Air pollution is one of the factors that can cause the decreasing of air quality in urban areas, especially in areas close to the industry. The government made a policy for the industrial sector to conduct the emission quality measurements in their operating chimneys. Commonly, the quality of emissions from the chimney sampling point is still above the permissible threshold. This condition occurs due to the lack of uniform emission flow near the sampling point. Based on the EPA method, the exhausted gas flow condition near the sampling point must have uniform velocity and small helicity. Therefore in this study the author tried to modify the channel in the chimney by installing a flow straightener (FS) in order to reduce helicity and the degree of uniformity of the flow. The upward 45° FS was chosen. For further research, position of flow straightener at a chimney vertical distance was set at 0.75D, 1D and 1.25D from lower disturbance. Based on the computational results, the best KV value of 32.32% with FS 1.25 D and KV value of 35.52% with 0.75 D were obtained. The closer to the sampling point, the KV value will improve. This result indicated that the accuracy of measurement of emission quality at the sampling point can be improved.
One of the analytical approaches that has been widely implemented in regional development planning is input-output (I-O) analysis. I-O analysis, based on an I-O table, can provide the basis for sectoral development planning by simulating the impact of policy scenarios. One area that has published Table I-O is Temanggung Regency, to represent its 2016 economy. Community Service Activities (PKM) aims to provide training and technical assistance to Temanggung Regency planners in using I-O analysis to design regional development planning documents. The results of this activity show that the participants technically understood and were able to analyze with Input-Output. Assistance was also carried out after the participants were able to use and analyze the Temanggung Regency I-O Table, and subsequently could become one source of information in the preparation of strategic development policies and programs.
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