Analisa Perhitungan Beban Cooling Tower Pada Fluida Di Mesin Injeksi Plastik

Dalam penggunaan material plastik sebagai komponen dan spare part, dan di industri otomotif kini banyak menggunakan mesin pencetak palstik dalam pembuatan produk. Pada proses pencetakan plastik diperlukan pendinginan baik itu mesin dan juga cetakannya (mold) agar terhindar dari kerusakan atau deffect yang terjadi akibat suhu yang terlalu panas sehingga mengakibatkan terganggunya proses pencetakan. Salah satu proses pendinginannya adalah menggunakan sistem cooling tower sebagai alat dan air sebagai media fluidanya, yang berguna untuk menjaga dan menstabilkan suhu pada mold dan mesin. Dalam proses pendiginannya, Cooling Tower memiliki beban, effisiensi, penggunaan make-up water dan persentasinya, serta effek yang diakibatkan jika suhu mesin terlalu panas pada mold atau mesin. Pada analisa didapatkan suhu maksimal yang baik untuk cooling tower dari segi beban, effisiensi, make-up water, dan effek nya agar proses pencetakan dapat berjalan dengan baik. Effisiensi (%) yang baik untuk beban cooling tower pada analisa adalah suhu T1db 33°C kelembapan 80%, dan suhu T2db 36°C kelembapan 90%. Make-up water yang paling ekonomis pada cooling tower pada analisa dengan suhu T1db 33°C dan T2db 36°C dengan kelembapan 80%, dan 90%

Pengaruh Penilaian Kinerja Terhadap Prestasi Kerja Karyawan (Studi Pada Karyawan Bagian Produksi Cv.shuttlecock Nasional Kepanjen Malang)

These results indicate that simultaneously and partially on the performance of the production employees CV. National Shuttlecock significant effect on the dependent variable is the variable performance that can be seen from the value (sig) F <α ie 0.000 <0.05, and Adjusted R Square value shows the number of 34.636 which means that these variables accounted for 0.733 to variable performance . Partially, which can be seen from the results of t-test showed that the performance appraisal variables have a significance level of 0.000. Based on these calculations, it can be concluded that partial performance evaluation has a significant influence on employee performanc

The Differences of Consumer Behaviors Towards Merantau Student and Local Student

This study aims to determine consumptive behavior of late adolescents who migrated with non-migrants using the primary data of 347 people collected through the method of online questionnaires, ie with the help of google form. The subjects of this study have characteristics that are; 1) Merantau Students, 2) Local Student 3) have aged 18 to 22 years. Consumptive behavior measurement indicators were obtained according to Sumartono [11] The variables discussed are gender, length of time wander, pocket money, savings type and scholarship to consumptive behavior variable. The results of this study empirically found that consumptive behavior of adolescents or students who migrated and who did not migrate not only factors, places and shelter.     Keywords: Economic, Merantau, Consumptive behavior, Late Adolescence, Studen

Media Live Streaming Berbasis Raspberry Pi pada Perguruan Tinggi Raharja

Higher Education Prog is a university that focuses konsestrasi in the field of computer and technology, but in the field of penyampaikan information to students remains less efektik because they still use a paper or poster is attached to the wall magazine (Magazine Wall) and his appearance did not attract the students to see and listen information contained campus. The need for an innovation to renew methods penyampaikan user information into a digital form. The authors mebuat Broadcast media based information tool Raspberry Pi utilizing campus facilities like television to show some internal information campuses and as a forum to showcase the work of the Student Video Mavib to display to the Personal Prog

Humification Degree and Its Relationship with Some Soil Physical Characteristics on Robusta Coffee (Coffea Canephora) Plantation

