High Temperature Creep Resistance of High Purity Chromium in Argon

High Temperature Behaviour of Positrons in Argon

When a swarm of positrons is introduced into a gaseous assembly, there are many processes by which the positrons can arrive at their eventual annihilation fate. Depending on the energy, some positrons form positronium prior to annihilation. However, when the energy is less than the positronium formation threshold, Eth (9 eV for argon, 17.8 eV for helium, etc.), then only elastic collisions are ...

Creep Parameters of Spruce Wood in High Temperature Environment

The paper presents partial results of an ongoing project dealing with thermal diffusion and mechanical behavior of spruce wood in high temperature environment (up to 180°C). The objective of this part of study was to obtain rheological properties of spruce wood which will be used in future modeling of wood performance in high temperatures. Oven dry samples (30 x 30 x 700 mm) underwent constant ...

New orientationally ordered low-temperature superstructure in high-purity C60.

A Comment on the Letter by G. Van Tendeloo et al. Phys. Rev. Lett. 69, 1065 (1992). Disciplines Physics | Quantum Physics This journal article is available at ScholarlyCommons: http://repository.upenn.edu/physics_papers/477 VOLUME 70, NUMBER 1 PHYSICAL REVIEW LETTERS 4 JANUARY 1993 Comment on "New Orientationally Ordered LowTemperature Superstructure in High-Purity C60" In an interesting Letter...

The Low Temperature Thermal Resistance of High Purity Copper and Bolted Copper Joints

focus on communication in iranian high school language classes: a study of the role of teaching materials in changing the focus onto communication in language classes

چکیده ارتباط در کلاس به عوامل زیادی از جمله معلمان، دانش آموزان، برنامه های درسی و از همه مهم تر، مواد آموزشی وابسته است. در تدریس ارتباطی زبان که تاکید زیادی بر توانش ارتباطی دارد، کتاب درسی به عنوان عامل موثر بر پویایی کلاس محسوب میگردد که درس ها را از طریق فراهم آوردن متن ارتباط کلاسی و هم چنین نوع تمرین زبانی که دانش آموزان در طول فعالیت های کلاسی به آن مشغول اند، کنترل می کند. این حقیقت ک...