Showing 6 results for Hosseinabadi
Volume 4, Issue 4 (Fall 2024)
Abstract
Kitab al-Alal explains the principles and first causes of things and discusses God. The issue of this article is the ontological position of intelligence in Kitab al-Alal. The question is, what is the ontological position of intelligence in Kitab al-Alal, and how can it be explained? Is it possible to assign the position of teleology to the perfection and happiness of man in the Book of Causes? In terms of existence, intelligence is the first creature and the closest being to the first cause, and it is in the second place after the first cause. The ontological effectiveness of intelligence is measured in two ways: planning, ruling, and creating. The act of intellection is the act of creation. In this article, to explain this issue and answer the questions descriptively and analytically, we will explain and analyze the chapters related to intelligence.
Volume 10, Issue 5 (Supplementary Issue - 2008)
Abstract
Medium Density Fiberboard (MDF) was produced using moist depithed bagasse stored dry or wet. The duration of storage for either method varied between 0 to 4 months. Two steaming temperatures of 175C and 185C were also used. MDF boards were produced in the laboratory and the common mechanical and physical properties were measured and compared. Results showed that an increased steaming temperature and storage time (especially for the wet storage method) have negative effects on the mechanical properties and positive effects on the physical properties (water absorption and Thickness swell). The mechanical properties of boards produced from bagasse as received (fresh bagasse) and at a steaming temperature of 175C were superior to others. The modulus of Rupture (MOR), Modulus of Elasticity (MOE) and Internal Bond (IB) of boards from fresh ba-gasse were 29.7 MPa., 3,127 MPa., and 0.52 MPa. respectively. However, the physical properties of boards produced from bagasse after 3 months’ wet storage and a steaming temperature of 185oC were superior, and were measured at 44.3% and 63.9% for water absorption after two and 24 hours’ immersion (WA2, WA24 ), and 11.5% and 17.6% for Thickness Swelling after two and 24 hours immersion (TS2, TS24 ) respectively.
Volume 11, Issue 2 (Spring 2023)
Abstract
Aims: Research capacity building and self-efficacy are essential skills for medical students that greatly help them to participate in research. The present study aimed to investigate the relationship between academic stress and research self-efficacy in medical students through the mediating role of research spirit.
Materials & Methods: This descriptive-correlational study used path analysis to examine the relationships between the variables. The statistical population was all postgraduate medical students in Ilam in the academic year 2022-2023, of whom 301 students were selected using convenience sampling. They completed the Research Self-Efficacy Scale, the Academic Stress Scale, and the Research Spirit Questionnaire. Evaluation of the proposed model was done using path analysis.
Findings: There was a negative correlation between academic stress and research spirit (p<0.001). There was a significant positive correlation between research spirit and research self-efficacy (p<0.001), whereas there was no significant correlation between the direct path of academic stress to research self-efficacy. Also, there was a significant correlation between the indirect path connecting academic stress and research self-efficacy through research spirit (p<0.01).
Conclusion: Based on the results, the proposed model shows a good fit and is a major step toward identifying factors influencing research self-efficacy among medical students.
Volume 13, Issue 1 (Winter 2025)
Abstract
Aims: Excessive water extraction, inefficient management, climate change, and population growth have created significant global water supply challenges, particularly in arid and semi-arid regions such as Iran. Rainwater Harvesting Systems (RWHS) have emerged as an effective water management strategy. This study investigates the role of rainwater harvesting in fulfilling the water needs of dairy cattle and broiler chicken units in Gorgan County, Golestan Province.
Methods: This research analyzes annual precipitation levels, roof surface areas, and water requirements of livestock and poultry. It also evaluates the compatibility of collected rainwater with physical, chemical, and microbiological standards recommended by the German Federal Ministry of Food and Agriculture (BMEL).
Findings: Rainwater harvesting can meet 87.07% of annual water requirements in broiler chicken facilities, equivalent to 214,711 m3. y-1, demonstrating significant potential to reduce dependency on alternative sources. In contrast, this percentage is only 1.05% for dairy cattle units, equivalent to 13,432 m3. y-1, due to their higher water consumption. The analysis of rainwater quality shows compliance with BMEL standards, indicating favorable water quality.
Conclusion: Rainwater harvesting effectively manages water resources in livestock and poultry farming, particularly in the poultry sector. These findings inform sustainable solutions for water scarcity challenges and highlight the potential of alternative water collection methods to alleviate resource pressures, especially in environmentally and agriculturally constrained regions. The study provides valuable insights for strategic water planning and sustainable agricultural development, emphasizing the varying efficiencies across farming sectors.
Volume 16, Issue 88 (6-2019)
Abstract
Nowadays the use of natural and biodegradable nanofibers in the packaging industry due to the contamination of non-biodegradable polymers in food packaging is dramatically obvious and electrospinning is one of the easiest ways to produce these nanofibers. In this study, the electrospinning of collagen polymer type I (extracted from the rat-tail) with Beta Cyclodextrin and Nanoclay was investigated and Acetic acid was used as a safe solvent in terms of the environment. After designing the experiments using an experimental design software (Design Expert 7.0), the effects of independent variables such as weight-weight ratio of Beta Cyclodextrin to Collagen (X1), Volume-weight ratio of Nanoclay to Collagen (X2) and solution feed rate (X3) was evaluated on dependent variable, including nanofibers diameter (Y1). Also, electrospinning process was performed with a voltage of 12 Kv and the distance between the needle and the collector 120 mm at ambient temperature and pressure. Nanoclay have been used due to barrier and antimicrobial properties; in addition, Beta cyclodextrin was used for the specificity of the structure that causes hydrophilic and hydrophobic surfaces. Furthermore, to investigate the shape of nanofibers Scanning Electron Microscopy, to investigate the structure Transform Infrared Spectroscopy, to investigate existing elements X-Ray Fluorescence Spectroscopy and to determine thermal resistance Differential scanning calorimetry was applied. The results showed that optimal nanofiber with a average size of 123.01 nm and a flawless structure with a viscosity of 145.33 mpa.s was obtained.
Volume 18, Issue 118 (December 2021)
Abstract
Today, saturated and trans fatty acids are one of the most important potential health limitations of consuming prepared foods. Fast foods are widely consumed by adults and children due to their quick preparation and the popularity of the taste. As a result, it is very important to control the amount of saturated and trans fatty acids in fast foods. The city of Tehran was divided into five regions: north, south, west, east and center, and from each region, three types of fast food, including mixed pizza, falafel and Chicken nuggets, and three samples from each fast food (a total of 45 samples from 45 different grocery stores were randomly selected). In this study, the concentration of trans fatty acids was calculated as a percentage by Agilent7890A gas chromatography. The average of saturated fatty acids in falafel fast food, mixed pizza and chicken nuggets were 18.02, 36.35 and 19.11 g / 100g, respectively. The average trans acids of chicken nugget fast food, mixed pizza and falafel were 0.36, 0.71 and 0.06 g / 100g, respectively. The difference between different regions of Tehran was not significant in terms of saturated and trans fatty acid content (P> 0.05). Consumption of trans fatty acids through fast food in Tehran is appropriate in comparison with international standards. The lower risk factors than the global standards in this study is due to the low per capita consumption of fast food in Iran (IR = 4 g / day).
