The oil palm trunk (OPT) particle was used as a filler for the manufacture of rigid polyurethane foam composites (RPUFC). The purpose of this research is to investigate the effect of OPT particle content and variation of composite density on the physical and mechanical properties of RPUFC. The RPUFC was created with five different volume fractions of OPT particles (0, 2.5, 5, 7.5, 10 wt%) and three different composite densities (40, 50, 60 kg/m3). The OPT particles, polyols, and isocyanate were mixed, poured and formed in a closed mold. The moisture content (MC), water absorption (WA), compressive strength (CS), screw withdrawal (SW), and internal bonding strength (IB) properties were determined according to JIS A 5908-2003. The flexural strength (FS) properties were determined according to ASTM D790. The physical properties (MC, WA) were increased with increasing OPT particles in the RPUFC. The RPUFC with 2.5% OPT particle was higher in modulus of rupture, modulus of young and CS values compared to RPUFC control. The IB and SW values were increased when 2.5% OPT particles were added to RPUFC. The best PURFCs were produced with the addition of 2.5% particles at a density of 50 and 60 kg/m3.

Employability Skills is a skill requirement that must be possessed by someone to be able to get a job, always keep spirit on work for the successful career achievement. The aim of this study is to find a specific employability skills framework model for Machine Operators. The research design uses mixed methods, which combines quantitative and qualitative methods and parallel convergent strategies in the mixing process data. These findings produce 14 Employability Skills framework, such as; 1) Basic skills: communication, listening 2) Personal Qualities: presence, teamwork, responsibility, honesty, flexibility, empathy. 3) Thinking Skills: creative, problem solving 4) Management: self-management, planning management 5) Systems and Technology: Understand the concept of work, and production flow systems. Overall, the industry are focusing on the basic skills as a primary obligation and personal quality for employability. Further thinking skills, management, and systems and technology will be developed in the workplace later.

3D Printing merupakan salah satu terobosan bidang manufaktur khususnya teknik additive manufacturing, yang proses menjadikan dalam file digital menjadi suatu objek padat 3 dimensi berdasarkan susunan lapisan (layer) bahan. Tujuan penelitian ini adalah merancang mesin 3D Printing dengan model siste cartesian dan pengujian sistem menggunakan aplikasi repitier host. Penlitian menggunakan jenis penelitian Design-Based-Research (DBR).  Hasil penelitian di jabarkan sebagai berikut; (1) proses perancangan desain mesin 3D printing didapatkan hasil area kerja panjang 30 cm lebar 30 cm dan tinggi 30 cm, sehingga dari rencana area kerja tersebut bisa ditentukan komponen mekanis, komponen rangka utama dan komponen pelengkap lainya. (2) Software repitier host dapat digunakan sebagai simulasi model cartesian. Repitier dapat digunakan cocok digunakan menggunakan bahan dari Polilactid Acid (PLA) dan hasil warna yang lebih sempurna dan beragam. (3) Pada hasil pengujian terdapat stringing pada hasil simulasi produk, hal ini disebabkan karena pengaturan retraksi dan suhu temperatur yang tinggi

Tujuan penelitian ini melakukan friction welding pipa (Fe), (Al), dan (Fe-Al) dengan mesin bubut. Metode penelitian ini adalah eksperimen, dengan penyambungan spesimen pipa silinder dengan bantuan mesin bubut. Proses pengujian hasil sambungan menggunakan Destructive Test yaitu uji tarik dan Non-Destructive Test yaitu liquid penterant untuk mengetahui cacat porositas. Hasil penelitian menunjukkan teknik friction welding serta direct drive welding bisa digunakan dalam proses penyambungan pipa (Fe) dan penyambungan pipa (Al). Pada penyambungan logam tak sejenis yakni antara pipa (Fe) dan pipa (Al) tidak dapat menghasilkan ikatan sambungan karena perbedaan titik leleh material dan tingkat kekerasan material.  Suhu sangat berpengaruh terhadap sambungan, hasil sambungan lasan yang baik dapat dicapai dengan meningkatkan temperature pengelasan pada saat proses pengerjaan. Cacat porositas terjadi karena butiran tidak menghasilkan fusi sehingga logam tidak bersatu menyeluruh, hal ini disebabkan temperature tidak mencapai yang dibutuhkan. Temperature yang tinggi dapat dihasilkan dari RPM yang semakin tinggi serta lamanya waktu benda bergesekan. Sehingga benda kerja yang dihasilkan memiliki nilai uji tarik yang baik dan cacat porositas dapat direduksi. The purpose of this research is to perform pipe friction welding (Fe), (Al), and (Fe-Al) with a lathe. This research method is experimental, by connecting the specimen cylinder pipe with the help of a lathe. The process of testing the connection results using the Destructive Test, namely the tensile test and the Non-Destructive Test, namely the liquid penterant to determine porosity defects. The results showed that friction welding techniques and direct drive welding can be used in the process of connecting pipe (Fe) and pipe joining (Al). In non-similar metal joints, namely between pipe (Fe) and pipe (Al), it cannot produce connection bonds due to differences in the melting point of the material and the level of material hardness. Temperature greatly affects the joint, good weld joint results can be achieved by increasing the welding temperature during the working process. Porosity defects occur because the grains do not produce fusion so that the metal does not come together completely, this is because the temperature does not reach the required temperature. A high temperature can be generated from a higher RPM and the length of time the object rubs. So that the resulting workpiece has a good tensile test value and the porosity defects can be reduced.

Environmental damage and depletion of fossil fuels trigger the development of biomass conversion technology to produce environmentally friendly fuels. One of them, biomass conversion technology is vacuum pressure biomass gasification technology. Previous research has succeeded in converting biomass energy into electricity, but the results are still not effective. In this regard, the effectiveness of the gasification system needs to be improved in this research. The combination of dry biomass and soaked biomass, as well as the combination of suction pump rotation at 1400 and - 2800 rpm, is the focus of this study. Based on the experimental results, the larger the motor rotation, the higher the vacuum pressure. The soaked biomass is more stable in maintaining the level of the amount of biomass in the reactor and the reactor is never overflowing. The combination of 2800 rpm rotation with drenched biomass can maintain the reactor temperature maintained at 800-1000 °C, the most stable and highest evaporation rate is around 23.0 x 10-4 kg/s, and produces the highest heat rate of 5.19 kilowatts. Based on this, the combination of soaking biomass with a rotation of 2800 rpm produces the best effectiveness.