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Open Access Article
1 - steganography in images, based on pixel value differencing in 16-pixels blocks
Bashir Omrani Harzand Mohammadreza Motadel Ali BroumandniaNowaday, steganography as an art or technique for hiding data in various media, has a wide variety of applications in information management. steganography can be used to convey a confidential message, enhance information security, categorize information, store specific MoreNowaday, steganography as an art or technique for hiding data in various media, has a wide variety of applications in information management. steganography can be used to convey a confidential message, enhance information security, categorize information, store specific information, and more . Image is one of the most popular media used in data hiding process and there are various methods for hiding information in images, the most common of which is the method of embedding information in low-value bits of the image and for which various algorithms and methods have been developed. One of these methods, which has a mathematical basis, is to use the calculation of the difference between the values of two adjacent pixels in order to identify suitable points for embedding confidential information. In this paper, two new methods for data embedding in images are proposed based on calculating the differences in the values of adjacent pixels in 4*4 blocks and tested on different images using the Mean Squares of Errors, Peek signal-to-noise ratio and structural similarity criterias has been studied and analyzed. Evaluations show that the first proposed method is optimal due to better results. Manuscript profile -
Open Access Article
2 - Analysis of trends in temperature parameters in Iran
مرتضی میری mojtaba rahimiAbstract Today, climate change and its anomalies, one of the important issues raised in the world. Detection of changes on temperature and precipitation as the most important climatic elements, is used as primary evidence of climate change in many parts of the world. T MoreAbstract Today, climate change and its anomalies, one of the important issues raised in the world. Detection of changes on temperature and precipitation as the most important climatic elements, is used as primary evidence of climate change in many parts of the world. This paper investigates the temperature trend of Iran of annual, monthly and seasonal scales. For this purpose minimum, average and maximum temperature data of 38 synoptic stations, over the period of 50 years (1960-2010) with good distribution, were obtained from Iran meteorological organization. Then the temperature trend parameters were investigated (studied) by Mann Kendall nonparametric test. The results showed that the general temperature trend is increased in most of the stations for different time scales; however this intensity of increase decreases from the minimum to maximum temperature. On monthly, in June and July, and on seasonal, in summer, the increase of temperatures are higher than other time. Although the most frequency positive trend of the maximum and average temperature observed in the winter, but for a few of the stations was significant. While in warm seasons especially in the summer, the frequency of station with positive significantly trend is higher. In terms of spatial, the stations that located in the Alborz Mountains, South West and South East of IRAN have experienced higher temperatures than other areas of the country and in some station such as SHAREKORD, URIMA, KHORRAMABABD AND BANDAR ABASS trend of temperature in different scale is mostly decreasing. Manuscript profile -
Open Access Article
3 - Measurement of citizen participation in urban management desired - Case study District 8 in Qom-
Seyed Baqer Hosseini Mohsen KameliIntroduction and Objective: This paper has been prepared to assess the components of citizen participation in urban management and based on the findings and results of a survey of area 8 in Qom (City Campus) Research method: Type of research is the application devel MoreIntroduction and Objective: This paper has been prepared to assess the components of citizen participation in urban management and based on the findings and results of a survey of area 8 in Qom (City Campus) Research method: Type of research is the application development and this Methods study is descriptive and analytical. The method has been collecting information on the library, documents and athletics by using the questionnaire construction and has been used with SPSS software. Conclusion: The results suggest that the degree of citizen participation between men and women there was a significant difference between age and the participation of a significant relationship was observed. Also there are significant correlations between sense of community and citizen participation. This means that the rise of social belonging, participation of citizens has increased. Social relationships and social belonging variable high correlation with all three dimensions. There are significant correlations between sense of community and citizen participation. Manuscript profile -
Open Access Article
4 - The spatial relationship between climatic factors and air pollution in the last 10 years of Tabriz city
