تاریخ انتشار : چهارشنبه 22 دی 1400 - 17:31
141 بازدید
کد خبر : 190320

هدیه یک میلیون دلاری ناسا به تیم‌های دانشجویی

هدیه یک میلیون دلاری ناسا به تیم‌های دانشجویی

ناسا با برگزاری یک رقابت دانشجویی،‌ به ۷ تیم از دانشگاه‌های مختلف آمریکا جایزه‌ای بالغ بر یک میلیون دلار اعطا کرد. به گزارش ایسنا، به نقل از سای‌تک‌دیلی، ناسا از دانشجویان سراسر آمریکا درخواست کرد که به برنامه اکتشاف پایدار انسان در ماه در مورد غبارهای قمری کمک کنند. ناسا از طریق برنامه چالش رقابتی ۲۰۲۱

هدیه یک میلیون دلاری ناسا به تیم‌های دانشجویی

ناسا با برگزاری یک رقابت دانشجویی،‌ به ۷ تیم از دانشگاه‌های مختلف آمریکا جایزه‌ای بالغ بر یک میلیون دلار اعطا کرد.

به گزارش ایسنا، به نقل از سای‌تک‌دیلی، ناسا از دانشجویان سراسر آمریکا درخواست کرد که به برنامه اکتشاف پایدار انسان در ماه در مورد غبارهای قمری کمک کنند.

ناسا از طریق برنامه چالش رقابتی ۲۰۲۱ و در راستای توسعه راه‌حل‌های خلاقانه در زمینه کاهش گرد و غبار ماه، نزدیک به یک میلیون دلار به ۷ تیم دانشگاهی جایزه داد.

“نیکی ورکایزر”( Niki Werkheiser) مدیر رشد فناوری اداره ماموریت فضایی ناسا در این زمینه گفت: این چالش برای دانشجویان و ناسا یک فرصت هیجان‌انگیز است.

وی ادامه داد: گرد و غبار قمری هرکار که ما روی کره ماه انجام می‌دهیم را تحت تاثیر قرار می‌دهد. بنابراین ما برای کاهش یا جلوگیری از اثرات آن به راهکارهای زیادی نیاز داریم. به این ترتیب،‌ این مفاهیم ابتکاری دانشجویی می‌تواند به حل برخی از مهم‌ترین مشکلات مربوط به گرد و غبار، به ناسا کمک کند.زیرا تیم‌های منتخب روش‌ها و فناوری‌هایی را برای کاهش گرد و غبار ماه توسعه خواهند داد.

این روش‌ها شامل سیستم‌های فیلتراسیون هوا و مفاهیمی شامل لنت‌های فرود بدون گرد و غبار خواهد بود.

مقادیر جایزه برای هر تیم متفاوت بوده و بر اساس نمونه کار اولیه و بودجه پیشنهادی هر تیم تعیین شده است.

دانشگاه‌هایی که در این رقابت موفق به دریافت جایزه شدند شامل تیم‌های دانشجویی از دانشگاه‌های براون،مؤسسهٔ فناوری کالیفرنیا، دانشکده معادن کلرادو،‌موسسه فناوری جورجیا، دانشگاه علم و صنعت میسوری، دانشگاه فلوریدا مرکزی، دانشگاه ایالتی واشنگتن است.

انتهای پیام

منبع:ایسنا

برچسب ها :

ناموجود
ارسال نظر شما
مجموع نظرات : 0 در انتظار بررسی : 0 انتشار یافته : ۰
  • نظرات ارسال شده توسط شما، پس از تایید توسط مدیران سایت منتشر خواهد شد.
  • نظراتی که حاوی تهمت یا افترا باشد منتشر نخواهد شد.
  • نظراتی که به غیر از زبان فارسی یا غیر مرتبط با خبر باشد منتشر نخواهد شد.

htthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtthtt