List of Articles Field Experiment

• Open Access Article
  • Abstract Page
  • Full-Text
  
  1 - Investigation of Field Experiments and Mathematical Models for Heavy Gas Dispersion
  Narjes Hemati Alam Eslam Kashi Razieh Habibpour
  10.30495/jest.2019.21912.3126
  Background and Objective: Release and dispersion of toxic and flammable gases in atmosphere is one of the most important incident in safety of the processes. Risk analysis with the aim of prevention from harm and damage usually carries out by software packages, which ar More

  Background and Objective: Release and dispersion of toxic and flammable gases in atmosphere is one of the most important incident in safety of the processes. Risk analysis with the aim of prevention from harm and damage usually carries out by software packages, which are based on the field experiments and mathematical models.Material and Methodology: In order to derive dispersion models and evaluate existing models, some different experiments are done. Experiments of the gas release and gas dispersion are in two categories, experiments which took place in wind tunnels and which are field experiments. Kit Fox, Thorney Island and coyote are some of the most famous field experiments. PERP group and EMU tests are major experiments in wind tunnels.  In many of studies, gas dispersion was investigated in the open places in absence or presence of obstacles because most of the industrial accident happens in open places. Others are also taking place in indoors and large buildings. Early, simple models such as box models, steady state plume and integral models were proposed. Thereafter, group models like Lagrangian models and Lagrangian- Gaussian models were evinced. One of the other approach is using more complex and computational methods. Fluid dynamics methods are designed and developed for this purpose. The models of the heavy gas dispersion can be categorized to four major group. The first is simple and experimental models. intermediate and integral or shallow layer models include box models, steady state / general steady state plume models, one dimensional integral models is located in the next. The third group is advanced and lagrange models. The last and latest models are computational fluid dynamic models: RANS, LES and DNSFindings: Different gases, distinct release scenarios are studied in researches. As another effective parameter on the path of gas dispersion, topology of release location can be mentioned which is investigated in field experiments and simulations.Discussion and conclusions: in order to use and refer the field   experiments and models as an evaluation, desired scenarios’ condition should be as close as possible to the models or experiments’ condition. These conditions could be such as type of gas, terrain and topology of release path, puff or plume release and other environment and physical conditions.  Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  2 - 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 Aboutalebian
  10.30495/jcep.2019.666246
  To 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 More

  To 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
  • Abstract Page
  • Full-Text
  
  3 - Money Priming and Trust among Children: Evidence of a Field Experiment
  Zahra Ebrahimi Masoud Homayounifar Mehdi Feizi
  10.30495/eco.2021.1897413.2345
  In addition to typical functions of money such as a medium of exchange, a means of evaluation, and storing the value of goods and services, it also has a symbolic character. Money due to its symbolic character can be used as a social goal in regulating interpersonal and More

  In addition to typical functions of money such as a medium of exchange, a means of evaluation, and storing the value of goods and services, it also has a symbolic character. Money due to its symbolic character can be used as a social goal in regulating interpersonal and intrapersonal relationships. On the one hand, priming is one of the most important ways to highlight the symbolic aspect of money. On the other hand, trust is one of the essential aspects of human relations. We conduct a trust game experiment on 511 fourth-grade girl students from the public schools in Mashhad. The results showed that children primed with money in the experimental group, on average, trust more than the control group. Manuscript profile