Layout and performance of RPCs used in the Argo-YBJ experiment Aielli, G.; Assiro, R.; Bacci, C. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
06/2006, Volume:
562, Issue:
1
Journal Article
Peer reviewed
The layout of the RPCs, used in the Argo-YBJ experiment to image with a high space-time granularity the atmospheric shower, is described in this paper. The detector has been assembled to provide both ...digital and analog informations in order to cover a wide particle density range with a time accuracy of 1
ns. The experimental results obtained operating the chambers in streamer mode at sea level with a standard gas mixture are presented.
Abstract Oral burns in pediatric patient are commonly due to electrical injuries, representing an important reconstructive issue even for functional than esthetic reason. Different classification, ...surgical management and even oral device were described to allow the best long-term result. In most case a multidisciplinary approach is necessary to achieve a satisfactory outcome. A severe case of pediatric oral burn with germinative teeth damage is presented, describing a multispecialist team approach that guarantee a satisfactory outcome by reconstructive surgery, careful progressive evaluation of dental and soft tissue healing and speech recovery. The use of acellular dermal substitute template within traditional reconstructive surgery had provided a good functional and esthetic result joint to valid preservation of germinative dental element as shown at long-term X-ray evaluation. Intensive rehabilitation speech program has also avoided phonetic impairment in an important speech develop period. It was so evident that the necessity of a multispecialist care in such difficult injury to achieve the best long-term result.
In a previous study, dogs experimentally infected with Dirofilaria immitis were treated with either ivermectin or doxycycline or a combination of both. The adulticide effect was significantly higher ...in the dogs treated with both drugs and was similar to that observed in dogs treated with melarsomine hydrochloride. In the present study, lung tissue samples from these dogs were evaluated for the presence of T regulatory (Foxp3+) cells by immunohistochemistry. Cells were enumerated for each dog in the four groups and compared with untreated controls. There was a significantly lower number of Treg cells in those dogs treated with a combination of both drugs when compared either to the control group or to the other groups treated with either drug alone or with melarsomine. These results suggest that successful adulticide effects of doxycycline and ivermectin are associated with a decrease in immune regulation towards the parasite.
The aim of present study is a macro evaluation of adjustment to allow homeostasis before and after frenectomy. Macro analysis was done on 7 pediatric patients tested firstly simple surface ...elettromyography (EMG) to evaluate masticatory muscles, secondly the Romberg's test to assess the posture and thirdly cephalometric analysis according to Giannì and Rocabado to assess orthodontic variations. The frenectomy was performed with diode laser (wavelength 890 nm). Pre-frenectomy EMG outcomes indicate a clear masticatory muscular imbalance with a different electrical activity compared to physiological standard values and functional basal balance. Results after frenectomy EMG show a normalization of basal values with an improvement of mandibular posture. Depending on cephalometric analysis, outcomes reveal a tendency to normalize the cervical lordosis, previously altered. Ultimately, pre-frenectomy Romberg's test shows initial instability in the static posture, which decreases after frenectomy. In conclusion, the short lingual fraenum not only has static correlations with the oral cavity but also dynamic connections with the cervical posture and muscular basal organization. So, homeostasis includes macro alterations involving muscular tone and bone position. Frenectomy could favor the restoration of the basal eutonia achieved by a natural homeostasis.
Anxiety is a relevant problem in dental practice. The Visual Analogue Scale for Anxiety (VAS-A), introduced in dentistry in 1988, has not yet been validated in large series. The aim of this study is ...to check VAS-A effectiveness in more than 1000 patients submitted to implantology. The VAS-A and the Dental Anxiety Scale (DAS) were administered preoperatively to 1114 patients (459 males and 655 females, age 54.7 ± 13.1 years). Statistical analysis was conducted with Pearson correlation coefficient, the receiver operating characteristic (ROC) curve, and McNemar tests. A close correlation between DAS and VAS-A was found (r = 0.57, P < .0001); the VAS-A thresholds of dental anxiety and phobia were 5.1 and 7.0 cm, respectively. Despite a significant concordance of tests in 800 cases (72%), disagreement was found in the remaining 314 cases (28%), and low DAS was associated with high VAS-A (230 cases) or vice versa (84 cases). Our study confirms that VAS-A is a simple, sensitive, fast, and reliable tool in dental anxiety assessment. The rate of disagreement between VAS-A and DAS is probably due to different test sensitivities to different components of dental anxiety. VAS-A can be used effectively in the assessment of dental patients, using the values of 5.1 cm and 7.0 cm as cutoff values for anxiety and phobia, respectively.
A set of preliminary test data, collected with large mass highly radiopure NaI(Tl) detectors, has been analysed by a maximum likelihood method to search for the WIMP annual modulation signature.
We report the GALLEX solar neutrino results for the measuring period GALLEX IV, from 14 February 1996 until 23 January 1997. Counting for the GALLEX IV runs was completed on 19 June 1997. The GALLEX ...IV result from 12 solar runs is 118.4 ± 17.8 (stat.) ± 6.6 (sys.) SNU (1
σ). The combined result for GALLEX I+II+III+IV, which comprises 65 solar runs, is 77.5 ± 6.2
+4.3
−4.7(1
σ) SNU. The GALLEX experimental program to register solar neutrinos has now been completed. In April 1998, GALLEX was succeeded by a new project, the Gallium Neutrino Observatory (GNO), with newly defined motives and goals.
The Sun blocks cosmic-ray particles from outside the solar system, forming a detectable shadow in the sky map of cosmic rays detected by the ARGO-YBJ experiment in Tibet. Because the cosmic-ray ...particles are positively charged, the magnetic field between the Sun and the Earth deflects them from straight trajectories and results in a shift of the shadow from the true location of the Sun. Here, we show that the shift measures the intensity of the field that is transported by the solar wind from the Sun to the Earth.
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