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Conclusion: |
Increasing the number of DDFPe applications was significant in reducing the incidence of premature death in a model of permanent ischemic stroke and extending survival to scheduled sacrifice. This new PFC has previously demonstrated decreased stroke volume in the rabbit stroke model and now further indicates its abili... |
Calibration-free laser-induced plasma spectroscopy: a new frontier for material analysis, environmental protection, and cultural heritage conservation |
A new calibration free procedure (CF-LIPS) for quantitative elemental analysis of material, based on laser induced plasma spectroscopy technique, has been developed and patented by the pulsed laser spectroscopy group at IFAM/CNR (Pisa). This procedure allows for fast and reliable quantitative analysis of materials in s... |
Nowadays, almost half of the world's population is exposed to air pollution. Sources of pollutants come from energy production, households, industry, transportation, and so on. One of the targets of the sustainable development goals agenda is to pay special attention to air quality to obtain the comfort of residents in... |
This research examines how cognitive bias manifests in the design activities of graduate student design teams, with a particular focus on how to uncover evidence of these biases through survey-based data collection. After identifying bias in design teams, this work discusses those biases with consideration for the int... |
To the Editor: We read with interest the article by Robak (1) in which he reviews the recent experience with the use of monoclonal antibodies in the use of autoimmune cytopaenias. Here, we describe a patient with multicentric Castleman’s disease (MCD) complicated by autoimmune haemolytic anaemia and idiopathic thromboc... |
AIM |
To compare cyclic fatigue resistance of two geometrically similar nickel-titanium instruments, used in conditions similar to clinical use in reciprocating and continuous rotary motion. |
METHODOLOGY |
Four groups of eighteen instruments each, Reciproc(®) files sizes ISO 25 and 40 (R25 and R40) and Mtwo(®) files sizes ISO 25 and 40 (M25 and M40), were tested in reciprocating and continuous rotary motion, employing a novel experiment device. An artificial root canal (diameter, 1.4 mm; angle of curvature, 60 °; and cur... |
RESULTS |
Mean time to fracture was 34.44 ± 8.58 min for R25 in reciprocation motion, 35.77 ± 4.82 min for R40 in reciprocation motion, 12.15 ± 1.74 min for M25 in continuous rotary motion and 13.27 ± 2.02 min for M40 in continuous rotary motion, whereas 28.52 ± 3.27 min for R25 in continuous rotary motion, 23.87 ± 1.52 min for ... |
CONCLUSION |
Reciprocating movement increased the cyclic fatigue resistance of NiTi instruments.Experiments with the One-atom-maser |
There are only fistful of systems in physics that can be described by an exact theory from first principles and, at the same time, can be investigated under experimental conditions approaching the idealized theoretical ones. |
The one-atom-maser or micromaser provides such an example, making a detailed study of the fundamental properties of the atom-field interaction possible. The situation realized in a micromaser is very close to the ideal case of a single two-level atom interacting with a single quantized mode of a cavity field. |
In the micromaser the atoms have a dual purpose of both pumping the field and also probing it via measurements of the outgoing atoms. Any other means of measuring the field inside the resonator has the detrimental effect of lowering its Q-factor and thereby the photon storage time. The long photon storage time of the r... |
The behavior of atoms in a cavity is governed by the oscillatory exchange of energy between the atoms and the field, which is called Rabi oscillation. For cavity fields in the vacuum and few photon number states (Fock states), Rabi oscillations have been measured in the past. To prevent thermal effects from polluting t... |
The observed contrast of Rabi oscillations can be considered as a figure of merit for the experimental resolution of quantum features of a maser field. Therefore, a high resolution in the measurements of Rabi oscillations is crucial. |
This thesis describes the methods and improvements applied to enhance the resolution of Rabi oscillations by a factor of 8. The following upgrades and developments proved to be crucial in this work: |
1) The base temperature of the cryogenic system was lowered to 0.3 K, i.e. one third of the original value. At the same time, the time during which the system remains at the base temperature was improved by almost of an order of magnitude (to more than 12 h). |