Soil moisture stress in coffee plant impacts on the productivity of coffee fruit at PT. Perkebunan Nusantara XII, it is because the low ability of the soil to store water. The ability of the soil to store water can be increased by increasing the organic matter content of soil, especially humic substances. Soil organic matter plays an important role in the improvement of soil physical properties, especially the availability of soil moisture for plants. The purpose of this study was to analyze several humification parameters at four age of plantations plots of coffee and its relation to the water distribution potensial on Inceptisol PT. Perkebunan Nusantara XII Malang district. The research was conducted at PT. Perkebunan Nusantara XII were taken soil samples from 8, 28, 40, and 80 years old robusta coffee plots at 0-30 cm and 30-60 cm soil depth. The results showed that the increasing the age of the coffee plantations significantly increased the input of organic matter in the soil, with indicators of increased litter on soil surface, increased levels of soil C-organic and N-total, humic acid and soil pH. Increasing age of coffee plantations until 80 years did not affect to the value of humification parameters (C/N ratio, HA/FA ratio, E4/E6 ratio, and the humification rate (HR)). The age of coffee plantations affected the total acidity, carboxylic groups and phenolic OH, where the values tended to decrease with the older of coffee plantations in the 0-30 cm of soil layers and increased in 30-60 cm. Increasing age of coffee plantations improved the total pores and available water content in the 0-30 cm of soil layer

Development of Intersection Management Strategy Due to Opening of Sumatra Toll Road

The main role of a transportation network is providing optimum services for transportation network. Over the time, the population is increasing and the needs of reliable transportation network also increased. Transportation network consists of node and connector. According to the condition, the provision of reliable transportation network facilities should be able to optimize the node and the link. In the real condition, there’s a gap between the existing transportation network conditions with the optimum transportation network conditions, as a result the existing transportation network is not able to serve the transportation movement that occurred. Based on this information, research entitled Development of Intersection Management Strategy Due to Opening of Sumatra Toll Road. The objective of this study are: a) Generating traffic flow through the Simpang Polsek Sukarame, Bandar Lampung. b) Evaluating the traffic composition through Simpang Polsek Sukarame, Bandar Lampung. c) Evaluating services intersection parameters needed in evaluating the intersection. d) Determining the intersection strategy of intersection due to the opening of the Sumatra Toll Road. The study is conducted by using Macroscopic Modeling approach using PTV Vissum application and microscopic evaluation using MKJI 1997. In the research, there are several types of data needed. These data are classified into primary and secondary data. Primary data required include: a) Traffic Counting Data, TC Data implemented at Simpang Polsek Sukarame. Traffic Counting data is used as a database for the validation of the transportation model. b) Road geometry data is taken at all connector of Simpang Polsek Sukarame. The Geometry consist of the road width and shoulder width. Geometry data is used for capacity calculation, delay, and saturation degree. From the results of transport modelling that will be evaluated the service level of the intersection based on the parameters of degree of saturation, delay, and speed of vehicles through the intersection. The Result of the model shows that The queue length increasing from 10.66 m to 16.64 m or increasing for around 60% and the average delay increasing from 7 s to 13.43 s or increasing around 95%. It will be concluded that the addition of toll road traffic is affecting the intersection performance

The effect of thyroxine on silk gland and the effect of two thyroxine-treated mulberry species feeding on silk quality in the silkworm Bombyx mori (Lepidoptera: Bombycidae)

The influence of feeding mulberry leaves treated with thyroxine to the growth of the silk gland, and the effect of two different mulberry species, that is, Morus nigra and Morus multicaulis treated with thyroxine on silk quality in the silkworm were studied. The silk glands from thyroxine treated Bombyx mori larvae weighed heavier than control. The weight of the posterior silk gland, where fibroin is synthesized, increased significantly compared to the anterior and median silk glands. No difference between thyroxine treatment on the second instar and fourth instar larvae in terms of silk gland weight was observed. Different mulberry species treated with thyroxine fed to silkworm larvae, affected silk quality. Higher silk tenacity and elongation were observed when silkworm larvae were fed thyroxinetreated M. nigra, while silkworm larvae fed on thyroxine treated M. multicaulis produced longer unbreakable filament