امیرحسین آقایی

In today's digital age, it is undeniable that internet penetration rates continue to rise, and social media's influence has transformed consumers into content creators. Brands and businesses recognize the opportunity to connect with their key stakeholders through social media to avoid potential risks. The atmosphere of social media platforms and the ability to analyze audience engagement methods have become essential for brands to navigate this landscape successfully. Digikala, as the leading online retail platform in Iran, takes advantage of the potential of diverse social media channels to realize its objectives. Furthermore, the unique and general atmosphere predominant on Twitter, a microblogging platform, necessitates a nuanced understanding of user interaction. In light of these considerations, the present research aims to analyze the way in which the audience-customers engage with the Digikala brand on Twitter. The objective of the research is applied and exploratory in nature. A quantitative approach has been utilized, complemented by data mining and network analysis of social networks. The hashtag platform, a social media monitoring tool, has been utilized to collect and analyze data, specifically focusing on internet-sourced tweets. In the scope of this study, the initial step involved gathering tweets from Twitter users that contained keywords pertaining to Digikala. Following the analysis of these tweets, an attempt was made to discern the patterns reflecting audience-customer engagement with the brand. To conclude, a time series chart of the content publishing process, time series and trend of emotions or sentiments pertaining to the content, keywords, and super hashtags, as well as the topic modeling of the data collected were illustrated. Additionally, the most prominent trends and topics observed in the engagement of Twitter users with the Digikala brand were pinpointed.

According to Avicennayan and Sadrayan's readings, despite all their differences, the "substance" is a quiddity that either exists outside without the subject, or if it exists in the subject, the subject also needs it for its existence. In contrast to " accident", it is a quiddity that is always found in a subject that does not need it. This division is based on the existence or non-existence of quiddities. Sheikh Ishraq's starting point for the discussion of truth is "I" and the awareness of "I", not existence. In this view, "I" is a self-emerging truth that has knowledge of itself, and knowledge of others is created by paying attention to others. Therefore, what attracts the attention of "I" in the first step of the emergence of objects is the conscience and self-discovery of objects.Then, in the second step, through the lens of intuition, the way things arise is brought to the attention of "I" in such a way that if the luminous facts, which are full of presence and light and perceive themselves, are found to be true to themselves and become conscience. They are "luminous substance" and if they are found to be existentially dependent on the other and conscience, they are "luminous accident". Also, on the other hand, if the facts that are found absent from themselves, are found and realized independently of others, they are called " dark substance " and if they are found and realized independent of others, they are called "dark accident".

Oilseed pumpkin is an introduced medicinal plant, the seeds as well as some other organs of which are being utilized in treating an array of human diseases in Iran. Considering the plant's significance in the health product's industry on the one hand, and the countrywide drought stresses and a lack of information on mineral nutrition of the oilseed pumpkin, the present study was aimed to study the impact of irrigation regime as well as N application on chlorophyll (Chl) content, gas exchange properties, proline content, yield and yield components of this useful medicinal plant. A 5-replicate split plot, randomized complete block experiment was conducted at the Lavark Research Farm, College of Agriculture, Isfahan University of Technology-Isfahan, Iran in 2009. Three irrigation regimes based on evaporation from a Class-A Standard Evaporation Pan including irrigation after 65 mm (I1=control), 95 mm (I2¬= moderate water deficit) and 130 mm (I3= severe water deficit) were assigned as the main plots. Three nitrogen (N) application rates including zero N (N1= control), 120 N (N2) and 220 N (N3) kg ha-1 of N as urea were chosen as subplots. Leaf Area Index (LAI), gas exchange attributes, Chl and proline content, fruits/plant, seeds/fruit, 1000-seed weight, fruit and seed yields, oil content as well as yield were evaluated. I1¬ and I3 irrigation levels with 2.11 and 1.46 and N3 and N1 nitrogen levels with 2.50 and 1.16 produced the highest and lowest LAI, respectively. Water deficit stress and lowered N application led to significant decreases in leaf Chl content. Water deficit led to decreases in the net photosynthetic rate (A) and leaf stomatal conductance (gs) but it led to increases in internal CO2 concentrations (Ci). While A and gs increased with N application rate, Ci decreased with an increase in N application. Proline content increased with both increases in water deficit stress and N application rate. I3 irrigation level led to 23, 33, 5, 51, 52 and 55 percent decreases in the traits of: fruits/plant, seeds/fruit, 1000-seed weight, seed and fruit yield as well as oil yield, respectively, as compared with the I1 level. N3 level of nitrogen application resulted in 28, 22, 27, 9 and 33 percent decreases in fruits/plant, fruit and seed yield, oil percent as well as oil yield, respectively, as compared with the N1 level. It could be concluded that the negative impact of water deficit stress on yield and its components in oilseed pumpkin is mainly through the decreases in the photosynthetic surfaces, photosynthetic rate and as well as Chl content. Furthermore, application of 220 kg ha-1 of N may lead to increases in LAI, Chl and A, though the latter increases, seemingly, enhance the growth of vegetative organs rather than the reproductive ones and grain yield components.

The present survey research was performed to determine different dimensions of change leaders’ competencies & behaviors as well as to scale the degree of the effect they have on their own performance. Statistical population for the study included all 395 managers and directors (chancellor, vices, deans, and heads of departments) of Islamic Azad University located in zone 8. Sample population was calculated 276 persons by use of Morgan Table through classified random sampling. The instrument to collect data was a self-designed questionnaire, including 42 items. Data collected were analyzed by use of measures such as mean, factor analysis and ANOVA. The findings show that characteristics of change leaders could be classified into three main areas as follows: features, competencies, and behaviors. The study also shows that university change leader's competencies and behaviors have little effect on their own performance, although a high degree of effect was presumed by the leaders. Yet they believe that a training of such skills as problem diagnosing, problem solving and universal orientation could greatly affect their behavior and therefore, would facilitate change implementation.