Black Ball Research Articles

흑색화약과 쇠구슬을 이용하는 파이프형 사제총기류의 위험성 평가

흑색화약과 쇠구슬을 이용하는 파이프형 사제총기류의 위험성 평가

Do Not Draw a Black Ball from the Justice Lottery

Do Not Draw a Black Ball from the Justice Lottery

"Take It Out on the Floor": Experiences of Violence Among Black LGBT House and Ball Community Youth in a Rust Belt City.

Black, lesbian, gay, bisexual, and transgender (LGBT), individuals experience higher rates of violent victimization compared to their cisgender heterosexual counterparts over their life course. Among Black LGBT people, witnessing and experiencing violence have been related to poor health outcomes, including depression, risky sexual behavior, substance use, and lower engagement in healthcare services. We engaged in research to better understand the effects of violence experienced by the Black LGBT youth community. We conducted a qualitative, phenomenological study focused on the causes of violence occurring in the lives of Black LGBT youth engaged in a recreation-based community health program. The study consisted of four focus groups with Black LGBT youth (N = 24) and in-depth individual interviews with medical and social service providers who work with Black LGBT youth (N = 4). Data analysis presented three themes: (1) causes of violence, (2) the context of intracommunity violence, and (3) solutions to violence. The first theme describes the reasoning, motivation, or explanation for violence experienced by the Black LGBT youth community. The second theme, the context of intracommunity violence, describes how violence occurs specifically within Black LGBT young adult communities. The third theme, solutions to violence, describes the recommendations for addressing, reducing, and/or eliminating violence within the Black LGBT youth community. Our findings highlight the need for safe spaces, culturally-relevant services, and trusted figures for Black LGBT young adults, which can serve as mechanisms for mitigating violence.

Field Study of thermal comfort of indoor fitness places in cold region

A healthy body is the foundation of everything. The indoor environment comfort of fitness places has been paid more and more attention. However, there is a lack of relevant standards for the thermal environment of indoor sports and fitness venues in China, especially the research on the indoor thermal environment in different seasons. Therefore, in our study, physical environment parameters such as indoor temperature and humidity, black ball temperature, air flow rate and CO2 concentration in 9 indoor fitness places in Xi ‘an in different seasons were measured on site. At the same time, a subjective questionnaire survey was conducted on thermal sensation and acceptability of the people who were exercising in the fitness places. Through subjective questionnaire analysis, respondents generally have a high degree of satisfaction and acceptance of temperature, and the average thermal comfort vote is the highest when the indoor temperature is 17.9-23.9°C. In addition, the thermal comfort of different sports in the same space also has certain differences. The fitness people indoor have lower satisfaction with air flow and air quality. Based on the study of the factors affecting indoor thermal comfort, this paper puts forward the improvement strategies for improving indoor thermal comfort, and provides scientific basis for the design and operation of fitness venues.

Investigation and performance analysis of solar still with energy storage materials: An energy- exergy efficiency analysis

Researchers have attempted different Energy storage materials (ESM) in solar stills (SS) to improve distillate yield. In this experimental work, an attempt was made to increase the distillate yield & efficiency of SS, using good absorbing and heat transfer capacity of ESM. A comparison was made between a conventional solar still (CSS) and a solar still with energy storage materials (SSWESM) in this experiment. Different energy storage materials like black color glass ball (BCGB), black granite (BG) and white marble stone (WMS) were used in equal quantity during experimental work. CSS and SSWESM had daily distillate yield of 1.4 kg/m2 and 2.5 kg/m2, respectively. The ESM boosts water evaporation during the day and releases heat at night, resulting in a higher distillate yield than CSS. Meanwhile, the exergy efficiency (ƞexe) of CSS and SSWESM were 4.99% and 12.55% respectively. Also the SSWESM gives 72.6% more daily efficiency (ƞ) than CSS.

