Preparation and characterisation of polyethylene-octene grafted maleic anhydride-toughened 70:30 PA6/PP/MMT nanocomposites

A series of nanocomposites consisting of a polyamide 6 (PA6) and polypropylene (PP) matrix (70:30) with a maleated polyethylene-octene elastomer (POEgMAH) and organophilic modified montmorillonite (MMT) were prepared by melt compounding in a co-rotating twin-screw extruder followed by injection moulding. The weight fraction of organoclay was adjusted from 2 - 10 wt% by increments of 2 wt% and the weight fraction of POEgMAH was fixed at 10 wt%. POEgMAH was used as an impact modifier as well as compatibiliser in the nanocomposites. Mechanical properties of the blends were investigated by tensile, flexural and impact testing. X-ray diffraction (XRD) was used to characterise the nanocomposites. The thermal properties were studied by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Addition of 4 wt% organoclay showed the highest tensile and flexural strengths for the blends. The Young's and flexural moduli were also improved with increasing the organoclay concentration but with a corresponding reduction in impact strength and elongation at break. XRD result revealed that the organoclay was dispersed uniformly (exfoliated) although the degree of exfoliation decreased with increasing organoclay content. The DSC analysis showed that the crystallinity of the blends decreased with increasing organoclay concentration. It was shown from the TGA analysis that the thermal stability of the PA6/PP nanocomposites was significantly improved in the presence of impermeable silicate layers in the blends

Modified effects of LDPE/EVA blends by electron beam irradiation

The effect of electron beam irradiation on the properties of low density polyethylene (LDPE, LH0075) and ethylene vinyl acetate (EVA, with 18 %VA) blends were investigated. The improvement of the measured gel content, stress at ultimate, strain at Auto breaks and transition temperatures (Tg, Tm) have confirmed the positive effects on blends but ineffective in density of blends

ANALISIS YURIDIS SOSIOLOGIS KEKERASAN DALAM RUMAH TANGGA (Study Kasus Di Desa Sumberpinang Mlandingan Kabupaten Situbondo)

ABSTRACT\ud Household violence was a social phenomena happened in each level of society, whether in higher economic class or lower economic class. Household violence happened because of gender and power imbalance which was believed by the society. Gender and power imbalance caused inharmony in household so that there needed a basic and continuous change. \ud In this research, the writer describe three statements of problems about juridical analysis violence in household and gender in Madura society. The writer discussed: (1) what the violence forms in household violence? (2) What cause household violence? (3) How the handling of household violence? \ud In this research, the writer used two data source: primary and secondary data. Primary data consisted of three respondents who were the victim of violence and one person as informer, the chief of village. Secondary data found through books, literature in theoretic way. Literature, internet article, etc. Method used was qualitative descriptive with case study approach. Data collection technique used interview and observation, then the data analyzed by descriptive qualitative analysis. By describe the research subject or object according to the facts in order to give description and conclusion about juridical analysis violence in household and gender in Madura society. \ud From the research there found various violence in household happened to respondents. In this research was physical violence like hit, slap, hair-pulling. The psychic violence like insulting, isolation, sexual violence like unusual sex, economic violence like ignore his wife in economic. The root was individual factor, social-economic factor, social-culture and religion factor. The handling was done by non-litigation (discussion) which often involved third parties as mediator\u

Toughening polyamide 6 nanocomposites with maleic anhydride grafted polyethylene octene

Rubber toughened nanocomposites consisting of ternary blends of polyamide 6 (PA 6), maleic anhydride grafted polyethylene octene (POEgMAH) and organoclay montmorillonite (MMT) were prepared by melt compounding followed by injection moulding. The organoclay content was kept constant at 4 wt% while the POEgMAH content was varied between 5 to 20 wt%. The mechanical properties were studied through tensile, flexural and impact properties. The scanning electron microscope (SEM) and X-ray diffraction (XRD) were used to examine the morphology of the nanocomposties. The results showed that, the incorporation of 4 wt% organoclay significantly increased the stiffness and strength but at the expense of the toughness. Izod impact measurement indicated that the addition of POEgMAH led to a significant improvement in the impact strength of the nanocomposites. X-ray diffraction analysis (XRD) revealed that an intercalation organoclay silicate layer structure was formed in rubber-toughened PA6 nanocomposites. SEM study revealed a two-phase morphology where POE, as droplets was dispersed finely and uniformly in the PA6 matrix

