The shots heard 'round the world.
نویسنده
چکیده
The massacre at Columbine High School last year unleashed a torrent of fresh concern over the threat that violence poses to society. It also energized a government research effort to understand and prevent violence. Ironically, this flurry of activity comes at a time when youth violence, as reflected in crime statistics, is in decline.
منابع مشابه
Evaluation of the Influence of the Number of Laser Shots on the Characterization of TiO2/MgO Nanocomposites
The objectives of this work is to synthesize TiO2/MgO nanocomposites using a pulse laser deposition technique. At a vacuum pressure of 2.5 10-2 mBar, TiO2/MgO nanocomposites were synthesized on substrates with a laser power of 600 mJ and a wavelength of 1064 nm. This search utilizes various pulses (500, 600, and 700) at a 6-Hertz repetition rate. X-ray diffraction was utilized to inves...
متن کاملBiomechanical analysis of successful versus unsuccessful free throw shots performed by professional basketball players
The main purpose of the present study was to investigate the kinematics and kinetics of successful versus unsuccessful basketball free throw shots. Six professional basketball players (age= 23±2.09 years members of Iranian premier basketball league participat in test. Kinematics of arm motion during basketball free throws were recorded by two Casio zr200 camera in frequency of 240 Hz. Wilcox...
متن کاملImmunogenicity of Four Doses of Double-Strength Intramuscular Hepatitis B
Background: Hepatitis B virus potentially accelerates graft rejection and mortality in renal transplantation population. Vaccination of graft candidates without prior immunization against HBV seems essential before transplantation but some candidates of transplantation have not received HBV vaccine at the time of receiving graft. We aimed to evaluate immunogenicity of ...
متن کاملConcluding Remarks of the Second International Congress on Traditional Medicne & Materia Medica, 4-7 oct. 2004, tehran, iran
Plants are one of the great resources of the world, and as humankind has evolved, socially, spiritually, and economically, we have found, collectively, a myriad uses for the plants around us. One of those uses is for the prevention, treatment, and cure of various disease states. Documented knowledge about such use dates back at least 4000 years, and several of the plant mentioned in the ancie...
متن کاملThe Heard-Of Model: Unifying all Benign Failures
Problems in fault-tolerant distributed computing have been studied in a variety of models. These models are structured around two central ideas: 1. Degree of synchrony and failure model are two independent parameters that determine a particular type of system. 2. Failure and faulty component (i.e., the component responsible for the failure) are necessary and indissociable notions for the analys...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Science
دوره 289 5479 شماره
صفحات -
تاریخ انتشار 2000