Miracle-dz/UniFAR-FTUs huggingface dataset:
The Cygnus X region: XXIII. Is 18P87 galactic or extragalactic?

The radio source 18P87, previously thought to be a point source, has been serendipitously found to be resolved into a core-jet geometry in VLA maps. H I absorption of continuum emission (in data from the Canadian Galactic Plane Survey) appears in gas with radial velocities >+2 km/s but not in brightly emitting gas at lower radial velocity. Examination of further archival observations at radio, infrared and optical wavelengths suggests that the “obvious” interpretation as a radio galaxy requires a rather unusual object of this kind and a highly unusual local line of sight. We argue that 18P87 may be a Galactic object, a local astrophysical jet. If this is correct it could have arisen from outbursts of a microquasar (© 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
EVTQ: An Efficient Verifiable Top-k Query Processing in Two-Tiered Wireless Sensor Networks

We consider a capable and scalable network model named two-tiered sensor network which consists of regular resource-limited sensor nodes and powerful storage nodes with abundant resources. In such architecture, storage nodes are on charge of storing data collected and submitted by sensor nodes as well as processing queries from the base station. Owing to the importance role that storage nodes play, they are more vulnerable and attractive to adversaries in a hostile environment. A compromised storage node may inject fake data into and/or omit qualified data from its returned responses, which make the base station not able to obtain authentic and/or complete results. This paper proposes EVTQ, a novel and efficient verifiable top-k query processing which is capable of verifying the authentication and completeness of query result. To achieve such security features, sensor nodes are settled to submit their collected data items together with corresponding codes which embed ordered and adjacent relationships of the collect data items by a hashed message authentication coding function. Thus any attack that leads to unauthentic and incomplete query result will be detected. According to this basic idea, the data submission and query processing protocols are proposed to describe the details of EVTQ. Moreover, a hash based optimization is presented to save more communication cost. The simulation result shows that EVTQ is more efficient than the existing work in communication cost. Keywords—two-tiered wireless sensor networks; top-k query; authenticity and completeness verification; hashed message authentication coding
Emergence and spread of a human-transmissible multidrug-resistant nontuberculous mycobacterium

Global spread of aggressive mycobacteria Many mycobacteria, in addition to those causing leprosy and tuberculosis, are capable of infecting humans. Some can be particularly dangerous in patients suffering from immunosuppression or chronic disease, such as cystic fibrosis (CF). Bryant et al. observed clusters of near-identical isolates of drug-resistant Mycobacterium abscessus in patients reporting to CF clinics. The similarity of the isolates suggests transmission between patients, rather than environmental acquisition. Although this bacterium is renowned for its environmental resilience, the mechanism for its long-distance transmission among the global CF patient community remains a puzzle. Science, this issue p. 751 Near-identical isolates of Mycobacterium abscessus indicate recent chains of transmission among cystic fibrosis patients. Lung infections with Mycobacterium abscessus, a species of multidrug-resistant nontuberculous mycobacteria, are emerging as an important global threat to individuals with cystic fibrosis (CF), in whom M. abscessus accelerates inflammatory lung damage, leading to increased morbidity and mortality. Previously, M. abscessus was thought to be independently acquired by susceptible individuals from the environment. However, using whole-genome analysis of a global collection of clinical isolates, we show that the majority of M. abscessus infections are acquired through transmission, potentially via fomites and aerosols, of recently emerged dominant circulating clones that have spread globally. We demonstrate that these clones are associated with worse clinical outcomes, show increased virulence in cell-based and mouse infection models, and thus represent an urgent international infection challenge.
Mechanical and Spectroscopic Analysis of Retrieved/Failed Dental Implants

The purpose of this study was to examine surface alterations and bone formation on the surface of failed dental implants (Straumann [ST] and TiUnite [TiUn]) removed due to any biological reason. In addition, failure analysis was performed to test mechanical properties. Dental implants (n = 38) from two manufacturers were collected and subjected to chemical cleaning. The presence of newly formed hydroxyapatite bone around failed implants was evaluated using micro-Raman spectroscopy. Scanning electron microscopy was used to identify surface defects. Mechanical testing was performed using a Minneapolis servo-hydraulic system (MTS) along with indentation using a universal testing machine and average values were recorded. A statistical analysis of mechanical properties was done using an unpaired t test, and correlation between observed defects was evaluated using Chi-square (p = 0.05). Apatite-formation was evident in both implants, but was found qualitatively more in the ST group. No significant difference was found in indentation between the two groups (p > 0.05). The percentage of “no defects” was significantly lower in the ST group (71%). Crack-like and full-crack defects were observed in 49% and 39% of TiUn. The ST group showed 11,061 cycles to failure as compared with 10,021 cycles in the TiUnite group. Implant failure mechanisms are complex with a combination of mechanical and biological reasons and these factors are variable with different implant systems.
Microstructure and Mechanical Properties of Al2024-B4C-hBN Reinforced Metal Matrix Composites

: In the present work, Al2024 MMC is processed using boron carbide [B 4 C] and h-BN particulates as reinforcement by stir casting method. B 4 C is used because of its high stiffness and hardness and h-BN is used because smooth machining properties and act as solid lubricants. Stir casting technique is gaining importance due to its easy setup, low cost, uniform dispersion of reinforcement compare to other technique. MMC is obtained by incorporation of reinforcements by keeping B 4 C 6% constant and h-BN varied as 3%, 6%, 9% to investigate mechanical properties. Microstructural study shows that the B 4 C particulates in the molten matrix forms strong matrix reinforcement interface. The mechanical properties like tensile test and hardness test are investigated for Al2024-B 4 C and h-BN reinforcedMMC. From optical metallurgical microscopic analysis uniform distribution of B 4 C and h-BN particles along the aluminium matrix is observed. The hardness of Aluminium matrix increased with addition of 3%, 6%,9% of h-BN with keeping 6% of B 4 C constant.
Laser speckle contrast imaging for measuring blood flow

When a diffuse object is illuminated with laser light, a random interference effect known as a speckle pattern is produced. If there is movement in the object, the speckles fluctuate in intensity. These fluctuations can be used to provide information about the movement. A simple way of accessing this information is to image the speckle pattern the fluctuations cause a blurring of the speckle, leading to a reduction in the local speckle contrast. Thus velocity distributions are coded as speckle contrast variations. The same information can be obtained by using the Doppler effect, but producing a two -dimensional Doppler map requires scanning: speckle imaging provides the same information without the need to scan. This paper reviews the development of laser speckle imaging, starting with the connection established between speckle fluctuations and movement in the nineteen-seventies. In the eighties, a photographic technique for monitoring retinal blood flow was developed, and ten years later a digital version was used to monitor capillary blood flow in the skin. Today, many groups around the world are either using or researching the technique, and the paper will close by presenting some of their recent results.
Elevated germline mutation rate in teenage fathers

Men age and die, while cells in their germline are programmed to be immortal. To elucidate how germ cells maintain viable DNA despite increasing parental age, we analysed DNA from 24 097 parents and their children, from Europe, the Middle East and Africa. We chose repetitive microsatellite DNA that mutates (unlike point mutations) only as a result of cellular replication, providing us with a natural ‘cell-cycle counter’. We observe, as expected, that the overall mutation rate for fathers is seven times higher than for mothers. Also as expected, mothers have a low and lifelong constant DNA mutation rate. Surprisingly, however, we discover that (i) teenage fathers already set out from a much higher mutation rate than teenage mothers (potentially equivalent to 77–196 male germline cell divisions by puberty); and (ii) ageing men maintain sperm DNA quality similar to that of teenagers, presumably by using fresh batches of stem cells known as ‘A-dark spermatogonia’.
A Cloud-Based Scheme for Protecting Source-Location Privacy against Hotspot-Locating Attack in Wireless Sensor Networks

In wireless sensor networks, adversaries can make use of the traffic information to locate the monitored objects, e.g., to hunt endangered animals or kill soldiers. In this paper, we first define a hotspot phenomenon that causes an obvious inconsistency in the network traffic pattern due to the large volume of packets originating from a small area. Second, we develop a realistic adversary model, assuming that the adversary can monitor the network traffic in multiple areas, rather than the entire network or only one area. Using this model, we introduce a novel attack called Hotspot-Locating where the adversary uses traffic analysis techniques to locate hotspots. Finally, we propose a cloud-based scheme for efficiently protecting source nodes' location privacy against Hotspot-Locating attack by creating a cloud with an irregular shape of fake traffic, to counteract the inconsistency in the traffic pattern and camouflage the source node in the nodes forming the cloud. To reduce the energy cost, clouds are active only during data transmission and the intersection of clouds creates a larger merged cloud, to reduce the number of fake packets and also boost privacy preservation. Simulation and analytical results demonstrate that our scheme can provide stronger privacy protection than routing-based schemes and requires much less energy than global-adversary-based schemes.
The potential for histological screening using a combination of rapid Raman mapping and principal component analysis

Rapid Raman mapping was carried out on 20 μm sections of oesophageal biopsy samples. Contiguous 7 μm sections were stained with haematoxylin and eosin (H&E) with histopathology provided by an expert pathologist. The step size and acquisition times were varied and the resulting spectra, principal component (PC) score maps and loads were compared. Overall mapping times were also compared to traditional Raman point mapping. The principal component loads for each of the maps were seen to be similar despite varying the acquisition time and number of spectra. Gross biochemical information was extracted showing good correlation with the H&E sections even for short overall mapping times (30–90 minutes for a 2 mm biopsy, 0.5 s acquisition time per 25.3 μm Raman pixel). This demonstrates that low signal to noise spectral maps are sufficient for the identification of histologically relevant biochemistry using principal component analysis as long as the spectral dataset is large enough. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Does HLA-Dependent Chimerism Underlie the Pathogenesis of Juvenile Dermatomyositis?1

Juvenile dermatomyositis (JDM) is a multisystem autoimmune disease that at times resembles chronic graft-vs-host disease. This led us to suggest that nonself cells may play a role in the disease process. In this study we examined the relationship between HLA genotype and the presence of maternally derived chimeric cells in JDM patients and healthy controls, and assessed immunologic activity in the chimeric cells. We identified chimeric cells more often in children with JDM (60 of 72) than in their unaffected siblings (11 of 48) or in healthy controls (5 of 29). The presence of chimerism in the JDM patients, their healthy siblings, and unaffected control children was associated with a HLA-DQA1*0501 allele in the mother (p = 0.011). Further, we show that maternally transferred chimeric T cells are responsive to the host’s (JDM childs’) lymphocytes (33.75 ± 8.4 IFN-γ-producing cells from JDM cells vs 5.0 ± 1.25 from maternal cells), and that this is a memory response. These combined data indicate that chimeric cells play a direct role in the JDM disease process and that the mother’s HLA genotype facilitates the transfer and/or persistence of maternal cells in the fetal circulation.
Transient Stability Improvement of SMIB System using Line Impedance Compensation Mode of UPFC

The effect of line impedance compensation mode of series inverter along with the voltage regulation mode of shunt inverter of UPFC is investigated for transient stability improvement of Single Machine Infinite Bus System. Four control modes like perpendicular voltage or phase angle control etc have also been discussed. The effect of line impedance mode on critical clearing time with a three phase fault on single machine infinite bus (SMIB) is examined for transient stability improvement. Simulations are performed in MATLAB/SIMULINK environment.
Electrically conductive elastic composite yarn, methods for making the same, and articles incorporating the same

An electrically conductive elastic composite yarn comprises an elastic member that is surrounded by at least one conductive covering filament(s). The elastic member has a predetermined relaxed unit length L and a predetermined drafted length of (N x L), where N is a number preferably in the range from about 1.0 to about 8.0. The conductive covering filament has a length that is greater than the drafted length of the elastic member such that substantially all of an elongating stress imposed on the composite yarn is carried by the elastic member. The elastic composite yarn may further include an optional stress-bearing member surrounding the elastic member and the conductive covering filament. The length of the stress-bearing member is less than the length of the conductive covering filament and greater than, or equal to, the drafted length (N x L) of the elastic member, such that a portion of the elongating stress imposed on the composite yarn is carried by the stress-bearing member.
FcgiOCSP: a scalable OCSP‐based certificate validation system exploiting the FastCGI interface

Certificate validation, one of the most important and complex tasks in Public Key Infrastructures, is still a challenging topic nowadays because of the scalability and complexity issues related to this process. Validation of an X.509 certificate requires checking its revocation status, either by consulting the so‐called Certificate Revocation Lists or by contacting a specific server via the Online Certificate Status Protocol (OCSP). Because more and more entities extensively need to validate the certificates used for various purposes (such as digital signature, server authentication, and secure e‐mail), the OCSP servers become overloaded. Thus, an increasing effort is currently dedicated to the creation and management of scalable certificate validation architectures. In this work, we discuss scalability challenges in OCSP‐based certificate validation, and we propose a method to evaluate the OCSP server performance in stress conditions. Next, we experimentally measure the performance, expressed in terms of response time and throughput, of some open‐source OCSP implementations. Finally, we propose and evaluate our own scalable OCSP‐based certificate validation system, named FcgiOCSP, as it exploits the FastCGI interface. Experimental results demonstrate the high performance of FcgiOCSP with respect to other OCSP implementations evaluated in this work. Copyright © 2012 John Wiley & Sons, Ltd.
A developmental study of photosystem I peripheral chlorophyll proteins.

An isolated "native" photosystem I (PSI complex) contains three spectral populations of chlorophyll a antennae (Mullet, Burke, Arntzen 1980 Plant Physiol 65: 814-822). It was hypothesized that nearly one-half of these antennae ( approximately 45 Chl/P(700)) are associated with polypeptides of 21,500 to 24,500 daltons. The present study utilizes two developmental systems to verify this association.Chloroplasts were isolated from a Chl b-less barley mutant and from partially-developed cucumber cotyledons (greened under intermittent illumination [ImL] chloroplasts) and were compared to control chloroplasts isolated from wild-type barley and mature cucumber. Both the mutant and ImL chloroplasts exhibited a long wavelength fluorescence maximum at 724 nanometers at 77 K as compared to 735 to 738 nanometers emission maximum in the respective controls. Both the mutant and ImL chloroplasts were deficient in polypeptides of 21,500 to 24,500 daltons which were present in control membranes and in PSI fractions isolated from control membranes. In light-induced maturation of the ImL cucumbers, the synthesis of polypeptides in the 21,500 to 24,500 molecular weight range paralleled the appearance of PSI Chl species fluorescing at long wavelength ( approximately 735 nm). The PSI spectral properties of the control membranes were retained in isolated PSI particles containing 100 to 120 Chl/P(700) (PSI-110). Detergent extraction of PSI-110 removed polypeptides of 21,500 to 24,500 daltons plus approximately 45 Chl/P(700). The antennae-depleted PSI particle mimics PSI properties exhibited by incompletely differentiated mutant or ImL chloroplasts.
Records Management und Total Quality Management: Ein noch unberührtes Forschungsgebiet?

Im Aufsatz wird der Frage nachgegangen, inwiefern Records Management (RM) einen gangbaren Weg darstellt, bestimmte Bereiche des Quality Management respektive des Total Quality Managements (TQM) abzudecken, und zwar solcherart, dass die Mitarbeitenden in ihrem Alltagsgeschäft gezielt unterstützt werden. Aus dem Angebot verschiedener TQM-Modelle fiel die Wahl auf das Modell der European Foundation for Quality Management (EFQM), da dieses in den letzten Jahren eine große Verbreitung gefunden hat. Interessant ist dieses Modell insofern, als dass es bei der konkreten Umsetzung sehr viel Spielraum für die Kreativität und Eigenständigkeit einer Organisation lässt. Die den Aufsatz abschließenden Folgerungen verweisen auf die große Bedeutung der Integration eines Records Management-Ansatzes in Total Quality Management.
Downlink Scheduling and Resource Allocation for Cognitive Radio MIMO Networks

Cognitive radio is regarded as the ideal candidate for enhancing the efficiency of spectrum usage for next-generation wireless systems. In fact, this emerging technology allows unlicensed cognitive users to transmit over frequency bands that are initially owned by license holders through the use of dynamic spectrum sharing. In this paper, we propose a novel algorithm that efficiently solves the problem of spectrum sharing and user scheduling in a cognitive downlink multi-input-multi-output system (MIMO). We study the scenario where primary receivers do not allow any interference from a multiantenna cognitive base station, which serves cognitive users. Using graph theory, we model, formulate, and develop an algorithm that finds near-optimal spectrum sharing with the objective of approaching the maximum achievable secondary sum rate. Since the formulated graph-coloring problem is shown to be NP-hard, we design a low-complexity greedy algorithm. Following, we add the well-known proportional fairness to the proposed algorithm to ensure time-based fairness and to efficiently resolve the fairness/sum rate tradeoff. The problem is also formulated as a binary integer programming problem to find the optimal coloring solution. Computer simulations show that the proposed algorithm is able to achieve near-optimal performances with low computational complexity.
CoYoT1 Clinic: Innovative Telemedicine Care Model for Young Adults with Type 1 Diabetes.

BACKGROUND Young adults with type 1 diabetes (T1D) face many challenges in managing their diabetes, resulting in suboptimal glycemic control and often loss to follow-up. Comprehensive strategies are needed to engage this population in diabetes care and improve outcomes. This pilot study investigated the feasibility and acceptability of the Colorado Young Adults with Type 1 Diabetes (CoYoT1) Clinic-an innovative clinical care model for young adults with T1D, incorporating telemedicine and peer interactions. SUBJECTS AND METHODS Forty-five patients with T1D, 18-25 years of age, participated in this study. Patients completed one routine, diabetes clinic appointment, using Health Insurance Portability and Accountability-approved, Web-based videoconferencing from a location of their choosing. The clinic visit consisted of an individual appointment with a diabetes provider and a group appointment with other young adults, facilitated by a certified diabetes educator. Patients completed a satisfaction survey and reported the time lost from school or work to complete the virtual appointment compared with time typically lost to complete a traditional, in-person, visit. RESULTS Patients reported high levels of satisfaction with the virtual clinic and high levels of perceived support from the peer interaction. Additionally, patients reported saving over 6 h from their work or school day when completing their diabetes clinic visit virtually instead of in-person. CONCLUSIONS In this cross-sectional pilot study, the CoYoT1 Clinic, incorporating Web-based videoconferencing and peer interactions, was feasible and acceptable for young adults with T1D. This model may potentially increase engagement with diabetes care in the young adult population. However, further research is needed to fully evaluate the intervention.
Design and Basic Consideration of Electromagnetic Heating Yarns with Foucault Currents for Smart Functional Fabrics

The area of smart and functional materials, in particular fabrics with electric heating, attracts the attention of researchers. The energy harvesters that convert ambient motion to electricity have greatly developed recently. The paper suggests an eddy current microscale mechanism for direct conversion from ambient motion to heat. The proposed mechanism can be used within fabrics for heating and drying moisture. The principles of eddy current heating and possible design of yarns are described. A fundamental estimation of available thermal energy has been obtained from the general basic consideration.