Prisms and slabs made of high-refractive-index materials such as ZnSe, Ge, and Si can be designed as broadband, 50%-50%, beam splitters (BSs) for obliquely incident s- polarized light in the near- and mid-IR. The beam-splitting face of the prism or slab is uncoated, while the exit face is antireflection coated. The split beams travel in orthogonal directions when light is incident at the Brewst...

1 2 6 12 18 24 36 42 44 48 50 52 54 56 58 61 Summary Report overview 1. Recent trends in average fuel consumption for new cars 2. How great is the technical potential to reduce new car fuel consumption by 2020 and by 2030? 3. The critical distinction between the technical potential to improve fuel economy and how much of that technical potential is realized 4. Policies to encourage the producti...

BACKGROUND AND OBJECTIVES Few investigations have addressed the safety of oxygen from concentrators for use in anesthesia in association with nitrous oxide. This study evaluated the percent of oxygen from a concentrator in association with nitrous oxide in a semi-closed rebreathing circuit. METHODS Adult patients undergoing low risk surgery were randomly allocated into two groups, receiving a...

We present a low-loss, compact, polarization insensitive 3-dB optical power-splitter for submicron silicon waveguides. The splitter is optimized over broad wavelength span ranging from 1300 to 1700 nm through finite difference time domain simulations. junction footprint only 1.8 × 1.3 ?m, which smaller than previously reported broadband multimode splitters. Furthermore, the demonstrated device ...

هدف: این پژوهش با هدف ارائه مدل چالش‌های پرورش کودکان کم‌شنوای پیش‌دبستانی از دیدگاه مادران و متخصصان بر اساس نظریه داده‌بنیاد انجام ‌شده است. روش: نمونه 15 مادر کودک کم‌شنوا 4 تا 6 ساله انجمن والدین شهر تهران 5 متخصص حوزه ناشنوا بودند که در سال 1400 استفاده روش نمونه‌گیری هدفمند انتخاب شدند. چالش ­های طریق مصاحبه نیمه ساختاریافته عمیق رسیدن به اشباع نظری جمع‌آوری کدگذاری (کدگذاری باز، محوری ان...