OPTIMALISASI PARAMETER PROSES INJEKSI PADA HDPE RECYCLE MATERIAL UNTUK MEMPEROLEH MINIMUM SINK MARKS MENGGUNAKAN PENDEKATAN METODE TAGUCHI

Hasil produk plastik yang diperoleh dari bahan baku HDPE daur ulang banyak menghasilkan cacat produk dibandingkan produk plastik yang menggunakan HDPE baru.Tujuan penelitian ini untuk mendapatkan kondisi yang optimal pada proses injection molding berupa parameter proses untuk memperoleh minimum sink marks dengan pedekatan DOE (Design of experiment) Taguchi dan mengetahui parameter yang sesuai untuk meminimalkan cacat sink marks di HDPE daur ulang dengan menggunakan parameter proses holding time, holding pressure, back pressure, dan injection pressur. Hasil Penelitian menunjukan bahwa dari percobaan ke 9 berdasarkan desain faktorial yaitu dengan variasi holding time level 3, holding pressure level 3, Back pressure level 2, dan Injection pressure level 1 diperoleh nilai sink marks minimum sebesar 0,2 mm dari 9 percobaan yang dilakukan

Proof of Concept for the Detection of Local Pressure Marks in Prosthesis Sockets Using Structural Dynamics Measurement

The wear comfort of a prosthesis is of great importance for amputee patients. The wear comfort can be affected by changes in the interface between the residual limb and prosthesis socket, which can be caused by time-dependent volume fluctuations of the tissue, leading to unwanted local pressure marks. The basis to ensure time-independent wear comfort of a prosthesis is to identify these changes. Common techniques for identifying these variations have a negative impact on the sensitive interface between the residual limb and prosthesis. The following paper contains a proof of concept for the detection of local pressure marks without affecting the described interface using structural dynamics measurements, exemplarily shown at a prosthetic socket for transfemoral amputees in a test bench scenario. The dynamical behaviour of the investigated system is analysed in the form of frequency response functions acquired for different pressure locations and preloads using an impact hammer for excitation and a triaxial acceleration sensor. The frequency response functions show major changes for the various boundary conditions with respect to their frequency-dependent compositions. The results demonstrate how the utilised method enables the identification of changes in local pressure marks regarding the variation of position and magnitude

Extending Prayer Marks as a Sign of Worsening Chronic Disease

A 60-year old Muslim man was admitted to the Dhaka Hospital of ICDDR,B with an exacerbation of his chronic obstructive pulmonary disease. Incidental hyperpigmented skin lesions were noticed overlying the dorsum of his ankles, knees, and elbows. Such asymptomatic areas of thickened, lichenified and hyperpigmented skin are called ‘prayer marks’ and are well-imprinted on the knees, ankles, and forehead. These are secondary to prolonged periods of pressure over bony prominences during prayer. The patient's wife stated that the appearance of the elbow marks had coincided with an increase in his breathlessness and subsequent use of his elbows to rise from daily prayers. Prayer marks extending to the elbows could be a sign of worsening chronic disease

The Courier, Volume 13, Issue 2, October 4, 1979

Stories: He Isn’t A Student Here Now — V.P. Resigns Under Pressure Vets Issue Still Simmers—Washington Official Says Legal Text Backs Skyer Lambert Rd. Changes Planned For Spring, 1980 People: Doug Marks Valerie Prohammer Mike Skyer Carole Dobbie Bill Bel

Resistivity studies under hydrostatic pressure on a low-resistance variant of the quasi-2D organic superconductor kappa-(BEDT-TTF)2Cu[N(CN)2]Br: quest for intrinsic scattering contributions

Resistivity measurements have been performed on a low (LR)- and high (HR)-resistance variant of the kappa-(BEDT-TTF)_2Cu[N(CN)_2]Br superconductor. While the HR sample was synthesized following the standard procedure, the LR crystal is a result of a somewhat modified synthesis route. According to their residual resistivities and residual resistivity ratios, the LR crystal is of distinctly superior quality. He-gas pressure was used to study the effect of hydrostatic pressure on the different transport regimes for both variants. The main results of these comparative investigations are (i) a significant part of the inelastic-scattering contribution, which causes the anomalous rho(T) maximum in standard HR crystals around 90 K, is sample dependent, i.e. extrinsic in nature, (ii) the abrupt change in rho(T) at T* approx. 40 K from a strongly temperature-dependent behavior at T > T* to an only weakly T-dependent rho(T) at T < T* is unaffected by this scattering contribution and thus marks an independent property, most likely a second-order phase transition, (iii) both variants reveal a rho(T) proportional to AT^2 dependence at low temperatures, i.e. for T_c < T < T_0, although with strongly sample-dependent coefficients A and upper bounds for the T^2 behavior measured by T_0. The latter result is inconsistent with the T^2 dependence originating from coherent Fermi-liquid excitations.Comment: 8 pages, 6 figure

Policy Performance and Governance Capacities in the OECD and EU. Sustainable Governance Indicators 2018. Bertelsmann Studies

This year marks the release of the third edition of the Sustainable Governance Indicators (SGI). The highly developed industrial nations continue to face enormous challenges, due not only to aftereffects of the global economic and financial crisis and the associated labor-market and sociopolitical upheavals. In other areas too, these nations look forward to a future rife with complex problems. Aging and shrinking populations, environmental and climatic changes, and social, cultural and technological shifts are placing democracies under massive pressure to adapt. As early as the first edition of the SGI, it was evident that despite often-similar reform pressures, political systems’ approaches and track records show significant variance. And in times of advancing globalization, the need for effective governance driven by capable leadership remains important. The previous SGI editions have also underscored the fact that this steering capability depends critically on the ability to combine short-term responsiveness with long-term resolve in policymaking

Cluster Formation in Contracting Molecular Clouds

We explore, through a simplified, semi-analytic model, the formation of dense clusters containing massive stars. The parent cloud spawning the cluster is represented as an isothermal sphere. This sphere is in near force balance between self-gravity and turbulent pressure. Self-gravity, mediated by turbulent dissipation, drives slow contraction of the cloud, eventually leading to a sharp central spike in density and the onset of dynamical instability. We suggest that, in a real cloud, this transition marks the late and rapid production of massive stars. We also offer an empirical prescription, akin to the Schmidt law, for low-mass star formation in our contracting cloud. Applying this prescription to the Orion Nebula Cluster, we are able to reproduce the accelerating star formation previously inferred from the distribution of member stars in the HR diagram. The cloud turns about 10 percent of its mass into low-mass stars before becoming dynamically unstable. Over a cloud free-fall time, this figure drops to 1 percent, consistent with the overall star formation efficiency of molecular clouds in the Galaxy.Comment: To appear in ApJ Vol. 667, September 2