We present the first calculation of saltation transport and dune formation on Mars and compare it to real dunes. We find that the rate at which grains are entrained into saltation on Mars is 1 order of magnitude higher than on Earth. With this fundamental novel ingredient, we reproduce the size and different shapes of Mars dunes, and give an estimate for the wind velocity on Mars.

MARS is one of the AES nalists. The up-to-date analysis of MARS includes the discovery of weak keys, and Biham's estimation that a 12round variant of MARS is breakable. This estimation was partly founded based on a 7-round impossible di erential of the core of MARS. However, no such attack was presented to-date. In this paper we present two new longer impossible di erentials of 8 rounds.

Most studies of active aeolian processes on Mars have focused on dust [1], i.e., particles -1 [tm in diameter that are transported in suspension by wind. The presence of sand dunes on Mars [2-8] indicates that larger grains ( >60 _tm, transported primarily in saltation) are also present. Although indirect evidence suggests that some dunes may be active [9], definitive evidence is lacking. Nonet...

This paper outlines the design and implementation of the Mobile Autonomous Robotic Sentry (MARS) unit with facial detection and recognition capabilities. MARS patrols its surrounding area, performing obstacle avoidance and searching for human threats using facial detection. Once a threat has been identified, MARS will aim at its target and fire projectiles. In addition to facial detection, MARS...

Spacecraft exploring Mars such as the Mars Exploration Rovers Spirit and Opportunity, as well as the Mars Science Laboratory or Curiosity rover, have accumulated evidence for wet and habitable conditions on early Mars more than 3 billion years ago. Current conditions, by contrast, are cold, extremely arid and seemingly inhospitable. To evaluate exactly how dry today's environment is, it is impo...

هدف: این پژوهش با هدف بررسی اثر آموزش برنامه هوش موفق استرنبرگ بر افزایش خلاقیت و تحمل ابهام دانش‌­آموزان انجام شد. روش: روش ­آزمایشی طرح پیش ­آزمون پس پیگیری گروه کنترل بود. جامعۀ آماری را 15842 نفر ازدانش‌­آموزان پسر کلاس چهارم در سال تحصیلی1399-1400 شهر اصفهان تشکیل دادند که30 نمونه‌­گیری تصادفی چند مرحله­‌ای انتخاب به صورت دو آزمایش (15 نفر) گمارده شدند. ده جلسه برنامه‌­ی دریافت نمود. داده­...

In the AAAI ’ “Life on Mars” competition this year, we intend to employ a multi-robot team which combines traditional methods of autonomous navigation with experimental group arbitration strategies to explore and map a simulated extra-terrestrial environment. By communicating with each other to optimize the search, the robots will be able to explore the environment faster than could a single ro...

In this paper, the main problem and countermeasure of fruit production quality and safety were studied in Yanshan Mountain. The subjective factor was fruit farmer quality and safety consciousness faint, and the objective factors were: severe orchard environmental pollution, faint fruit postharvest handling, lag in process technology, fruit quality determination and market inspection system is n...

Purpose – The purpose of this paper is to describe the tools and strategies that were employed by C/W MARS to successfully develop and implement the Digital Treasures digital repository. Design/methodology/approach – This paper outlines the planning and subsequent technical issues that arise when implementing a digitization project on the scale of the large, multi-type, automated library networ...