SISTEM PENYIRAMAN RUMPUT DI BUKIT VITKA EDUCITY SECARA OTOMATIS

Bukit Vitka Educity terletak secara terintegrasi dengan Kampus Institut Teknologi Batam dan Politeknik Pariwisata Batam dalam komplek Tiban Ayu, dimana kawasan ini menjadi tujuan wisata masyarakat sekitar untuk melihat matahari terbenam. Pada bukit ini ditanami rumput gajah untuk menambah keindahan, dengan permasalahan bahwa tanaman ini memerlukan kelembaban tanah yang tinggi karena akarnya yang hanya berjarak beberapa centimeter dari permukaan tanah. Oleh sebab itu, untuk membantu menjaga kelembaban tanah pada bukit Vitka Educity, pengabdian kepada masyarakat ini menawarkan rancangan “Sistem Penyiraman Rumput Di Bukit Vitka Educity Secara Otomatis”

Effect of various concentrations of sodium hydroxide/hot alkali treatment on the physical properties of ramie fibres

The preparation stages that precede the final treatment with a chemical treatment like alkali determine the physical characteristics of ramie fibres. It modified the hydroxyl group which is responsible for the hydrogen bonding of the fibres. This work examined the pre-treatment of ramie fibres with acetone followed by alkali or hot alkali with various concentrations. The immersion of ramie fibres in certain percentages of sodium hydroxide solution resulted in a good performance of their physical characteristics. The ramie fibres treated with 10% NaOH exhibit the best dispersion stability and low agglomeration or precipitation in water with an amount of 14%. When alkali is applied to ramie fibres, the hydrophilic group on their surface grows, potentially improving the fibre's capacity to absorb water. However, when the concentration is increased to 15%, the dispersion stability of sodium hydroxide performs less well. The fibres' ability to absorb water was diminished and they became brittle due to a high alkali content. In addition to the aforementioned characteristics, the properties of precipitation and water absorption were unaffected by the hot alkaline process for all samples. The hot alkali process (80°C) was not able to generate a further breakdown of hydrogen bonds of the fibres

Layang-layang Terakhir

vi + 407 hlm.; 19 cm

SISTEM KELISTRIKAN BERBASIS SOLAR PANEL UNTUK RUMAH NELAYAN TRADISIONAL

Limitations and the absence of electricity will disrupt the continuity of people activities. This is because electricity is one of the needs of the people and is felt to be very important. The availability of electricity, which is supported by power plants sourced from fossil fuels, certainly burdens the lower middle class community, including the fishing community. The solution that can be implemented to reduce the burden and dependence of the community on fossil fuels as a source of electrical energy is the use of solar energy. Indonesia has good potential when using solar energy as an alternative energy for power generation. This is because Indonesia is a tropical country that has abundant solar energy potential. Thus, this abundant solar resource is expected to meet household-scale electricity needs in remote areas that have not been reached by the State Electricity Company (PLN). PLTS in this service is carried out to meet electricity needs independently in residential homes that will be used day and night. The type of residential house used is a simple house type, with a total daily electrical power requirement of 1.314Wh and added 20% so that the total need is 1,576.8 Wh

Analysis of Coir Fiber/Wood Paint as Composite Anti-Weathering Coatings on Traditional Fishing Boats

The low resistance of wood as a frame material for traditional fishing boats against splashing sea water, humidity, and high-temperature fluctuations was studied in this study by adding coconut coir fiber to wood paint, where this mixture will become an anti-weathering composite material. To make compatibility between the fibers from coir which are water-absorbing (hydrophilic) and alkyd paints which are water-repellent (hydrophobic), the author gives special treatment to the coco fibers through an acetone pre-treatment process and hot alkali (hot alkali treatment) by soaking fiber in 10% high-temperature sodium hydroxide NaOH solution. Soaking in this solution is able to modify fibers that have a rough surface and reduce hydrogen bonding thereby improving the interfacial bond between the fiber and the filler in the composite. The results obtained were that the addition of fiber with a weight fraction of 3.40% to the alkyd paint matrix made the composite the most optimal anti-weathering coating