Fahimeh Banasaleh Mohammad Ebrahim Ramazani Ziba BeheshtiAir pollution poses a significant threat to many cities in Iran, with Tabriz the bustling metropolis, being particularly affected. Factors such as rapid population growth, rural migration, industrial expansion, vehicular density, topographical features and natural facto MoreAir pollution poses a significant threat to many cities in Iran, with Tabriz the bustling metropolis, being particularly affected. Factors such as rapid population growth, rural migration, industrial expansion, vehicular density, topographical features and natural factors have collectively contributed to Tabriz becoming one of Iran’s most polluted cities. Beyond human-related factors, geographical factors including location, topography, and temperature inversions also play a crucial role in exacerbating air pollution in Tabriz. In this research, descriptive research methods drawing from meteorological and air pollution data sources were employed to investigate the spatial relationship between climatic factors and air pollution in Tabriz. By collecting and analyzing information from meteorological stations in Tabriz and air quality measurement stations related to Tabriz, we created integrated maps using Geographical Information System (GIS) software. These maps visually depicted pollution distribution and zoning. According to the results of the research, a significant spatial relationship and correlation exist between meteorological parameters and air pollution parameters. Additionally, the distribution of air pollution parameters across the surface of Tabriz city reveals that the highest pollution levels, attributed to polluting gases such as SO2, NO2, O3, and CO, occur in the western and central parts of the city. Conversely, suspended particles contribute to the most pollution in the eastern side of Tabriz. Furthermore, the seasonal quality index indicates that summer and spring experience the least air pollution, while autumn and winter exhibit the highest levels. Manuscript profile -
Open Access Article
5 - The effect of collaborative learning to handle the country (in the classroom) with teacher assistance in Second high school female students
Mansoor Salehi kazem AbdollahpourThe purpose of this study is to investigate model of collaborative learning of handle country in the classroom with teacher assistance design. The study is a kind causal- comparative of quantities Research. The statistical population included all of the Second high scho MoreThe purpose of this study is to investigate model of collaborative learning of handle country in the classroom with teacher assistance design. The study is a kind causal- comparative of quantities Research. The statistical population included all of the Second high school female students (957 students) of Kahnuj city. 120 students were selected by random- sampling (68 grade 10th and 52 grade 11th). The physics exam scores were used to collect data, These exams were held in November and April 2013- 2014 school year. To analyze the data, t-test, descriptive statistics and the effect size were used.The findings showed that there is significant differences between performance of students in the design teacher assistant and handle the country (p<0/01). Effect size values at the grades of the tenth, eleventh and total confirmed a significant difference, also these values expressed that The performance of students in the handle of the country's design has improved than teacher assistant design. This study emphasizes on this topic that can be created significant change in students learning by native pattern of fits country. Manuscript profile -
Open Access Article
6 - Effect Education with Conceptual Mapping on the Academic Achievement of Biology Lesson for High School Students in Kohgiluyeh and Boyer Ahmad
mohsen taghizadeh Eskandar Fathiazar moslem azarbakhshThe purpose of this study was to determine the effect of educational method using a conceptual mapping on the amount of learning in the course of biology, especially in terms of meaningful learning. For this purpose, a quasi-experimental design with pre-test and post-te MoreThe purpose of this study was to determine the effect of educational method using a conceptual mapping on the amount of learning in the course of biology, especially in terms of meaningful learning. For this purpose, a quasi-experimental design with pre-test and post-test was used. The statistical population of this study was the third grade high school students of Kohgiluyeh and Boyerahmad Province in the year 2013-2014. Two classes were selected through purposeful sampling (each class included 20), in the control group, the students learned the lessons in the usual way, and in the experimental group the curriculum was presented in the form of conceptual maps to the students. The impact of this application on the learner's academic achievement in the biology course was measured through academic achievement tests with acceptable indicators of validity and reliability. The findings of the present study show that conceptual learning training has a positive effect on the degree of academic achievement of the biology course as well as its meaningful learning. Manuscript profile -
Open Access Article
7 - The effect of examining the correlation of traits and decomposition into main components, cycocel and micronutrients, on the model of stress indicators, physiological traits, oxidant enzymes, yield and yield components of corn (Zea mays cv. Sc 704) u
