OBJECTIVE Vitamin D deficiency (VDD) and vitamin D insufficiency (VDI) are significant health problems all over the world. The aim of this study was to determine the prevalence of VDD and VDI in children and adolescents residing in 8 provinces in the Kingdom of Saudi Arabia and to also investigate calcium homeostasis in these subjects. METHODS A cross-sectional study was conducted in 2110 par...

OBJECTIVES The cloud computing-based virtual desktop infrastructure (VDI) allows access to computing environments with no limitations in terms of time or place such that it can permit the rapid establishment of a mobile hospital environment. The objective of this study was to investigate the empirical issues to be considered when establishing a virtual mobile environment using VDI technology in...

Driving simulators need an Intelligent Tutoring System (ITS). Simulators provide ways to conduct objective measurements on students' driving behavior and opportunities for creating the best possible learning environment. The generated traffic situations can be influenced directly according to the needs of the student. We created an ITS the Virtual Driving Instructor (VDI) for guiding the learni...

Die durchgängige Modellierung bei der Entwicklung mechatronischer Systeme ist von entscheidender Bedeutung. Im Entwicklungsprozess für mechatronische Systeme nach VDI-Richtlinie 2206 ist dies bisher jedoch nicht hinreichend berücksichtigt. Diese Arbeit zeigt auf, wie eine durchgängige Modellierung auf Basis der VDI-Richtlinie 2206 erreicht werden kann, indem eine Transformation eines Modells de...

Abstract Dr. Christian Poppe ist neuer Vorsitzender des VDI‐Fachbereichs GVC03 „Betrieb verfahrenstechnischer Anlagen“, der fachlichen Heimat Betriebsingenieure im VDI. Zur stellvertretenden Vorsitzenden wurde Frau Alba Mena Subiranas gewählt.

The state from which channel inactivation occurs is both biologically and mechanistically critical. For example, preferential closed-state inactivation is potentiated in certain Ca(2+) channel splice variants, yielding an enhancement of inactivation during action potential trains, which has important consequences for short-term synaptic plasticity. Mechanistically, the structural substrates of ...

Virtual Desktop Infrastructure (VDI) based on virtual computing laboratories (VCL) model has been implemented in a small or medium scale on cloud computing in universities. Conventional physical computing laboratories with thousands of PCs are still widely used and co-exist with the VCL, however, the conventional PCs are not fully utilized in VCL. The demand of VDI is growing but the numbers of...

The Virtual Desktop Infrastructure (VDI) technology is considered one such practical solution. Since VDI provides a remote workstation offering so that no data is stored locally on an endpoint device, it is touted as the security solution against data theft. While such a solution comes in handy when a mobile device is stolen, how does VDI scale when the device itself is compromised by a threat ...

Leg venous hemodynamics [venous distensibility index (VDI), arterial flow index (AFI), half-emptying time (T1/2)], and leg volumes (LV) were assessed by mercury strain-gauge plethysmography with venous occlusion and volometry, respectively, in seven men before, during, and after 42 days of 6 degrees head-down bed rest. Results showed a high increase in VDI up to day 26 of bed rest (+50% vs. con...

This paper evaluated the capacity of SPOT VEGETATION time-series to monitor herbaceous fuel moisture content (FMC) in order to improve fire risk assessment in the savanna ecosystem of Kruger National Park in South Africa. In situ herbaceous FMC data were used to assess the Normalized Difference Vegetation Index (NDVI), Normalized Difference Water Index (NDWI), Vegetation Dryness Index (VDI), Im...