Three fingers precision grasping operation of 3D printed multi-fingered hand

There is an increasing number of people with traumatic injury related to hand amputations. The amputees experience many problems, especially dealing with activities of daily living (ADLs). Hence, the prosthetic hand is designed to help amputees to perform daily activities. Customized prosthetic hand with high performance is very costly and use heavy DC motors for actuation. This paper presents a low-cost prosthetic hand, which uses a 3D printing technology and simple actuator system. Hand model with three active digits; thumb, index and middle fingers are developed. The hand is controlled by Arduino microcontroller and DC servo motor in pulling tendon performing grasping operation. It was instrumented with FlexiForce sensors to monitor the grasping force formed by each finger. The performance of the hand is tested for the three fingers precision grasping operation using cylindrical object. The data presented is the maximum force for three fingers precision grasping operation using 3D printed hand

Development of the low cost 3D printed robotic hand controlled by 8 bits microcontroller

Prosthetics hand robot is the artificial hand that resembles the actual human's hand. This artificial hand is placed onto the amputees hand that will allow them to do the basic hand movement and to make their daily life easier. In order to perform the basic hand movement, degree of freedoms (DOFs) must be considered. DOF also known as joint which is the movement that are produced. DOF is located at each of interphalangeal of the finger and is named as Distal, Proximal and Palmar. There are five fingers that are named as index finger, middle finger, ring finger, baby finger and thumb. Note that, the thumb only have two types of interphalangeal such as distal and proximal while other fingers have one extra interphalangeals that is known as palmar. The difference between finger mechanism of this robot compared to finger mechanism that use the fishing line is fast movement response and high durability. An actuator is used to produce the movement of each fingers that is called as SG90 TowerPro mini servo and it is controlled by Arduino microcontroller. The robot structure is designed by using Autodesk Inventor Professional software and will be downloaded into the 3D printer part by part for the fabrication process. The size of the robot structure is the average size of the actual human hand and the material of the structure is known as Acrylonitrile Butadiene Styrene (ABS) plastic which is lightweight and is safe to be used for the prosthetic hand purpose. The power supply of the system is 3.7V rechargeable batteries (two units connected in series) and its voltage is regulated and is step down into 5V by using buck dc-dc converter before it is supplied to the microcontroller and servo motor. Result that illustrated the movement of the fingers is produced by sending the expected analog signals to the servo motors. As the servo motor shaft is connected to the finger mechanism, the finger will produce the movement. Thus, the results of this study is to propose a structure and the system design of the robotic hand that can be used as prosthetics hand robot for the amputees

Thermal and mechanical properties of ultrahigh molecular weight polyethylene/high-density polyethylene/polyethylene glycol blends.

Blends of ultrahigh molecular weight polyethylene (UHMWPE) with high-density polyethylene (HDPE) provide adequate mechanical properties for biomedical application. In this study, the mechanical and thermal properties of UHMWPE/HDPE blends with the addition of polyethylene glycol (PEG) prepared via single-screw extruder nanomixer were investigated. The UHMWPE/HDPE blends exhibit a gradual increase in strength, modulus, and impact strength over pure polymers, suggesting synergism in the polymer blends. The elastic and flexural modulus was increased at the expense of tensile, flexural, and impact strength for the blends containing PEG. The degradation temperature of UHMWPE was improved with the incorporation of HDPE due to good thermal stability of HDPE. HDPE improved the dispersibility of PEG in matrix, consequently reduced the surface area available for the kinetic effects, and reduced the degradation temperature. The morphology analysis confirmed the miscibility between UHMWPE and HDPE and the changes in polymer structure with the presence of PEG modify the thermal behavior of the blends. The mechanical properties of the blends that are underlying values for the design of implant material show the potential used as biomedical devices

