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The ATLAS experiment at the Large Hadron Collider (LHC) will face the challenge of efficiently selecting interesting candidate events in pp collisions at 14 TeV centre-of-mass energy, whilst rejecting the enormous number of background events. The High-Level-Trigger (HLT = second level trigger and Event Filter), which is a software based trigger will need to reduce the first level trigger output rate of ∼75 kHz to ∼200 Hz written out to mass storage. In this paper an overview of the steering mechanism of the HLT is given. The HLT Steering is responsible for the schedulling of algorithms and for the global event trigger decision evaluation. The concept of step-wise and seeded selection strategy implemented by the steering will be presented. Integration of large number of trigger menus and sophisticated physics selection strategies will also be discussed. The electron and photon menus will be described to demonstrate that the trigger is well adapted for the physics program at the LHC. [ABSTRACT FROM AUTHOR]

Individual monitoring regulations in Switzerland are based on the ICRP60 recommendations. The annual limit of 20 mSv for the effective dose applies to the sum of external and internal radiation. External radiation is monitored monthly or quarterly with TLD, DIS or CR-39 dosemeters by 10 approved external dosimetry services and reported as Hp(10) and Hp(0.07). Internal monitoring is done in two steps. At the workplace, simple screening measurements are done frequently in order to recognise a possible incorporation. If a nuclide dependent activity threshold is exceeded then one of the seven approved dosimetry services for internal radiation does an incorporation measurement to assess the committed effective dose E50. The dosimetry services report all the measured or assessed dose values to the employer and to the National Dose Registry. The employer records the annually accumulated dose values into the individual dose certificate of the occupationally exposed person, both the external dose Hp(10) and the internal dose E50 as well as the total effective dose E = Hp(10) + E50. Based on the national dose registry an annual report on the dosimetry in Switzerland is published which contains the statistics for the total effective dose, as well as separate statistics for external and internal exposure. [ABSTRACT FROM AUTHOR]

This is a balance sheet of the medical service in la Chaux-de-Fonds schools for the last five years (1975-1979). The activities of the School Medical Service (SMS) are clinical and paraclinical examinations, immunizations, and tuberculin tests, as well as health information. The number of students in three examined grades (1, 4, and 9) varies over the years, with a tendency of going down in the first grade since 1978. The following anomalies are checked and compared between grades and years; overweight, systolic murmurs, hernias, alterations of the tonsils and lymph glands, deviations of the vertebral column, genital anomalies in boys, age of puberty, troubles in visual and auditory acuity (the last being measured by audiometry), blood pressure troubles in students in the 9th grade. In that grade, paraclinical examinations such as ECG, pulmonary function, and blood groups are carried out. Students of that grade are questioned about their personal habits and previous illness. Immunizations and tuberculin tests done by the SMS are discussed. Health information its evolution are mentioned. In conclusion, one can say that the purpose of the SMS is promotion of school children's health during the compulsory school period.