1,590 research outputs found
Measurement of the Intrinsic Dissipation of a Macroscopic System in the Quantum Regime
We report on the first measurements of the intrinsic dissipation in a macroscopic system cooled at very low temperature (35 mK) and operating in the quantum regime. The system under study is an rf SQUID with a high quality Josephson junction. Below 50 mK the tunneling probability of escape from a metastable well vs applied flux presents a series of maxima due to energy level quantization. From the shape of the tunneling probability we can evaluate the intrinsic dissipation related to the overall system as well as the coherence time related to the Rabi oscillations in a future macroscopic quantum coherence experiment
Lämmermast mit verschiedenen Rassen auf extensivem Grünland: erste Ergebnisse
Ziel dieser Studie ist es, die mögliche Nutzung von extensivem Grünland für die Mast von Merino-Lämmern und reinrassigen Waldschaf-Lämmern unter verschiedenen Besatzraten zu untersuchen. Während der ersten Weidemonate im Jahr 2017 wurden Merino-Lämmer unter Ausnutzung der hohen Graswachstumsintensität geweidet. Die Waldschaf-Lämmer wurden in der zweiten Hälfte der Vegetationsperiode im Jahr 2017 mit geringerer Wachstumsintensität der Weide bis zum Ende dieser Weidezeit geweidet. Beide Rassen wurden in zwei getrennten Paddocks mit unterschiedlichen Besatzraten und Graswachstumshöhen beweidet. Das gleiche Verfahren wird im Jahr 2018 wiederholt. Ergebnisse des ersten Jahres 2017 werden vorgestellt
Efectividad de la miotomía de aductores y tenotomía de psoasiliaco en la prevención de la luxación de cadera en la parálisis cerebral espástica
Se evaluaron 208 pacientes con parálisis cerebral infantil espástica, sin retardo
mental, con potencia de marcha; la edad osciló entre los 16 meses y los 13 años de edad con
un promedio de 5 años. El seguimiento fue de la 10 años, con promedio de 6,2 años. A los
que se realizó miotomía de aductores y tenotomía del psoasiliaco. Los resultados fueron valorados
con el índice de migración lateral. Los mejores resultados se logran en niños de 2 años con
8 5% de caderas reducidas.We rewiewd 208 spastic cerebral palsied patients, without mental ratardation
and with gait potential. They were 16 months to 13 years old (average 5 years). Follow-up was
1 to 10 years (average: 6,2 years). Myotomy were evaluated by lateral migration index. Best
results were obteined in children of 2 years with 85% of reducted hips
Tratamiento de la luxación congénita de cadera inveterada según la técnica de klisic
En este trabajo se valoran retrospectivamente un grupo de 15 pacientes, con edades superiores a los 6 años, afectos de luxación congenita inveterada y que fueron intervenidos (16 caderas) mediante la técnica de Klisic. El tiempo medio de seguimiento fue de 4 años. En 12 caderas se habían realizado previamente distintas técnicas quirúrgicas sin obtener resultados satisfactorios. Tras efectuar la técnica de Klisic, 11 caderas presentaban un centraje coxofemoral satisfactorio. Se objetivos necrosis epifisaria en 6 casos, aunque en 5 de ellos ya existía antes de la intervención. Valorando los resultados con una escala clínico-radiológica (Trevor y cols. 1975), se obtuvieron resultados excelentes o buenos en el 50% de los casos. En el 3 1% de los pacientes el resultado fue pobre desde el punto de vista radiológico y clínico. En conclusión, la técnica de Klisic supone una alternativa recomendable para el tratamiento de la luxación inveterada de cadera. Su indicación más adecuada sería la luxación alta con acetábulo hipoplásico.A group of 15 patients, over 6 years of age, with neglected congenital hip dislocation
(16 hips) were operated on using the Klisic''''s technique. The mean follow-up was 4 years.
Prior this surgery, 12 hips had undergone different surgical treatments without satisfactory
results. At the end of follow-up 11 hips were satisfactory reduced. In 6 cases necrosis of the
femoral head was detected, but necrotic signs were seem in the preoperative radiographs of
5 of these cases. According to a clinico-radiographic score (Trevor et al. 1975), either excellent
or good results were obtained in 50% of cases. In 3 1% the outcome was poor from both clinical
and radiographic point of view. In conclusion, Klisic''''s technique seems to be a suitable alternative
for the treatment of reglected congenital dislocation of the hip. The more proper indication
would be a high dislocation of the hip with hypoplasic acetabulum
Wearable sensor networks: A measurement study
Abstract Wearable technology is no longer science fiction. Thanks to the growing capability in the production chain to miniaturize complex electronics, a wide variety of gadgets that can be worn or included in dresses and accessories have emerged. These smart gadgets can collect data about the physical condition of the user and/or the environment providing the basis for innovative and valuable services. The main goal of this paper is to assess this context through field experiments undertaken in a testbed comprised of sensing hardware deployed on open source boards such as Arduino. Moreover, coupled with the sensing tier, we propose a proof-of-concept deployment architecture enabling a wide range of wearable sensors to collect and transmit data to a logically centralized unit
The X-ray afterglow of GRB980519
Over a total of 20 gamma-ray bursts localized with arcmin accuracies,
GRB980519 represents the 13th detected by the BeppoSAX Wide Field Cameras. An
X-ray TOO observation performed by the BeppoSAX Narrow Field Instruments,
starting about 9.5 hours after the high energy event, revealed X-ray afterglow
emission in the 0.1--10 keV energy range. The flux decay was particularly fast
with a power-law index of ~ 1.8. This is the fastest decay so far measured.
Signs of bursting activity are evident. The power-law spectral index of 2.8
(+0.6, -0.5) is quite soft but not unique among GRB afterglows.Comment: 2 pages; 3 EPS figures; requires aa.cls, psfig.sty; accepted for
publication on A&AS (Proc. of ``Gamma-Ray Bursts in the Afterglow Era'', Rome
3-6 Nov. 1998.
- …