Kinematically Redundant Octahedral Motion Platform for Virtual Reality Simulations

We propose a novel design of a parallel manipulator of Stewart Gough type for virtual reality application of single individuals; i.e. an omni-directional treadmill is mounted on the motion platform in order to improve VR immersion by giving feedback to the human body. For this purpose we modify the well-known octahedral manipulator in a way that it has one degree of kinematical redundancy; namely an equiform reconfigurability of the base. The instantaneous kinematics and singularities of this mechanism are studied, where especially "unavoidable singularities" are characterized. These are poses of the motion platform, which can only be realized by singular configurations of the mechanism despite its kinematic redundancy.Comment: 13 pages, 6 figure

Si photocathode with Ag-supported dendritic Cu catalyst for CO2 reduction

Si photocathodes integrated with Ag-supported dendritic Cu catalysts are used to perform light-driven reduction of CO2 to C2 and C3 products in aqueous solution. A back illumination geometry with an n-type Si absorber was used to permit the use of absorbing metallic catalysts. Selective carrier collection was accomplished by a p+ implantation on the illumination side and an n+ implantation followed by atomic layer deposition of TiO2 on the electrolyte site. The Ag-supported dendritic Cu CO2 reduction catalyst was formed by evaporation of Ag followed by high-rate electrodeposition of Cu to form a high surface area structure. Under simulated 1 sun illumination in 0.1 M CsHCO3 saturated with CO2, the photovoltage generated by the Si (∼600 mV) enables C2 and C3 products to be produced at -0.4 vs. RHE. Texturing of both sides of the Si increases the light-limited current density, due to reduced reflection on the illumination side, and also deceases the onset potential. Under simulated diurnal illumination conditions photocathodes maintain over 60% faradaic efficiency to hydrocarbon and oxygenate products (mainly ethylene, ethanol, propanol) for several days. After 10 days of testing, contamination from the counter electrode is observed, which causes an increase in hydrogen production. This effect is mitigated by a regeneration procedure which restores the original catalyst selectivity. A tandem, self-powered CO2 reduction device was formed by coupling a Si photocathode with two series-connected semitransparent CH3NH3PbI3 perovskite solar cells, achieving an efficiency for the conversion of sunlight to hydrocarbons and oxygenates of 1.5% (3.5% for all products)

Transmission spectra and valley processing of graphene and carbon nanotube superlattices with inter-valley coupling

published_or_final_versio

Efektifitas Implementasi Smm Iso 9001:2008 Pada Smk Negeri Di Kota Singaraja

Penelitian ini bertujuan untuk memberikan gambaran tentang : 1) efektivitas penerapan Sistem Manajemen Mutu (SMM) ISO 9001:2008 pada SMK Negeri di kota Singaraja dilihat dari konteks, masukan, proses, dan hasil penerapan; 2) kendala-kendala yang dihadapai dalam melaksanakan SMM ISO 9001:2008 pada SMK Negeri dikota Singaraja serta alternatif pemecahannya. Penelitian ini dilaksanakan pada SMK Negeri dikota Singaraja pada tahun pelajaran 2013/2014, dengan menggunakan model evaluasi CIPP dari Stufflebeam yang melibatkan 354 responden. Variabel konteks yang terdiri dari sub variabel SMM sekolah dan keterlibatan komite sekolah. Variabel masukan terdiri dari sub variabel manajemen sekolah dan keterlibatan dunia USAha/dunia industri (DU/DI). Variabel proses yang terdiri dari sub variabel pemeliharaan dan pengadaan sarana pendidikan, kegiatan belajar mengajar oleh guru, dan kegiatan belajar mengajar siswa. Variabel produk dengan sub variabel nilai ujian tahun pemelajaran 2013/2014 (UN, US dan UK). Metode kuesioner digunakan untuk menjaring data SMM sekolah, manajemen sekolah dengan responden semua staff manajemen, keterlibatan dunia USAha/dunia industri (DU/DI), dan proses pembelajaran siswa. Metode wawancara untuk menjaring data keterlibatan komite sekolah. Metode observasi untuk menjaring data kegiatan belajar mengajar oleh guru. Metode studi dokumen untuk menjaring data SMM sekolah, pengadaan dan pemeliharaan sarana pendidikan, dan nilai ujian. Hasil penelitian menunjukkan bahwa : 1) efektif dilihat dari variabel konteks dengan frekuensi kategori positif 54.286% untuk SMM dan frekuensi kategori positif 75% untuk keterlibatan komite; 2) efektif dilihat dari variabel masukan dengan frekuensi kategori positif 57.6271% untuk manajmen sekolah dan frekuensi kategori positif 52.041% untuk keterlibatan DU/DI; 3) kurang efektif dilihat dari variabel proses dengan frekuensi kategori negatif 63.1578% untuk pemeliharaan dan pengadaan saran pendidikan, dan frekuensi kategori positif 57.4713% untuk kegiatan belajar mengajar oleh guru, dan frekuensi kategori positif 52.308% untuk kegiatan belajar mengajar siswa; 4) efektif dilihat dari variabel produk dengan frekuensi kategori positif 52.055.00% untuk nilai ujian. Bertolak dari hasil penelitian tersebut dapat direkomendasikan: 1) meningkatkan koordinasi setiap kebijakan baru; 2) penerapan SMM perlu disosialisasikan secara terus menerus pada setiap kesempatan; 3) meningkatkan komitmen warga sekolah untuk menerapakan SMM; 4) meningkatkan koordinasi dengan industri menuju Manajemen Partisipatif; 5) memberikan tugas dan tanggungjawab yang jelas kepada kepala program

