The purposes of the research were (1) to study CAT Telecom Public Company Limited (CAT) staffs perception of organizational communication (2) to study CAT staffs’ efficiency of organizational communication (3) to study the comparison of the differences on personal aspect and efficiency of organizational communication (4) to study perception of organizational communication related to efficiency of organizational communication. The sample group was 380 samples who were CAT staffs all over the country. The questionnaires were distributed to the selected respondents in order to collect data. The statistical methods used to analyze data were frequency percentage mean standard deviation t-test One-way analysis of variance and Pearson product moment correlation coefficient. The results indicated the majority of female respondents for 60.26 percent. The bachelor’s degree or equivalence comprised 48.95 percent. There were experience group from 6-10 years was 28.68 percent and 70.26 percent of work in central location. The CAT staffs’ perception of organizational communication was in high level (xˉ=3.79). Considering each aspect found that all aspect were in high level included receiving message aspect (xˉ=3.80) interesting in message (xˉ=3.63) ability to remember the message (xˉ=3.71) and credibility of message (xˉ=3.99). The overview of efficiency of organizational communication of CAT was in high level (xˉ=3.70). Considering each aspect found that all aspect were in high level included sender (xˉ=3.72) message (xˉ=3.72) channel (xˉ=3.64) and receiver (xˉ=3.74). The result of the hypothesis found that: Personal aspect was the difference on education experience and work location had different efficiency of organizational communication with statistical significance at level .05 while different gender showed no differences of the efficiency of organizational communication. The perception of organizational communication was unrelated to the efficiency of organizational communication. xˉ=3.72) message (xˉ=3.72) channel (xˉ=3.64) and receiver (xˉ=3.74).

The purposes of the study were to investigate 1) the opinions towards internal organizational factors affecting organizational commitment of DENSO Tool & Die (Thailand) Co. Ltd. employees 2) the organizational commitment and 3) the influence of factors affecting the performance of DENSO Tool & Die (Thailand) Co. Ltd. Employees. The data were collected from the employees through a questionnaire used as the research tool on organizational factors affecting organizational commitment and analyzed through parameter value percentage mean score (μ) standard deviation (σ) Spearman rank Correlation Coefficient or Spearmans rho and stepwise regression. The findings revealed that the internal factors affecting the commitment of the employees working at DENSO Tool & Die (Thailand) Co. Ltd. were positively related at the .01 statistical significance.

This research was aimed to analyze work performance classified by personal information to investigate internal factors of support personnel work performance and influence of internal factors affecting work performance of the support personnel at Rajamangala University of Technology Phra Nakhon. The population used in this study was 693 staff working at Rajamangala University of Technology Phra Nakhon Bangkok. The sample size was determined by Craig and Morgan method to draw out 250 samples. The research instrument was a questionnaire constructed by the researcher to collect data manually. The data obtained from the questionnaire were analyzed using percentage mean standard deviation and T-test F-test ANOVA Pearson coefficient and multiple regression analysis. The research revealed the results as follows. Work performance of the support personnel of Rajamangala University of Technology Phra Nakhon in the overall was at high level with the mean Organization factors of the support personnel of Rajamangala University of Technology Phra Nakhon in the overall was at high level with the The results of the study on personal factors agreed with the overall performance of Rajamangala University of Technology Phra Nakhon personnel. It was found that the status salary and educationhours and working centers were significantly different .

The purposes of this research were to study attitudes towards work organizational atmosphere and relationship between attitudes towards work organizational atmosphere and work participation of the Government Lottery Office employees. The research sample consisted of 260 Government Lottery Office employees drawn from probability sampling and simple random sampling. The statistics used for data analysis were frequency percentage mean standard deviation and Pearson product moment correlation coefficient. The study results indicated that the Government Lottery Office employees’ attitude was at a high level. When considering each aspect it was found that attitude regarding work performance had the highest average value and work participation was also at high level. It was found that accepting assigned responsibilities had the highest average value. The results of the hypothesis testing revealed that in the overall the attitudes towards all aspects and the organizational atmosphere positively correlated with the Lottery Office employees’ work participation statistically significant at the 0.01 level.

The purpose of research is to study the carbon footprint evaluation of products for thread turned Tungsten Carbide 16ER60 of production. To assess amount of greenhouse gas emissions that affect the environment. The key component in the calculation include raw material production material energy and waste January 2018 and March 2019. The scope of the study is the assessment of Business-to-Business (B2B). From the assessment of the carbon footprint it was total of greenhouse gas was about 1.1559 Kg CO2e which was divided from raw material about 0.0118 Kg CO2e and production process about 1.1441 Kg CO2e. From the improvement reducing electricity of sintering furnaces machine and lighting system was reduce greenhouse gas emissions about 0.3249 Kg CO2e or decrease percent 71.88 CT