The pattern of knowledge sharing in organization with social interaction approach: A case study in the Research Department of National Iranian Oil Engineering and Construction Company

The aim of this study was to provide the pattern of knowledge sharing in organization with social interaction approach. This is an applied, and descriptive-correlational research. The population consisted of senior experts and executive managers of the research department of national Iranian oil engineering and Construction Company. Thirty subjects were selected purposefully who directly involved in the project of knowledge sharing in organization. For data collection, the questionnaire and for data analysis the regression and structural equation modeling were used. The findings indicated that knowledge sharing activities, including sender, recipient, organizational context, and knowledge sharing mechanisms have a significant positive correlation with the function of knowledge sharing; furthermore, the co-existence of knowledge sharing dimensions and their suitability facilitate knowledge sharing in organization. Finally, knowledge sharing is the culture of knowledge-based interactions and appropriate approach for knowledge sharing refers to social interaction approach

The pattern of knowledge sharing in organization with social interaction approach: A case study in the Research Department of National Iranian Oil Engineering and Construction Company

The aim of this study was to provide the pattern of knowledge sharing in organization with social interaction approach. This is an applied, and descriptive-correlational research. The population consisted of senior experts and executive managers of the research department of national Iranian oil engineering and Construction Company. Thirty subjects were selected purposefully who directly involved in the project of knowledge sharing in organization. For data collection, the questionnaire and for data analysis the regression and structural equation modeling were used. The findings indicated that knowledge sharing activities, including sender, recipient, organizational context, and knowledge sharing mechanisms have a significant positive correlation with the function of knowledge sharing; furthermore, the co-existence of knowledge sharing dimensions and their suitability facilitate knowledge sharing in organization. Finally, knowledge sharing is the culture of knowledge-based interactions and appropriate approach for knowledge sharing refers to social interaction approach

Developing a Framework for Evaluating the Digital Platform Economy

The current digital revolution has given rise to a new organizational form, the Platform company. Today, the most valuable companies in the world and the first ones with a market value of more than a trillion dollars are platform companies. The Platform Economy is developing at an exponential rate and has become a top priority for governments across the world.The present study aims to provide a framework for evaluating the Digital Platform Economy at the international level. Utilizing a systematic review and meta-synthesis approach, the Platform Economy dimensions are identified as Digital Users, Digital Entrepreneurs, Digital Platforms, Digital Infrastructure, Innovation Capacity, and Institutional Environment and by extracting relevant indicators from international reports, the Platform Economy Composite Index is developed.Using the Partial Least Squares-Path Modelling (PLS-PM) method and specifically the Higher-Order Construct model, the measurement model is validated, and by employing a non-compensatory aggregation method, the Platform Economy Composite Index ranks 128 countries. The study is concluded by scrutinizing Iran’s current status regarding the enabling factors of the platform economy and identifying its strengths and weaknesses and providing recommendations for improvement. The results indicate that although Iran’s current status in terms of demand-side enablers is relatively good, it faces serious issues in terms of supply-side enablers

Study on physico-chemical characteristics of water in the southern of Caspian Sea

