization of intermediary functions in the process of technology and innovation management. Finally, with the focus group method and through expert's opinions, the key function for intermediaries was extracted.

The benchmark for any media literacy training program is the critical exposure of students to their own use of the media, in order to decipher information received from various media and enhance their ability to independently judge media content. Regarding the knowledge structures of media literacy, the five main components of literacy, the emphasis on media content derived from communication theories, was the curriculum design. In the 15-syllabus curriculum, the teaching of media literacy teaching from different media (newspaper, article, book, animation, cartoon, promotional video) was used in the classroom. The present study was applied in terms of the method of data collection in semi-experimental (semi-experimental). In this method, two experimental and control groups have been selected and evaluated. And in a method based on the dialogue and the formation of a study circle for 60 people at the base of the sixth elementary school boy's guards witnessed a single argument, was carried out in 1395. The sample size is divided into groups of 30 in two classes, which are divided into two groups of control and testing. The results of this study indicate that the students of the experimental group compared to the control group students according to the training provided to them; with 99% confidence in media skills, media message analysis, ability to produce and the transmission of media messages, critical thinking in using the media, were at a higher level of media literacy skills.

Plant disease can cause quality and quantity reduction of agriculture crops. In some countries farmers spend considerable time to consult with plant pathologists, whereas time is an important factor to control disease, so it seems to offer a fast, cheap and accurate method to detect plant diseases. Since the fungal disease named ‘Powdery Mildew’ and ‘Anthracnose’ cause the greatest amount of damage in cucumber produced in greenhouses, thus in this research the mentioned two fungal disease detection and classification were studied using image processing and neural networks technique. Image processing steps includes four main steps: 1) Image acquisition 2) preprocessing 3) extraction of the best color parameters of HSV and L*a*b* color spaces in order to classify and extract defected area of the leaf and 4) extraction of textural properties of defected area of cucumber leaf using co-occurrence matrix. Since, two factors of accuracy and time are important in detection and classification of plant disease, thus artificial neural networks (ANN) with back propagation algorithm (BP) and Levenberg-Marquardt (LM) training function was selected as the best model that was able to successfully detect and classify mentioned plant diseases in 6 seconds with 99.96% accuracy.

Regarding nanotechnology development in Iran in recent years¡ projects within the framework of technological collaborations between nanotechnology suppliers in small companies and its applicants (industrial companies) were formed. In carrying out these projects¡ often parties face with some challenges mainly in the implementation phase that reduce its effectiveness. This study has been conducted to explain the challenges of these projects. This study is a survey research and data is collected by questionnaires and interviews. In this study¡ first¡ dimensions and indicators of important technological barriers to technological collaboration in the field of nanotechnology have been identified by a literature review and semi-structured interviews. Then¡ the questionnaire was design to obtain¡ identify and rank the comments of main actors of the technological collaborations¡ most important obstacles and challenges. The results show: weakness of intermediary institutions indicators in connecting technological collaboration parties; the buyer doubts about the risks of using new technologies and organizational bureaucracy processes of large companies interacting with technology providers; are the major challenges and obstacles in technological collaboration.

Cities historically the main center for accumulation of human groups, spiritual focus of investment and economic growth, which are the main centers. On the other hand, the center is always a constant target of the wars and military action between the parties to the conflict are discussed and Due to the important functions having critical facilities, critical, has been attacked during the war. Create stability and reduce injuries and fatalities in urban areas during the conflict of the important goals of urban planning authorities. Passive defense is one of the ways in which this approach has been of particular interest, officials and planners. The main purpose of this article is also critical to the pathology of urban land uses in medical centers and hospitals in times of crisis, the passive defense principles and requirements of professionalism. Study area The study also hospitals and medical centers in Mashhad Imam Reza (AS) are the Razavi. Hospitals based on two main factors, namely the design and method of localization based on passive defense were examined. The findings suggest that an important weakness Razavi Hospital in design, is a integrating the majority of hospitals in a building But regarding the existence of intelligent fire systems, air relief, access to networks and the conditions of proper outdoor parking is in good condition. Imam Reza Hospital, also in terms of distribution, access, metro, and access to fire stations and facilities an air relief in good condition but In contrast to the absence of intelligent fire systems, lack of adequate open space in and around the hospital grounds, parking, lack of access to class communication arteries and intersections and high traffic in the area around the hospital and the presence of the military in passive defense is not in good condition. At the end of the article, some suggestions for improving the condition of existing facilities and the design and general layout of new health centers, according to the principles of passive defense was offered.

