نتایج جستجو برای: کمپوزیت campsite
تعداد نتایج: 111 فیلتر نتایج به سال:
از غشای کمپوزیتی بر مبنای پی وی سی در الکترود پلاتینی کوت شده گزینش پذیر وحساس برای اندازگیری یون مس استفاده شده است. حسگر دارای شیب نرنستی 17/0±50/29 میلی ولت در گستره وسیعی از غلظت از 7-10×7/8 تا 1-10×0/1 مولار می باشد. حد تشخیص 7-10×1/1 مولار و رنج اسیدی کاربردی 0/7- 0/3 واحد ph- می باشد. زمان پاسخ گویی الکترود 6 ثانیه است. این الکترود حداقل برای سه ماه قابل استفاده است .ضریب گزینش پذیری الک...
در گذشته تورهای استفاده شده در کار و تجارت توسط نیروی انسانی حمل و بار گذاری می شدند؛ بنابراین نیاز به استحکام بالایی نداشتند؛ اما امروزه با افزایش نیازها و ساخت ماشین آلاتی با قدرت های فوق بشری محدوده ی استحکام تورهای حامل نیز بیشتر شده است. کارهایی همچون انتقال بارهای سنگین و ماهیگیری که از گذشته تا به امروز ادامه یافته شامل تحول اشاره شده بوده و نیاز به تغییری طراحی شده را برای این محصول الز...
Human nature derives from the conflict between our better and poorer “angels.” This much one can glean from the pages of literature, history, philosophy, and (when read from a non-theistic perspective) theology. In The Social Conquest of Earth (SCE), biologist Edward O. Wilson goes on to attribute this conflict to multilevel natural selection, “in which individual selection and group selection ...
Limits on the overall number of recreationists permitted to enter or visit wilderness, national park backcountry or whitewater rivers have been formally established for about 30 years. Such limits have usually been established to protect biophysical or social conditions from unacceptable impacts in the face of rapidly rising amounts of visitation. Use limits are one of a number of tools availab...
Ancient Costa Ricans in the Arenal area exhibited extraordinary persistence in landscape use and social memory, in spite of repeated catastrophes caused by explosive volcanic eruptions. The Cañales village on the south shore of Lake Arenal was struck by two large explosive eruptions during the Arenal phase (500 b.c.–a.d. 600). Following ecological recovery, the village was reoccupied after each...
Flood conditions present dangers for canoe camping, with the highest risk injury or death related to water submersion of paddlers. Other hazards can exist at high stages as well. This essay discusses preparation risks associated travel during record flood in Alabama’s Mobile-Tensaw River Delta. It examines unique aspects paddling through submerged forests, route detours necessitated by flooding...
The Pleistocene Fluvial-lacustrine of Ait Hajji Formation is located in South East of Tiddas, and in the Quaternary deposits of the Moroccan Central Plateau. These outcrops represent on a geomorphosite of great importance for the study of geological heritage, and for a natural eco-tourism valorization in Morocco. For to aim a natural tourism promotion, for indigenous peoples, this geomorphosite...
Above: In many wilderness areas, recreational access must be limited so that visitors can experience solitude and pristine ecosystems. One challenge facing wilderness managers is finding the balance between access and preservation that maximizes those values. D av id N . C ol e monitoring conditions, implementing restricted permit systems or other visitor management techniques, educating visito...
Hand stencils directly represent modern humans in landscape settings around the world. Yet their social and cultural contexts are often overlooked due to lack of ethnography associated with artwork. This paper explores hand from Kundumbue Pundimbung rock art sites, situated traditional boundaries Auwim people East Sepik Province Papua New Guinea. Combining archaeological analysis ethnographic k...
Fostering self-esteem in adolescents is a common goal of community and school counselors, particularly counselors who work with at-risk populations and issues. Adventure-based Counseling (ABC) activities can enhance self-esteem through both prevention and intervention efforts for children and adolescents. Article: It is readily apparent to counselors who work with children and adolescents that ...
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