Seyed nouradin Ghaffari khalaf Mohammadi Alireza Shokufar Mani Mojaddam Shahram Lak aziz afarineshThis study was carried out in the two crop years of 2016 and 2017 at Safi Abad Research Center. The experiment was conducted as a factorial split plot in the form of a randomized complete block design with four replications. The main factor of the experiment was to cut MoreThis study was carried out in the two crop years of 2016 and 2017 at Safi Abad Research Center. The experiment was conducted as a factorial split plot in the form of a randomized complete block design with four replications. The main factor of the experiment was to cut off irrigation at three levels (control), cut off irrigation at the stage Silking and cut off irrigation at the stage Blister and the secondary factor wascycocel zero, 442.5 and 885 mg/l Micronutrients were zero, 1000 and 1500 gr/ha and control. The correlation results of the assessed traits with each other were determined, seed yield with plant height, number of seeds per cob, thousand seed weight had a significant positive correlation with hydrogen peroxidase, malondialdehyde, electrolyte leakage rate, catalase activity, peroxidase, superoxide dismutase and proline in leaves showed a significant negative correlation, the highest positive correlation was related to the number of seeds in the cob (0.893) and the highest negative correlation was from electrolyte leakage (-0.945) and hydrogen peroxide. (-0.854) was observed. The placement process of different amounts of micronutrients and cycocel was determined; So that different levels of micronutrients tend to be more towards the center; And consumption of 1000 gr/ha tends to zone III and the zone where yield and yield components are located. In general, it was found that foliar spraying with concentrations of 1500 gr/ha of micronutrients and 885 mg/l of cycocel by reducing the negative effects of stress, could be suitable treatments to increase tolerance toin corn stress at the end of the season. Manuscript profile -
Open Access Article
8 - Creating Significant Learning Experiences to Use with Curriculum Elements
Alireza Araghieh -
Open Access Article
9 - The Effect of Knowledge Management Practices on Employees' Psychological Empowerment
Aliakbar Ahmadi Alireza Malek Aorzaman Mehdi ShykhlarOrganizers are well aware that if they want to be proactive in the economy and labor market and do not miss competition, they should have creative, professional, highly motivated manpower, and a useful technique for achieving this goal is through by use of employee empo MoreOrganizers are well aware that if they want to be proactive in the economy and labor market and do not miss competition, they should have creative, professional, highly motivated manpower, and a useful technique for achieving this goal is through by use of employee empowerment that is influenced by several factors, one of which factor is knowledge management.The present study considers how and what extent the improvement of knowledge management capacity cans effect on promotion of psychological empowerment in the organization. The research method is descriptive and correlational. Statistical society include 340 regional experts of the Islamic culture and relations organization that 180 person were selected by random sampling method. After distribution of questionnaires, the data were analyzed by software PLS and SPSS. The research results indicated that knowledge management has a positive and significant impact on psychological empowerment. In this regard some proposal to upgrade the existing situation is presented. Manuscript profile -
Open Access Article
10 - Improvement of Physiological Growth Indices and Yield of Soybean (Glycine max L.) by Replacing some of Nitrogen with Phosphorus under Moisture Stress
Farasat Sadeghi Mohammad Ali AboutalebianTo study some growth indices of soybean under moisture stress by replacing nitrogen with phosphorus, a field experiment was conducted at the Research Station of Bu-Ali Sina University during the 2017-2018 growing season. The experiment was carried out in a split-factori MoreTo study some growth indices of soybean under moisture stress by replacing nitrogen with phosphorus, a field experiment was conducted at the Research Station of Bu-Ali Sina University during the 2017-2018 growing season. The experiment was carried out in a split-factorial arrangement of treatments based on randomized complete block design with three replications. The main plots consisted of three levels of irrigations (irrigating after 60, 90 and 120 mm evaporation from class A evaporation pan). Two levels of nitrogen replacement with phosphorus and without replacement and two levels of phosphorus replacement and without phosphorus replacement assigned to subplots. The results showed that simultaneous replacing of nitrogen and phosphorus in all irrigation levels increased physiological growth indices of leaf area index, dry matter accumulation, crop growth rate, relative growth rate and net assimilation rate. Moisture stress reduced growth rate of the crop significantly. Results also showed that crop growth rate increased 35 to 45 days after planting and reached to its maximum level after 65 days after planting date. After this period, the crop growth rate of soybean decreased and reached to zero about 95-100 days after planting. The highest dry matter accumulation and crop growth rate were obtained from irrigation after 60 mm evaporation and nitrogen-phosphorus simultaneous placement application. According to the results, simultaneous replacing nitrogen and phosphorus, reduced the negative effect of moisture stress on soybean growth indices. Nitrogen replacement with phosphorus increased grain yield by 11.4% as compared to non-replacement of nitrogen with phosphorus and yielded 3855.88 kg.ha-1. In this research, nitrogen replacement with phosphorus under irrigation after 90 mm evaporation prevented significant oil yield loss as compared to irrigation after 60 mm evaporation. Manuscript profile -
