下载最新敏感专业列表

下载最新敏感专业列表 美国留学签证的敏感专业详细列表 今年美国签证形势整体开始发生转变，敏感专业的审查周期从以前的长达两个月缩短到 2~3周，且因专业审查而遭遇申请失败的人数极少。但是，如果申请者所学的专业属于敏感 专业，为了能按时到达学校，一定要提早向所在辖区的大使馆或者领事馆申请签证。 美国留学 敏感专业详细列表 The State Department maintains a Technical Alert List, also known as the sensitive major list, to guide their evaluation of visa submission. Sorted by rate. CRITICAL FIELDS LIST A. CONVENTIONAL MUNITIONS: Technologies associated with: -- Warheads and other large caliber projectiles -- Reactive armor and warhead defeat systems -- Fusing and arming systems. -- Electronic countermeasures and systems -- New or novel explosives and formulations -- Automated explosive detection methods and equipment B. NUCLEAR TECHNOLOGY: Technologies associated with production and use of nuclear material for both peaceful and military applications. Included are technologies for: -- Enrichment of fissile material -- Reprocessing irradiated nuclear fuel to recover produced plutonium -- Production of heavy water for moderator material -- Plutonium and tritium handling Also, certain associated technologies related to nuclear physics and/or nuclear engineering. Includes materials,equipment or technology associated with: -- Power reactors, breeder and production reactors -- Fissile or special nuclear materials -- Uranium enrichment, including gaseous diffusion,centrifuge, aerodynamic, chemical, Electromagnetic Isotopic Separation (EMIS), Laser Isotope Separation (LIS) -- Spent fuel reprocessing, plutonium, mixed oxide nuclear research Inertial Confinement Fusion (ICF) -- Magnetic confinement fusion -- Laser fusion, high power lasers, plasma, -- Nuclear fuel fabrication including Mixed Oxide (uranium- plutonium) fuels (MOX) -- Heavy water production -- Tritium production and use -- Hardening technology C. ROCKET SYSTEMS (including ballistic missile systems,space launch vehicles and sounding rockets) and Unmanned Air Vehicles (UAV) (including cruise missiles, target drones, and reconnaissance drones): Technologies associated with rocket systems and UAV systems. The technology needed to develop a satellite launch vehicle is virtually identical to that needed to build a ballistic missile. D. ROCKET SYSTEM AND UNMANNED AIR VEHICLE (UAV) SUBSYSTEMS: Propulsion technologies include solid rocket motor stages,and liquid propellant engines. Other critical subsystems include re-entry vehicles, guidance sets, thrust vector controls and warhead safing, arming and fusing. Many of these technologies are dual-use. Technologies include: -- Liquid and solid rocket propulsion systems -- Missile propulsion and systems integration -- Individual rocket stages or staging/separation mechanism -- Aerospace thermal (such as superalloys) and high-performance structures -- Propulsion systems test facilities E. NAVIGATION, AVIONICS AND FLIGHT CONTROL USEABLE IN ROCKET SYSTEMS AND UNMANNED AIR VEHICLES (UAV): These capabilities directly determine the delivery accuracy and lethality of both unguided and guided weapons. The long-term costs to design, build and apply these technologies have been a limiting proliferation factor. Technologies include those associated with: -- Internal navigation systems -- Tracking and terminal homing devices -- Accelerometers and gyroscopes -- Rocket and UAV and flight control systems. -- Global Positioning System (GPS) F. CHEMICAL, BIOTECHNOLOGY AND BIOMEDICAL ENGINEERING: The technology used to produce chemical and biological weapons is inherently dual-use. The same technologies that could be applied to develop and produce chemical and biological weapons are used widely by civilian research laboratories and industry; these technologies are relatively common in many countries. Advanced biotechnology has the potential to support biological weapons research. In the biological area, look for interest in technologies associated with: -- Aerobiology (study of microorganisms found in the air or in aerosol form) -- Biochemistry -- Pharmacology -- Immunology -- Virology -- Bacteriology -- Mycology -- Microbiology -- Growth and culturing of microorganisms -- Pathology (study of diseases) -- Toxicology -- Study of toxins -- Virulence factors -- Genetic engineering, recombinant DNA technology -- Identification of nucleic acid sequences associated with pathogenecity -- Freeze-drying (lyophilization) -- Fermentation technology -- Cross-filtration equipment -- High "DOP-rated filters" (e.g., HEPA filters, ULPA filters) -- Microencapsulation -- Aerosol sprayers and technology, aerosol and aerosolization technology -- Spray or drum drying technology -- Milling equipment or technology intended for the production of micron-sized particles -- Technology for eliminating electrostatic charges of small particles -- Flight training -- Crop-dusting, aerosol dissemination -- Unmanned aerial vehicle (UAV) technology -- Fuses, detonators, and other munitions technology -- Submunitions technology -- Computer modeling of dissemination or contagion -- Chemical absorption (nuclear-biological-chemical (NBC) protection)