灾后的哀伤辅导与升华

Conference Theme: Rehabilitation after Disaster - 災後康復: 四川汶川地震傷患康復論壇postprint第十一屆京港醫學交流會議：災後康復: 四川汶川地震傷患康復論壇, 中國, 四川, 成都, 2009年10月24-25日.The 11th Beijing-Hong Kong Medical Exchange : Rehabilitation after Disaster, Chengdu, Sichuan, 24-25 October 2009

Adverse prognostic and predictive significance of low DNA-dependent protein kinase catalytic subunit (DNA-PKcs) expression in early-stage breast cancers

Background: DNA-dependent protein kinase catalytic subunit (DNA-PKcs), a serine threonine kinase belonging to the PIKK family (phosphoinositide 3-kinase-like-family of protein kinase), is a critical component of the non-homologous end joining (NHEJ) pathway required for the repair of DNA double strand breaks. DNA-PKcs may be involved in breast cancer pathogenesis. Methods: We evaluated clinicopathological significance of DNA-PKcs protein expression in 1161 tumours and DNA-PKcs mRNA expression in 1950 tumours. We correlated DNA-PKcs to other markers of aggressive phenotypes, DNA repair, apoptosis and cell cycle regulation. Results: Low DNA-PKcs protein expression was associated with higher tumour grade, higher mitotic index, tumour de-differentiation and tumour type (ps<0.05). Absence of BRCA1, low XRCC1/SMUG1/APE1/Polβ were also more likely in low DNA-PKcs expressing tumours (ps<0.05). Low DNA-PKcs protein expression was significantly associated with worse breast cancer specific survival (BCCS) in univariate and multivariate analysis (ps<0.01). At the mRNA level, low DNA-PKcs was associated with PAM50.Her2 and PAM50.LumA molecular phenotypes (ps<0.01) and poor BCSS. In patients with ER positive tumours who received endocrine therapy, low DNA-PKcs (protein and mRNA) was associated with poor survival. In ER negative patients, low DNA-PKcs mRNA remains significantly associated with adverse outcome. Conclusions: Our study suggests that low DNA-PKcs expression may have prognostic and predictive significance in breast cancers

Thermodynamical Consistent Modeling and Analysis of Nematic Liquid Crystal Flows

The general Ericksen-Leslie system for the flow of nematic liquid crystals is reconsidered in the non-isothermal case aiming for thermodynamically consistent models. The non-isothermal model is then investigated analytically. A fairly complete dynamic theory is developed by analyzing these systems as quasilinear parabolic evolution equations in an $L^p-L^q$-setting. First, the existence of a unique, local strong solution is proved. It is then shown that this solution extends to a global strong solution provided the initial data are close to an equilibrium or the solution is eventually bounded in the natural norm of the underlying state space. In these cases, the solution converges exponentially to an equilibrium in the natural state manifold

The long-term impact of the MEMA kwa Vijana adolescent sexual and reproductive health intervention: effect of dose and time since intervention exposure.

BACKGROUND: Despite recent decreases in HIV incidence in many sub-Saharan African countries, there is little evidence that specific behavioural interventions have led to a reduction in HIV among young people. Further and wider-scale decreases in HIV require better understanding of when behaviour change occurs and why. The MEMA kwa Vijana adolescent sexual and reproductive health intervention has been implemented in rural Mwanza, Tanzania since 1999. A long-term evaluation in 2007/8 found that the intervention improved knowledge, attitudes to sex and some reported risk behaviours, but not HIV or HSV2 prevalence. The aim of this paper was to assess the differential impact of the intervention according to gender, age, marital status, number of years of exposure and time since last exposure to the intervention. METHODS: In 2007, a cross-sectional survey was conducted in the 20 trial communities among 13,814 young people (15-30 yrs) who had attended intervention or comparison schools between 1999 and 2002. Outcomes for which the intervention had an impact in 2001 or 2007 were included in this subgroup analysis. Data were analysed using cluster-level methods for stratified cluster-randomised trials, using interaction tests to determine if intervention impact differed by subgroup. RESULTS: Taking into account multiplicity of testing, concurrence with a priori hypotheses and consistency within the results no strong effect-modifiers emerged. Impact on pregnancy knowledge and reported attitudes to sex increased with years of exposure to high-quality intervention. CONCLUSIONS: The desirable long-term impact of the MEMA kwa Vijana intervention did not vary greatly according to the subgroups examined. This suggests that the intervention can have an impact on a broad cross-section of young people in rural Mwanza. TRIAL REGISTRATION: ClinicalTrials.gov NCT00248469

Clinical-pathological study on β-APP, IL-1β, GFAP, NFL, Spectrin II, 8OHdG, TUNEL, miR-21, miR-16, miR-92 expressions to verify DAI-diagnosis, grade and prognosis

Traumatic brain injury (TBI) is one of the most important death and disability cause, involving substantial costs, also in economic terms, when considering the young age of the involved subject. Aim of this paper is to report a series of patients treated at our institutions, to verify neurological results at six months or survival; in fatal cases we searched for βAPP, GFAP, IL-1β, NFL, Spectrin II, TUNEL and miR-21, miR-16, and miR-92 expressions in brain samples, to verify DAI diagnosis and grade as strong predictor of survival and inflammatory response. Concentrations of 8OHdG as measurement of oxidative stress was performed. Immunoreaction of β-APP, IL-1β, GFAP, NFL, Spectrin II and 8OHdG were significantly increased in the TBI group with respect to control group subjects. Cell apoptosis, measured by TUNEL assay, were significantly higher in the study group than control cases. Results indicated that miR-21, miR-92 and miR-16 have a high predictive power in discriminating trauma brain cases from controls and could represent promising biomarkers as strong predictor of survival, and for the diagnosis of postmortem traumatic brain injury