In this study, the characteristics of physico-chemical parameters of water done in coastal part of the southern Caspian Sea during 2010-2011 (four seasons) in 8 transects (Astara, Anzali, Sefidrour, Tonkabon, Noshahr, Babolsar, Amirabad and Torkman). For measurement of water quality parameters, 480 samples were collected in different water layers by using of APHA standards methods. According to modeling and statistical methods was used multivariate for evaluation of factor analysis (MFA) in general groups and discriminant analysis (MDA) for spatial and temporal with water quality parameters. The statistical procedure of MFA was used for data reduction and finally six factors selected with about 80.48 percent of total variances related to them. The statistical procedures of MDA were used for the role of spatial and temporal of water quality parameters in different water layer. The function one gave eight parameters (pH, salinity, EC, DO, NO^3-, water temperature, NH^4+ and N^-total) affording more than 80, 67, 80, 77 and 71 % correct assignations (return to the same transects) in spatial analysis. In all transects during four seasons, function one gave five parameters (water temperature, salinity, EC, NO^2- and NH^4+) to afford 100, 100, 100, 97 and 97 % correct assignations in temporal analysis. The results showed that, the average amounts in light penetration layers during four seasons were for EC(15.04±0.18ms/cm), pH(8.38±0.01unit), salinity (10.31±0.16g/l), DO(5.67±0.09ml/l) and water temperature (18.28 ±0.72°C). The average amount of nutrients for parameters such as organic and inorganic phosphorus, total phosphorus, NO^2-, NO^3-, NH^4+, N^-Total and SiO_2 were 0.50±0.02, 0.32±0.01, 0.82±0.02, 1.76±0.10, 0.10±0.01, 1.51±0.10, 46.82±1.80 and 8.60±0.29µM, respectively. The average amounts in dark layers during four seasons were for EC (15.46±0.38ms/cm), pH (8.34±0.03unit), salinity (10.70±0.35g/l), DO (4.55±0.13ml/l) and water temperature (9.62 ±0.16°C). The average amount of nutrients for parameters such as organic and inorganic phosphorus, total phosphorus, NO^2-, NO^3-, NH^4+, N^-Total and SiO_2 were 0.54 ±0.05, 0.33 ±0.02, 0.87±0.06, 1.92±0.21 , 0.08± 0.01, 1.55±0.25, 45.10±3.25 and 10.05±0.62 µM, respectively. The average amounts of light penetration in all transects during four seasons 4.49±0.38 meters. The maximum light penetrations during spring, summer, fall and winter seasons were 9, 8, 8.20 and 7 meters, respectively. The maximum water temperatures in light and dark layers were 32.36 and 11.50°C. Also, the maximum differences about thermocline temperature during summer and fall seasons were 19.6°C and 10°C, respectively in southern part of Caspian Sea. Data in spatial analysis were not significant (p>0.05), it means if add or removed any transect did not change occurred. But in temporal analysis were significant (p<0.01), and it means no way remove any seasons for a research work on Caspian Sea in southern part. In those transects with 100m depth. Water temperature is only highly effective parameter between other parameters. In function 1 between 3 functions in transects with 100m depth water temperature with 60% variance was the main role and effective between different seasons in depth part were very high

A Novel N-Doped Nanoporous Bio-Graphene Synthesized from Pistacia lentiscus Gum and Its Nanocomposite with WO3 Nanoparticles: Visible-Light-Driven Photocatalytic Activity

This paper reports the synthesis of a new nitrogen-doped porous bio-graphene (NPBG) with a specific biomorphic structure, using Pistacia lentiscus as a natural carbon source containing nitrogen that also acts as a bio-template. The obtained NPBG demonstrated the unique feature of doped nitrogen with a 3D nanoporous structure. Next, a WO3/N-doped porous bio-graphene nanocomposite (WO3/NPBG-NC) was synthesized, and the products were characterized using XPS, SEM, TEM, FT-IR, EDX, XRD, and Raman analyses. The presence of nitrogen doped in the structure of the bio-graphene (BG) was confirmed to be pyridinic-N and pyrrolic-N with N1 peaks at 398.3 eV and 400.5 eV, respectively. The photocatalytic degradation of the anionic azo dyes and drugs was investigated, and the results indicated that the obtained NPBG with a high surface area (151.98 m2/g), unique electronic properties, and modified surface improved the adsorption and photocatalytic properties in combination with WO3 nanoparticles (WO3-NPs) as an effective visible-light-driven photocatalyst. The synthesized WO3/NPBG-NC with a surface area of 226.92 m2/g displayed lower bandgap and higher electron transfer compared with blank WO3-NPs, leading to an increase in the photocatalytic performance through the enhancement of the separation of charge and a reduction in the recombination rate. At the optimum conditions of 0.015 g of the nanocomposite, a contact time of 15 min, and 100 mg/L of dyes, the removal percentages were 100%, 99.8%, and 98% for methyl red (MR), Congo red (CR), and methyl orange (MO), respectively. In the case of the drugs, 99% and 87% of tetracycline and acetaminophen, respectively, at a concentration of 10 mg/L, were removed after 20 min

Effect of filler material and foaming agent on practical properties of wood plastic composites

In this study, feasibility of foaming wood plastic composites using injection molding process was investigated. The effect of lignocellulosic raw material (Poplar saw dust and soybean straw flour) on the properties of composites was examined. Wood plastic composite boards with 3.2 mm thickness, 105 mm width and 105 mm length were prepared using high density polyethylene granules.  The foaming agent (Azodicarbonamide) at 2 wt % was also used. The scanning electron microscope micrographs confirmed that foaming process has been successfully carried out. The Results showed that all mechanical properties (except the impact strength) decreased while water absorption increased as the microcellular foaming method was used. Adding soybean straw flour to the foam structure led to​​ the decrease in flexural strength, flexural modulus of elasticity and tensile strength. Water absorption and thickness swelling were negatively affected with the addition of soybean straw flour