The Effectiveness of Malaise Traps, H-Traps, and Sticky Traps for Collecting Horseflies (Diptera: Tabanidae)

The Effectiveness of Malaise Traps, H-Traps, and Sticky Traps for Collecting Horseflies (Diptera: Tabanidae)

VSC®-8000/HS- A Robust Tool for Differentiation of Overlapped Black Pen Inks in Fraudulent Documents

Contemporary advancement and digitalization of technology has made analysis of ink extremely challenging. Selecting the best technique for ink analysis is the need of the hour. The latest version of Video spectral comparator i.e. VSC®- 8000/HS has a vast horizon of features such as multi-spectral light sources, database of currencies and passports of different countries and even micro-spectrometer for composition analysis. The present study focuses on determining the efficacy and capability of light sources of varied spectrum and spectrometer for the examination of black ball, gel and fountain pen inks particularly in questioned under scrutiny written with hand. VSC®-8000/HS have demonstrated to be substantially efficient, robust and an exhaustive nondestructive technique for analysis of documents serving as evidence which have been manipulated including obliterations, additions or overlapping of two or more black ball or fountain pen inks. However, the technique did not provide effective results for black gel pen inks in contrast to black ball and fountain pen inks. Nonetheless, it can effectively harmonize with the standard workflow of a forensic document examiner to ensure qualitative and quantitative facts and figures for the expert testimony.

PLS-DA and infrared spectroscopy based rapid and non-destructive discrimination of black ball and gel pen inks for forensic application

In the Questioned Document, the examination of ink is crucial scientific evidence to discern the difference between genuine and forged documents. The document examination which is examined by physical and chemical analysis of ink involves the matching of the source of writing material used to fabricate the document of ink. In this study, fifty black ink samples (25 ball-point and 25 gel-point pens) are used. These ink samples are analyzed with Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy conjoined with chemometric method i.e. Principal Component Analysis (PCA) and PLS-Discriminant Analysis (PLS-DA). The spectroscopic discrimination is determined by the absence or presence of particular peaks or bands in the fingerprint region of black ink samples. The first-order derivative graphs are used for spectral characterization of ink samples. PCA reduces the dimensionality of large datasets into small number of independent Principal Components and increases interpretability but at the same time minimizes the data information loss. The utilization of the PLS-DA algorithm gives 100 % accuracy to differentiate two classes of black ink samples. The ROC curve value of the PLS-Discrimination Analysis model is 1 which means 100 % sensitivity and specificity. This non-destructive study is an analytical approach that helped to maintain the spectral library based on spectroscopic results of all fifty samples. The adequacy of the PLS-Discrimination Analysis model is checked by running a blind test of ten unknown samples.

THE TIME BALLS OF MAURITIUS

The time ball service at Port Louis, Mauritius started in April 1833, six months before the Greenwich service. It was established by John Augustus Lloyd who had been appointed Surveyor-General and Civil Engineer in 1831. He was a man of energy and initiative who soon developed a well-equipped observatory and a time service. His chosen arrangement, described in a presentation by Sir John Herschel in London during 1836, was unlike the design for Greenwich. It used a stationary black ball on a white background behind a shutter whose complete closure, not the moment of release, signalled the exact time. Lloyd departed Mauritius in 1849, leaving a legacy of engineering and astronomical achievements. There is some evidence that a conventional time ball had been erected on the roof of the old observatory, possibly for experimental purposes. The time service appears to have deteriorated through the 1850s and 1860s, with only an intermittent flag signal for an extended period, although a new time ball had been erected high on Signal Mountain in 1866. It was rejuvenated when the Royal Alfred Observatory became operational in 1874. Lists of time signals from 1880 onwards include a large black ball on Signal Mountain. A smaller white ball with a larger drop height was introduced as the new principal signal near the Port Office in March 1907. Both time balls appeared in some international lists up to 1945, but publications in Mauritius have indicated much earlier withdrawal of the time ball on Signal Mountain.