Open Access Article
11 - Alterations in acute phase proteins, hemogram and electrophoretic pattern of equine serum proteins following change of diet from forage to forage mixed with concentrate
Rouhoullah Karampour Mohammad Razi Jalali mohammad rahim haji hajikalaei Alireza Ghadrdan mashhadiDespite extensive studies on the relationship between diet type and its effect on equine biochemical factors, little is known about horse serum and plasma proteins following changes in diet from forage to forage mixed with concentrate. Acute phase proteins are a group o MoreDespite extensive studies on the relationship between diet type and its effect on equine biochemical factors, little is known about horse serum and plasma proteins following changes in diet from forage to forage mixed with concentrate. Acute phase proteins are a group of serum proteins whose concentrations increase in response to infections, inflammation, trauma, and neoplasia. Therefore, in the present study, we evaluated the serum levels of serum biomarkers, fibrinogen and total protein concentration along with the nutritional behavior of horses during diet change. For this purpose, two types of diets, including forage (first treatment) and mixture of forage with concentrate (second treatment) were used for each horse for fifteen consecutive days. Complete blood cell counts as well as serum levels of fibrinogen, haptoglobin and amyloid type A were measured before and after dietary changes. Serum fibrinogen, haptoglobin and amyloid A levels were significantly increased in horses of the second treatment group compared to horses in the first treatment group (p<0.05). There was also a statistically significant difference in the complete blood cell count due to the change of diet from forage to forage mixed with concentrate (p<0.05). It seems that changes in the natural flora of the horse's digestive tract following a change in diet can protect the animal's body against acute inflammatory and traumatic injuries. Manuscript profile -
Open Access Article
12 - The Effect of Investment Opportunities, Growth and Capital Productivity on Firm Performance of Listed Companies in Tehran Stock Exchange
Heidar Mohammadzadeh SaltehInvestors seek to maximize their wealth. Growth opportunities are the driving force that give motivation and are considered bonus for investors. What in the current situation will lead to success is the optimum use of the available investment opportunities in order to i MoreInvestors seek to maximize their wealth. Growth opportunities are the driving force that give motivation and are considered bonus for investors. What in the current situation will lead to success is the optimum use of the available investment opportunities in order to identify the factors affecting the firm's performance. Timely and rational use of investment opportunities by business units has a significant effect on performance improvement. Firm growth, from the perspective of capital market and management is an important variable and can be effective on firm performance. Therefore, in this research, the effect of investment opportunities and growth on firm performance of listed companies in Tehran Stock Exchange has been studied. The statistical population includes the companies listed in Tehran Stock Exchange, out of each a statistical sample of 134 corporates was selected by systematic elimination sampling method. The period under review was a 5-year period (2007-2011) and the hypotheses in this research were tested by using combined data (panel). The results show that investment opportunities do not affect firm performance, and firm growth has a positive and significant effect on return on asset but does not affect market value added. Also, capital productivity has a positive and significant effect on firm performance. Manuscript profile -
Open Access Article
13 - Examining the mediator role of job engagement in the ralationship between significant work and organizational commitment of faculty members
Marzieh Heydari -
Open Access Article
14 - Scrutiny of how to use ornament of allusion in poet's Khaghani and introduction him imagination in this zone
Akbar hosein pour Moslem ahmadiIn this writing, efforts have been made to evaluate the method of application of historical pieces from the perspective of meaning and concept, and structure in balladries of Khaghani. The result of this research shows us that he, in addition to using historical pieces, MoreIn this writing, efforts have been made to evaluate the method of application of historical pieces from the perspective of meaning and concept, and structure in balladries of Khaghani. The result of this research shows us that he, in addition to using historical pieces, like other poets, tried to treat this arrangement based on his most fundamental thinking; meaning innovation, so much so that, this approach lead to breaking the old structures in relations between elements of myth. Reconstruction and recreation of a new narration from the same myth in his works, not only caused more expansion of meaning but also brought artistic ambiguity along with it which is easily understandable in intertwined layers of applied literal industries in his balladries. Manuscript profile -