2) For the promotion of the atoms to the Rydberg regime new three-step diode laser setup was constructed. The excitation efficiency compared to the old dye laser was increased by two orders. Using top-of-fringe stabilization with new spectroscopic methods, specially designed error detection and feedback schemes as well... |
3) The flexibility of using the three step excitation allows to excite different maser states and for the first time to investigate pure maser transition. |
4) Various improvements on the atomic oven and the channeltron detection unit led to the reliable and stable production and detection of the atomic beam. Observed distribution of the atomic beam statistics reaches to within 6% the Poisson limit which is expected in the absence of experimental imperfections. |
5) New developed techniques in magnetic field compensation allow to perform such measurements with two orders of magnitude better accuracy compared to the previous experiments. |
To demonstrate the new capabilities of the apparatus and to apply its improved resolution of quantum fields we performed a previously impossible in-depth analysis of mean photon number and the atomic inversion produced by a micromaser for various detunings between the cavity- and atomic resonance frequency.Taxonomic ma... |
Abstract The family Tabanidae includes horse flies (referred to flies of genus Tabanus), deer flies (Chrysops) and clegs (Haematopota). They are mainly popular in this tropical climate for their disease-causing abilities and one of those important disease that even may lead to fatal consequences in cattle animals is Su... |
Convolutional Neural Networks (CNNs) are becoming increasingly popular in deep learning applications, e.g. image classification, speech recognition, medicine, to name a few. However, the CNN inference is computationally intensive and demanding a large among of memory resources. In this work is proposed a CNN inference ... |
Comparing homologous enzymes adapted to different thermal environments aids to shed light on their delicate stability/function trade-off. Protein mechanical rigidity was postulated to secure stability and high-temperature functionality of thermophilic proteins. In this work, we challenge the corresponding-state princip... |
1. The ability of the rat intestinal microflora to deacylate or dealkylate a large number of drugs and related compounds during anaerobic incubation in vitro has been explored.2. Evidence was obtained that the rat microflora is able to deacylate phenacetin and certain related compounds to the corresponding primary amin... |
Oxygen quenching of the luminescence of mononuclear and dinuclear Ir(III) cyclometalated complexes immobilized in the pPEGMA matrixes has been studied. Linear Stern-Volmer plots, even when experiments at different emission wavelengths have been performed, were evidenced. Despite the different luminescence lifetimes of ... |
Aqueous zinc ion batteries are appealing for large scale electrochemical energy storage systems due to their inherent low cost, innate safety, and environmentally friendly nature. However new materials, electrolytes and electrode fabrication approaches are required to achieve AZIB with the needed lifetime for grid scal... |
Prolonged sitting is associated with an increased risk of cardiovascular disease, type 2 diabetes, and cancer, regardless of physical activity levels, a systematic review has shown. It recommended that people who think that they exercise enough should be made more aware of the dangers of sitting for long periods. |
Current Canadian guidelines recommend that adults take 150 minutes of physical exercise a week in bouts of at least 10 minutes to reduce their risk of cardiovascular disease, type 2 diabetes, and some cancers. But …Hirni: Segmentation of Brain Tumors in Multi-parametric Magnetic Resonance Imaging Scans |
Glioma is a type of tumor that develops in the brain and causes cancer in nervous system. They are normally associated with a bad prognosis due to its heterogeneity and the difficulty to resect them. Taking this into account, we developed an algorithm capable of segmenting the brain into four parts: background (brain w... |
Ischemia-reperfusion (I/R) injury has a complex pathophysiology resulting from a number of contributing factors. Therefore, it is difficult to achieve effective treatment or protection by individually targeting the mediators or mechanisms. Our aim was to analyze the individual and combined effects of N-acetylcysteine (... |