The 1833 time ball at Port Louis, Mauritius: the forgotten service for chronometer calibration

The time ball service at Port Louis, Mauritius started in April 1833, six months before the Greenwich service. It was established by John Augustus Lloyd who had been appointed Surveyor-General and Civil Engineer in 1831. His chosen time ball arrangement, described in a lecture by Sir John Herschel in London during 1836, used a stationary black ball on a white background behind a shutter whose complete closure, not the moment of release, signalled the exact time. Lloyd departed Mauritius in 1849. The time service appears to have deteriorated through the 1850s and 1860s, with only an intermittent flag signal for an extended period, although a conventional time ball had been erected high on Signal Mountain in 1866.

Exclusive Image Gallery on Human Spinal Cord Regeneration-Clinical Image-31

Evolution of the attractor layout of bladder functioning induced by learning transfer from movements to bladder functions upon CDT. The region around each local minimum of the potential landscape acts like a well that weekly traps the system into a coordinated state. Black balls correspond to stable minima of the potential. With learning, the pattern ‘spasticity of the external bladder sphincter’ vanishes and the patterns for bladder functioning (‘synergy’ and dyssynergia’) appear anew and gain their physiologic stability (physiologic deepness of each basin of attraction). The corresponding attractor layout for physiologic bladder functioning is given. Fluctuation of pattern state (the black ball) (C), and their decrease (F), due to the impairment of phase and frequency coordination of neuron firing, is pictured in ‘C’ and ‘F’ by long and short arrows. Dotted and dashed lines indicate the re-occurrence of bladder sensation. Note that more than two years of optimal continuous CDT were needed for bladder repair.

Pólya urns with immigration at random times

We study the number of white balls in a classical Pólya urn model with the additional feature that, at random times, a black ball is added to the urn. The number of draws between these random times are i.i.d. and, under certain moment conditions on the inter-arrival distribution, we characterize the limiting distribution of the (properly scaled) number of white balls as the number of draws goes to infinity. The possible limiting distributions obtained in this way vary considerably depending on the inter-arrival distribution and are difficult to describe explicitly. However, we show that the limits are fixed points of certain probabilistic distributional transformations, and this fact provides a proof of convergence and leads to properties of the limits. The model can alternatively be viewed as a preferential attachment random graph model where added vertices initially have a random number of edges, and from this perspective, our results describe the limit of the degree of a fixed vertex.

Search for black holes and sphalerons in high-multiplicity final states in proton-proton collisions at sqrt{s}=13 TeV

A search in energetic, high-multiplicity final states for evidence of physics beyond the standard model, such as black holes, string balls, and electroweak sphalerons, is presented. The data sample corresponds to an integrated luminosity of 35.9 fb−1 collected with the CMS experiment at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV in 2016. Standard model backgrounds, dominated by multijet production, are determined from control regions in data without any reliance on simulation. No evidence for excesses above the predicted background is observed. Model-independent 95% confidence level upper limits on the cross section of beyond the standard model signals in these final states are set and further interpreted in terms of limits on semiclassical black hole, string ball, and sphaleron production. In the context of models with large extra dimensions, semiclassical black holes with minimum masses as high as 10.1 TeV and string balls with masses as high as 9.5 TeV are excluded by this search. Results of the first dedicated search for electroweak sphalerons are presented. An upper limit of 0.021 is set at 95% confidence level on the fraction of all quark-quark interactions above the nominal threshold energy of 9 TeV resulting in the sphaleron transition.

A new fixed attachment system using no screws, no cement for immediate load full‐arch restorations

