We recorded the manifestations of severe vitamin D deficiency (VDD) in 40 adolescents before and 3 and 6 months after treatment with a mega dose of cholecalciferol (10 000 IU kg(-1), max 600 000 IU). Significant improvement of symptoms related to VDD was reported in 34/40. Three months after the injection, serus calcium, phosphate, alkaline phosphatase and parathormone were normal in all adoles...

Reducing the power consumption of digital designs through the use of more than one Vdd value (Multi-Voltage) is known and well practiced. Some manufacturing defects have Vdd-dependency, which implies defects can become active only at certain power supply setting, leading to reduced defect coverage. This chapter presents a coherent overview of recently reported research in testing strategies for...

Canary bitcells act as online monitors in a feedback architecture to sense the proximity to the Data Retention Voltage (DRV) for core SRAM bitcells during standby voltage scaling. This approach implements aggressive standby VDD scaling by tracking PVT variations and gives the flexibility to tradeoff between the safety of data and decreased leakage power. A 90nm 128Kb SRAM test chip confirms tha...

OBJECTIVE Materno-fetal vitamin D deficiency (VDD) may occur in the early neonatal period. We aimed to evaluate the vitamin D (vitD) status and risk factors for VDD in healthy newborns and their mothers, and also in fertile women. METHODS Serum 25 hydroxyvitamin D3 (25(OH)D), calcium (Ca), phosphorus (P) and alkaline phosphatase (ALP) levels were measured in 70 mothers (study group) and their...

The prevalence of severe vitamin D deficiency (VDD) in adolescents is variable but considerably high in many countries, especially in Middle-east and Southeast Asia. Different factors attribute to this deficiency including lack of sunlight exposure due to cultural dress codes and veiling or due to pigmented skin, and less time spent outdoors, because of hot weather, and lower vitamin D intake. ...

the most important characteristic of dome and factors influencing it in the islamic iranian architecture that is different from other courses is construction and construction methods of them. over time, different factors are involved in the process of formation of the domes. it is one of the factors influencing the structure of iranian-islamic domes. by examining the structure of iranian-islami...

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...

The minimum operating voltage (VDDmin) of 90-nm CMOS ring oscillators (RO’s) is investigated in order to clarify the lower limit of supply voltage (VDD) for logic circuits. The measured VDDmin is determined by the intra-die threshold voltage random variations and increased from 91 mV to 224 mV when the number of RO stages increased from 11 to 1001, which hinders the VDD scaling. Lowering VDDmin...

In this paper we define the theory and basic principles to move (redatum) the surface shots from a walk away VSP to be as if they had been located in the borehole. We will refer to this theory using several of the terms used in the literature including Time Reverse Acoustics (TRA), Seismic Interferometry (SI) and Virtual Source (VS) technology. Regardless of the name, the theory is built upon r...

To achieve the most energy-efficient operation, this brief presents a circuit design technique for separating the power supply voltage (VDD) of flip-flops (FFs) from that of combinational circuits, called the higher voltage FF (HVFF). Although VDD scaling can reduce the energy, the minimum operating voltage (VDDmin) of FFs prevents the operation at the optimum supply voltage that minimizes the ...