The fundamental frictional behaviour of carbon fibre tows relevant to composite fabric forming is explored. Tow-on-tool and tow-on-tow contact are considered. For tow-on-tool contact, an experiment is devised to simultaneously observe the true filament contact length and measure the friction force over a range of normal loads. Filament contact length is not constant, as would be given from an i...

Simulations of barge-tow movement in the sub-critical range along the Illinois River near Kampsville are performed to determine the return flow (RF) characteristics for upstream and downstream bound barge-tows. Simulations are carried out using the OpenFOAM® based CFD software for six barge-tow configurations considering two-dimensional shallow water equation. The RF velocities are simulated fo...

Głównymi celami niniejszej pracy są ocena aktualnego stanu ekoturystyki w regionie Jeziora Aralskiego Uzbekistanie oraz zaproponowanie strategii jej zrównoważonego rozwoju. Aby zidentyfikować wymagane strategie zarządzania, przeprowadzono analizę zagrożeń, szans słabych i mocnych stron (TOWS). Zamierzeniem autorów artykułu było również dokonanie przeglądu literatury, której opisano promocję Ara...

این پژوهش با الهام گرفتن از نتایج یک طرح مطالعاتی کاربردی، رویکرد سلسله­‌مراتبی جهت پیگیری فرایند توسعه تأمین‌کنندگان و حمایت تصمیمات موجود در هر مراحل آن ارائه‌ می‌کند. ابتدا، زمینه‌های تأمین نیازمند سپس واجد شرایط هریک زمینه‌ها به کمک تصمیم‌گیری چندشاخصه بهترین-بدترین مشخص می‌گردند. معیارهای شناسایی نیز مرور مطالعات پیشین بهره‌گیری نظرات خبرگان حوزه‌ی خرید استخراج‌شده‌اند. درنهایت، مدل ریاضی ...

In Liquid Composite Molding (LCM) processes, a fabric reinforcement is placed in closed cavity and resin injected into the mold. Almost all reinforcements are dual scale containing fiber tows, which fill at different rate than region between tows. Simulation of LCM processes can help identify regions that fail to fill. However, presence flow usually neglected. Here this phenomenon modeled using...

Evaluating the current ecotourism situation in Aral Sea region of Uzbekistan and offering strategies for its sustainable development are main objectives study. The threats, opportunities, weaknesses strengths (TOWS) analysis was applied to identify required management strategies. article aims review literature on promotion region. Based TOWS, results show that state support during pandemic shou...