UHMWPE، as a thermoplastic polymer and especially in the form of high performance fiber، has attracted much interest due to its exceptional tribological and mechanical properties. In this work، electrospinning process، known as a versatile، low cost، highly efficient and suitable technique for continuous production of fine fibers in micron or nanometer scale is employed to fabricate the UHMWPE/ZnO nanocomposite fibers. Electrospinning of UHMWPE has some inherently serious problems and limitations، due to its poor solubility in common solvents and low electrical conductivity of its solution. The most important issue is the necessity of maintaining the system temperature sufficiently high to prevent temperature depression and solution gelation during spinning. Fabrication of UHMWPE/ZnO nanocomposite fibers، containing 2. 5، 5 and 7. 5 wt% of ZnO nanoparticle، was carried out by self-modified vertical electrospinning at high temperature. An electrospinning system was first equipped with an infrared emitter (IR heaters) and then the conditions for fabrication of bead-free uniform UHMWPE fibers with an average diameter of 1. 8±0. 25mm were implemented. Under the acquired conditions، uniform and bead-free UHMWPE/ZnO nanocomposite fibers containing various percentages of ZnO nanoparticles were also successfully produced. UHMWPE/ZnO nanocomposite fibers exhibited much higher average diameter proportional to added percentage of nanoparticles. The morphology and the quality of nanoparticles dispersion within nanocomposite fibers were evaluated using field emission scanning electron microscopy (FESEM) equipped with EDAX mapping spectra. The results showed a well dispersed morphology، which was attributed to good compatibility between the ZnO nanoparticles، solvent and UHMWPE matrix.

In this paper, after collecting the rock samples from eight mines and one high way slope, the tests for determination of dry density, Uniaxial Compressive Strength, tensile Strength (Brazilian Test), elastic modulus, Schmidt hammer rebound number have been done on samples. In addition, in order to calculating the mean size of rock grains, quartz content, hardness and abrasivity, a thin sections of each rock have been studied. Then, the rock samples have been drilled using actual pneumatic top hammer drilling machine with 3½ inches diameter cross type bit. The regression analyses showed that Brazilian tensile strength (R2=0.81), uniaxial compressive strength (R2=0.77) and Schmidt hammer rebound (R2=0.73) are the most effective parameters on drilling rate and have a partly good correlation with drilling rate.

The aim of this study was to compare the viewpoints of medical and nursing students on development of telemedicine procedures at Mazandaran University of Medical Sciences. This was a cross-sectional study. Ninety medical students and 55 nursing students were selected using stratified random sampling in the first semester of 2011-2012. The students'' viewpoints on creation and development of telemedicine were measured using a questionnaire. The questionnaire included demographic section، and the students'' viewpoints on telemedicine and different telemedicine tools. The reliability of the questionnaire was assessed using the Cronbach''s alpha coefficient. Statistical tests were used to analyze the data including the t-test and ANOVA for quantitative variables; and Mann-Whitney and Kruskal-Wallis and Chi-squared tests for qualitative variables. There were significant relationships between information literacy and organizational factors with gender (P≤0. 001). There were also significant relationships between the stakeholders'' factors with gender and family location (P≤0. 001). There were significant differences between the medical and nursing students'' viewpoints on the factor of stakeholders (p=0. 029). Medical and nursing students'' viewpoints were similar except for the stakeholders factor. Community and family support for development of telemedicine tended to develop differences in the viewpoints of the students

Background and The importance of studying mental health at universities is precious، because of expressed linkage to the students'' educational progress. The main goal of the current research has been the study of effects of mental health on educational progress among students of Mazandaran University of Medical Sciences، in the year 2012. This research is a descriptive-comparative cross-sectional study. The subjects included 334 students، 153 males and 181 females of Mazandaran University of Medical Sciences which were selected through stratified random sampling. In order to gather the research data، the Goldberg''s General Health Questionnaire (GHQ-28) was used. %45. 8 of students had good mental health status، while %54. 2 of them was suspected to have mental health disorders. Between age، gender، faculty، birth order، parental status، university entrance semester، and mental health of students، there were not significant differences (P≥ 0. 05)، but the variable «marital status» (P=0. 034)، the variable «average monthly earnings» (P≤0. 001)، and average grade points of students (P≤0. 001) were related to their mental health. Another finding of the research showed that most of students had some degree of disorders linked to the four dimensions of questionnaires'' queries، most disorders were social function. Considering the results of this study، including the mutual correlation between mental health and academic performance، the high rate of mental problems and suspect cases of mental disorders among the students، the serious attention to this issue is of high importance to resolve the mental health problems of students and activating Students Consultancy Centers. Hence، the assistance of consultants، professors and specialists، comprehensive planning، and interventions towards the promotion of mental health to prevent and treat psychological disorders، will be effective for students'' educational progress.

In this paper, after collecting the rock samples from eight mines and one high way slope, the tests for determination of dry density, Uniaxial Compressive Strength, tensile Strength (Brazilian Test), elastic modulus, Schmidt hammer rebound number have been done on samples. In addition, in order to calculating the mean size of rock grains, quartz content, hardness and abrasivity, a thin sections of each rock have been studied. Then, the rock samples have been drilled using actual pneumatic top hammer drilling machine with 3½ inches diameter cross type bit. The regression analyses showed that Brazilian tensile strength (R2=0.81), uniaxial compressive strength (R2=0.77) and Schmidt hammer rebound (R2=0.73) are the most effective parameters on drilling rate and have a partly good correlation with drilling rate.