Objectives: Cervical cancer screening by visual inspection with acetic acid (VIA) is a widely used alternative to cytology in developing countries. This study aimed to evaluate risk factors associated with a positive VIA test and with cervical high-grade lesions on cytology. Methods: We conducted a large cross-sectiona... |
This paper provides a proof-of-concept demonstration of the potential benefit of using logical implications for detection of combinational hardware trojans. Using logic simulation, valid logic implications are selected and added to to the checker circuitry to detect payload delivery by a combinational hardware trojan. ... |
DOI: 10.1002/adma.201501408 Here, we describe the fi rst highly sensitive, wearable, and multimodal all-carbon skin sensors using hierarchically engineered elastic carbon nanotube (CNT) fabrics, which is capable of simultaneously and effectively sensing external multi-stimuli such as tactile, touch, temperature, humidi... |
This study sought to establish factors that contributed to child marriages in two Chegutu urban and peri-urban clusters of Zimbabwe. It used the mixed research method and the descriptive survey design. Five primary schools and five secondary schools were purposively sampled out of a total of forty schools in the cluste... |
Feasibility design of a damper based on superelastic shape memory alloys (SMAs) is presented. The design wants to develop a passive vibration insulator for the Contamination Assessment Microbalance instrument, a quartz crystal microbalance for monitoring and measuring contamination in space environment. The ability of ... |
Professional values and behaviours are intrinsic to all medical practice yet remain one of the most difficult subjects to integrate explicitly into a curriculum. Professionalism in the twenty-first century raises challenges not only for the adaptation of the medical training programme to changing societal values but al... |
Two new schemes for identifying field lines involved in eruptions, the r-scheme and q-scheme, are proposed to analyze the eruptive and confined nature of solar flares, as extensions to the original r m scheme proposed in Lin et al. Motivated by three solar flares originating from NOAA Active Region 12192 that are miscl... |
An "on water" hydroquinine-based primary amine-benzoic acid organocatalyst system was found to be best suited to produce 3,4,5-trisubstituted cyclohexanones with a nitro group in the 4-position from enones and nitro dienes under ambient conditions in good yield, with good diastereoselectivity, and with excellent enanti... |
PURPOSE |
To uncover design principles for the abutment-fixture complex that reduce the stress concentration on the bone. |
METHODS |
A 3-dimensional finite element model was used to vary shape, elasticity, and connectivity of the abutment-fixture complex. We compared peri-implant bone stress of these designs. |
RESULTS |
Peri-implant bone stress was increased when the abutment could slide frictionless along the rim of the fixture, allowing the abutment to "lean into" the fixture rim and transfer loads near the bone crest. Conversely, bone stress was reduced when no motion was allowed (or no contact was made at all) between the abutment... |
Tinea capitis is a common dermatophyte infection affecting scalp and hair of pre-pubertal children. With introduction of Griseofulvin in 1958, there has been considerable improvement in the treatment of tinea capitis. A seven-year-old male child was brought to the dermatology clinic. He presented with diffuse white sca... |
Underweight is a nutritional status of toddlers characterized by a lack of weight based on anthropometric index weight-for-age. In Indonesia, the anthropometric index is recorded on a KMS (Card Towards Health) which refers to WHO-2005 Standard Growth Chart (WHO-2005 SGC). The toddler samples used by WHO-2005 SGC, i.e.,... |
EDITOR—Looking at statistics will not add anything if managers are aware of problems that place patients at risk but fail to act, as happened in the Ledward case.1 2 Jean Ritchie QC chaired the inquiry into Rodney Ledward and found that as early as 1986, 10 years before his suspension, senior management was aware of Le... |
As real options analysis (ROA) is being applied to increasingly complex information technology (IT) investment problems, a concern arises over the use of heuristic ROA models that are simpler to apply but can produce overvaluations. A good example is the application of a heuristic nested variation of the Black-Scholes ... |
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