Open Access Article
15 - The Role of Perceived Pressure on Accountants' Ethical Beliefs in Financial Reporting
Zeynab Yazdi Bahman Banimahd Hashem NikoomaramAbstract The purpose of this study is to investigate the effect of perceived ethical pressure on ethical beliefs in financial reporting (fraudulent financial reporting for significant and insignificant amounts, opportunistic and efficient earnings management). This res MoreAbstract The purpose of this study is to investigate the effect of perceived ethical pressure on ethical beliefs in financial reporting (fraudulent financial reporting for significant and insignificant amounts, opportunistic and efficient earnings management). This research is an applied research. The statistical population of this research is people working in the accounting profession, including financial managers, accounting supervisors, and accounting experts of private companies and companies admitted to the Tehran Stock Exchange. The data of the research was collected through a questionnaire in a random way and using the structural equation model with the approach of Partial Least Squares (PLS) was analyzed. To determine the sample size, ten times the highest index of the measurement model was used, and 201 people were selected as the sample size. Findings show that perceived ethical pressure has a negative and significant effect on ethical beliefs. Ethical beliefs also have a negative and significant effect on opportunistic and efficient earnings management, fraudulent financial reporting for significant and insignificant amount. Therefore, the pressure perceived by accountants creates stress in them and prepares the ground to neglect ethical approaches and affects their performance. It also alters one's beliefs and causes questionable behaviors in financial reporting. Numerous studies have shown that companies manipulate financial statements to achieve their goals through Income management and fraud. But what is unknown; is behavioral factors that psychologically influence the person to manipulate the financial statements. Therefore, there is a need to better understand the moral nature of a person and the factors related to it that encourage people to abandon moral beliefs and participate in unethical behaviors. This study addresses this research gap in the literature by revealing this unknown aspect of behavior on which there are incomplete studies. Manuscript profile -
Open Access Article
16 - The Efect of Adding Prebiotic, Synbiotic and Phytobiotic Supplements in the Diet on Growth Performance, Carcass Traits, Apparent Digestibility of Nutrients and Some Blood Parameters of Fattening Zell Lambs
Mehdi Saravani Mohsen Hajipour Kaveh Jafari Khorshidi Seyed Makan Mousavi Kashani Parvin ShawrangIn this study, the effect of adding prebiotic, synbiotic and phytobiotic supplements in the diet on growth performance, carcass traits, apparent digestibility of nutrients and some blood parameters of fattening Zell lambs was investigated. For this purpose, 24 Zell male MoreIn this study, the effect of adding prebiotic, synbiotic and phytobiotic supplements in the diet on growth performance, carcass traits, apparent digestibility of nutrients and some blood parameters of fattening Zell lambs was investigated. For this purpose, 24 Zell male lambs with an avrage age of about 5 months and an avrage weight of 25.4±0.50 were used for 90 days. The experimental treatments included 1- control group (no supplement), 2- treatment containing 2 g of A-Max prebiotic supplement, 3- treatment containing 4 g of Biomin IMBO synbiotic supplement, and 4- treatment containing 6 g of Bioherbal phytobiotic supplement per head of lamb per day. The growth performance results showed that there was a significant difference between the experimental treatments in the fattening weight, dry matter intake, daily weight gain and feed conversion ratio (p < 0.05). The highest weight at the end of the fattening period, dry matter intake and daily weight gain were observed in the treatment of 4 g of synbiotic supplement. The treatment with 6 g of phytobiotic supplement had the lowest feed conversion ratio. The highest apparent digestibility of dry matter, NDF and ADF was observed in the treatment of 4 g of synbiotic supplement (p < 0.05). The results of some blood serum parameters showed that there was a significant difference in the concentration of glucose, cholesterol, triglyceride and blood urea nitrogen between the experimental treatments (p < 0.05). The highest concentration of glucose was in the treatment of 4 g of synbiotic supplement, the lowest concentration of cholesterol was in the treatment of 6 g of phytobiotic supplement. Blood urea nitrogen had the lowest concentration in the treatment of 4 g of synbiotic supplement. The treatment with 4 g of synbiotic supplement had the highest hot carcass weight, hot carcass percentage, cold carcass weight, cold carcass percentage, thigh percentage and shoulder percentage (p < 0.05). The present research showed that the addition of 4 g of synbiotic supplement in the diet improved the growth performance, valuable parts of the carcass and the apparent digestibility of nutrients in fattening lambs. Manuscript profile
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