LAPORAN INDIVIDU PRAKTIK PENGAJARAN LAPANGAN (PPL) SEMESTER KHUSUS TAHUN 2015/2016 SD NEGERI KARANGJATI, PLOSOKUNING, MINOMARTANI KECAMATAN NGAGLIK, KABUPATEN SLEMAN DAERAH ISTIMEWA YOGYAKARTA

Kegiatan Praktik Pengalaman Lapangan (PPL) merupakan program yang terintegrasi untuk mengembangkan kompetensi mahasiswa program pendidikan sebagai calon guru atau tenaga kependidikan. Dalam pelaksanaan PPL, mahasiswa melaksanakan tugas-tugas kependidikan, dalam hal ini guru atau tenaga pendidik yang meliputi kegiatan praktik mengajar, dan kegiatan non kependidikan. Program PPL ini meliputi pelaksanaan praktik mengajar terbimbing sebanyak 4 kali yang dilaksanakan pada tanggal 18, 26, 31 Agustus 2015 dan 2 September 2015 dan ujian praktik mengajari sebanyak 2 kali yang dilaksanakan tanggal 4 dan 10 September 2015. Praktik mengajar terbimbing dan ujian praktik ini meliputi pembuatan rencana pelaksanaan pembelajaran, persiapan dan pembuatan media, pelaksanaan pembelajaran, dan evaluasi pembelajaran. Pelaksanaan kegiatan PPL meliputi tiga tahapan yaitu, tahap persiapan, pelaksanaan dan analisis hasil. Tahapan persiapan PPL meliputi Micro Teaching, pembekalan PPL, observasi sekolah, mengumpulkan materi ajar, mempelajari silabus dan menyusun RPP. Tahap pelaksanaan meliputi praktik mengajar terbimbing dan ujian mengajar. Tahap analisis hasil berisi hasil, hambatan, solusi, dan refleksi. Pada pelaksanaan program PPL di SD Negeri Karangjati berjalan dengan baik. Meskipun terdapat beberapa kendala yang dihadapi, semua mampu teratasi berkat kerjasama yang baik antara mahasiswa PPL dan pihak sekolah. Dukungan dari berbagai pihak terutama pihak sekolah sendiri sangat membantu kelancaran pelaksanaan program PPL di sekolah tersebut. Setelah kegiatan PPL selesai, praktikan mendapatkan pemahaman bahwa menjadi seorang guru bukanlah pekerjaan yang mudah apalagi menjadi seorang guru S

Pembuatan Model Customer Relationship Management (CRM) Bidang Perindustrian (Studi Kasus Dinas Perindustrian Perdagangan Koperasi dan UKM Provinsi DIY)

Dinas Perindagkop merupakan salah satu bidang unggulan Pemda DIY yang telah menerapkan Blueprint IT DIY (Jogja Cyber Province). Salah satu bidang di Disperindagkop yaitu Bidang Perindustrian, bidang tersebut memiliki kendala yaitu terbatasnya SDM dan kurangnya penguasaan dan pemanfaatan teknologi, Pelayanan yang dilakukan Dinas dalam melayani pelaku industri saat ini menggunakan caraofflinedatang langsung ke dinas dan mengisi formulir buku tamu, Sistem informasi Dinas hanya sebatas sistem informasi untuk membantu menyelesaikan pekerjaan dan tidak memberikan informasi untuk customer. Pihak Dinas terutama Bidang Perindustrianbelummemilikirancangan yang jelas untuk membangun sistem CRM. Subyek padapenelitian ini adalah “Pembuatan Model CRM di Bidang PerindustrianDisperindagkop DIYâ€. Tahapan Penelitian ini antara lain analisis yaitu analisis saa tini, Perhitungan Cobit 4.1, analisis kondisi yang diharapkan, analisis GAP, pembuatan model CRM, uji kelayakan dan Rekomendasi. Hasil dari penelitian iniberupa“Kerangka Model CRM di Bidang Perindustrian Disperindagkop DIY.Dan hasil uji kelayakan model menunjukkan 100% sesuai, sehingga dengan persentase tersebut nantinya dapat digunakan sebagai acuan dalam pemetaan CRM dan panduan terhadap tim management dalam perencanaan aplikasi