Studi Eksploratif Mengenai YOGYAKARTA sebagai Pengirim Wisatawan Keluarga

Family recreation is becoming more popular among families in Yogyakarta. This phenomenon is associated with an increased understanding of the importance of family togetherness, strengthen family ties and family memories. The practice of family recreation is affected by geographic, demographic changes, and understanding of the importance of tourism for the family. The purpose of this study is to explain the tendency of families\u27s understanding of family recreation and trend of family recreation. The findings suggest that family recreation associated with increased understanding and mobility of families. This study contributes to an understanding of the social changes in Yogyakarta families and its meaning for the tourism industry in the future

PENGARUH LIMBAH LAUNDRY TERHADAP KUALITAS AIRTANAH DI SEBAGIAN WILAYAH DESA SINDUADI, KECAMATAN MLATI, SLEMAN, DAERAH ISTIMEWA YOGYAKARTA

Pertumbuhan penduduk Desa Sinduadi mengalami peningkatan setiap tahun. Desa Sinduadi juga berdekatan dengan beberapa Perguruan Tinggi. Adanya perguruan tinggi menyebabkan banyak kos-kosan di Desa Sinduadi. Usaha laundry juga semakin banyak ditemukan di Desa Sinduadi. Semakin banyak usaha laundry maka limbah yang dihasilkan juga akan semakin banyak. Limbah laundry yang semakin banyak berpotensi mencemari lingkungan baik airtanah maupun air permukaan.Tujuan penelitian ini adalah mengetahui pengaruh limbah laundry terhadap kualitas airtanah di Desa Sinduadi. Teknik analisis yang digunakan adalah analisis laboratorium, keruangan, dan grafis dengan membuat peta dan grafik hasil pengukuran kualitas airtanah.Hasil penelitian menunjukkan bahwa limbah laundry berpengaruh terhadap kualitas airtanah khususnya parameter kimia seperti fosfat dan pH. Rata-rata kadar fosfat dan ph airtanah di daerah penelitian berturut-turut adalah 0,51 mg/L dan 5,93, sedangkan baku mutu air kelas I sesuai dengan PP DIY No.2 Tahun 2008 parameter fosfat dan pH berturut-turut adalah 0,2 mg/L dan 6 – 9

Feasibility of optimising bicycle helmet design safety through the use of additive manufactured TPE cellular structures

© 2015, Springer-Verlag London. Bicycle helmets are designed to attenuate forces and accelerations experienced by the head during cycling accidents. An essential element of bicycle helmet design is, therefore, the appropriate manufacturing of energy-dissipating components. The focus of this study was to evaluate the feasibility of using thermoplastic elastomer (TPE) cellular structures (Duraform® Flex), manufactured via a laser sintering (LS) process, as the energy-dissipating inner liner of the bicycle helmet. This study is presented in two sections; the optimisation of the LS process capabilities for the manufacture of cellular structures and an evaluation of the effects of cellular structure density on helmet impact kinematics. Through the fabrication and testing of tensile and compressive specimens, each process parameter (laser power, scanning exposure, build temperature and part orientation) was optimised to maximise compressive strength. The energy-dissipating characteristics of helmet cellular structures, made from this optimised material, were evaluated during simulated helmeted headform impact tests. Reduced accelerations and increased pulse durations were reported for decreased structural densities, demonstrating improved energy-dissipating characteristics for this novel technique. This study demonstrates that cellular structure-based inner liners, manufactured via additive manufacturing processes, have exciting potential towards improving bicycle helmet safety

Functionally graded additive manufacturing to achieve functionality specifications of osteochondral scaffolds

Osteoarthritis (OA) is a degenerative joint disease, characterized by cartilage loss and changes in bone at the interface of a joint resulting in pain, stiffness and reduced mobility. OA is one of the most prevalent chronic conditions as identified in Bone and Joint Decade. According to the World Health Organization, 40% of people over the age of 70 have OA. This joint disease affects around 0.4 billion people with patients in Europe accounting for up to 30%. The figure is set to increase with the ageing problem. Current non-surgical treatments for OA involve non-steroidal anti-inflammatory drug administration. Surgical treatments include osteotomy, abrasion arthroplasty, micro-fracture and autologous chondrocyte implantation (ACI). This is a two-stage surgical procedure with the associate costs and infection being the main concern. For small osteochondral defects, micro-fracture (MF) marrow stimulation and for large cartilaginous defects the autologous chondrocyte implantation are considered as necessary treatments. However, MF produces fibrocartilage not native hyaline cartilage. For defects that have progressed to a stage that affects the subchondral bone, other treatments are no longer effective and joint replacement operation is the only alternative. The demand for innovative therapeutic alternatives for complete healing of OA is significant. The treatment of cartilage and osteochondral (OC) defects remains a challenge since treatments so far have failed to achieve complete restoration of the properties of joint cartilage. Many new technologies, such as osteochondral tissue engineering, have been studied and applied to repair osteochondral defects. Commercially available osteochondral scaffolds have been used in patients with OC defects. However, no products have so far demonstrated to provide biomechanical properties suitable to promote the durable regeneration of large OC defects [1]. The main issue with these commercially available OC scaffolds is poor cartilage fill associated with fibrocartilage formation. The aim of this paper is to define the functionality and performance which would be required for intended clinical applications in the treatment of osteoarthritis and also to show that the capabilities of 3D bioprinting and functionally graded additive manufacturing scaffolds are suitable to meet most of these requirements.The authors would like to thank H2020-MSCARISE programme, as this work is part of developments carried out in BAMOS project, funded from the European Union’s Horizon 2020 research and innovation programme under Grant Agreement No. 734156.info:eu-repo/semantics/publishedVersio