Background An immediately loaded screw-retained implant prosthesis for the fully edentulous arch is often provided by retrofitting the patient's existing denture and converting to a provisional prosthesis. Converting a denture to a fixed solution by bonding temporary cylinders into the denture base, requires grinding holes in the denture and is often a time-consuming process with risk of fracture during the transitional healing period. Aim/Hypothesis Evaluate 2–4 year follow-up of a novel screw-and-cementless fixed attachment system which utilizes PEEK Retentive Balls to fixate and retain the full-arch temporary as well as definitive prostheses. Moreover, to analyse the treatment time for fabrication of the provisional and definitive prostheses compared to a screw-retained protocol. Material and Methods Study evaluated thirteen edentulous patients treating 6 full-arch mandibles with 4 implants and 7 maxillae, 3 with 4 implants, 4 with 6 implants totalling 60 implants placed. Conversion of the patients’ dentures to a fixed full-arch bridge was done immediately after surgery. A novel spherical Abutment (LOCATOR F-Tx) was torqued into place providing a snap-fit connection of the Denture Attachment Housing (DAH) to the Abutment allowing the DAH to pivot up to 20°, eliminating the need for angled abutments. During chairside pickup, the DAH with an internally threaded Black Processing Ball, was picked up into the denture. The fixed denture was removed, trimmed and polished. Retentive Balls were threaded into the DAH. The fixed provisional prosthesis was snapped into place. A time comparison between the novel system and screw-retained protocol was performed in 3 cases. Final Prosthesis - After healing, an abutment-level impression was taken, a definitive titanium acrylic or zirconia prosthesis was fabricated with the DAH fixated to the prosthesis. High-Retention Balls, or in a combination with Medium Balls, were selected for retention of the final fixed prosthesis. Results No implants were lost during the follow-up period (mean 37 months, range 26–47 months). Mean bone loss at 2 years follow-up was 0.32 mm. No temporary prostheses fractured during healing time. One temporary prosthesis dislodged during the healing period. One definitive prosthesis dislodged after final seating. Medium Retention Balls were replaced with High Retention Balls and no further dislodgement occurred during follow-up. In three cases, the time required to construct a fixed temporary prosthesis from an existing denture using the LOCATOR F-Tx protocol totalled 65 minutes compared to 90 minutes for screw-retained. Additional time saved during the remainder of treatment totalled 45 minutes. Conclusions and Clinical Implications Within the limit of this study the use of a no-screw no-cement abutment is a viable option for full-arch rehabilitation. Treatment time for fabrication of temporary and definitive prosthesis was reduced. Prostheses with no coping screws and no access channels to fill contributed to the lack of complications, and no fractures of the provisional or final restorations were reported. In addition, patients reported that the Attachment System provided more pleasing aesthetic results.

Egalitarianism under Severe Uncertainty

In the spring of 2009, a novel strain of the H1N1 influenza virus, containing a never before witnessed combination of gene segments from human influenza, two forms of swine influenza, and avian influenza, 1 was declared a global pandemic. The UK Government had to decide whether to undertake, at a cost of £1.2 billion (USD 1.9 billion at the time, equivalent to 1 percent of that year’s health budget), an extensive set of preparatory measures, including the purchase of both antiviral medication and a novel vaccine in quantities sufficient to cover the entire UK population, or whether instead to take substantially less costly measures, which would involve having only a limited supply of these medicines and vaccines at hand.2 The possible.

Imaging of Juvenile Hip Conditions Predisposing to Premature Osteoarthritis-Erratum.

HomeRadioGraphicsVol. 38, No. 2 PreviousNext ErrataFree AccessImaging of Juvenile Hip Conditions Predisposing to Premature Osteoarthritis—ErratumCarl Kraus, Rama S. Ayyala, Jonathan K. Kazam, Tony T. WongCarl Kraus, Rama S. Ayyala, Jonathan K. Kazam, Tony T. WongCarl KrausRama S. AyyalaJonathan K. KazamTony T. WongPublished Online:Mar 12 2018https://doi.org/10.1148/rg.2018174019MoreSectionsPDF ToolsImage ViewerAdd to favoritesCiteTrack CitationsPermissionsReprints ShareShare onFacebookTwitterLinked In Originally published in:RadioGraphics 2017;37(7):2204–2205 • https://doi.org/10.1148/rg.2017170067Imaging of Juvenile Hip Conditions Predisposing to Premature OsteoarthritisCarl Krsaus, Rama S. Ayyala, Jonathan K. Kazam, Tony T. WongErratum in:RadioGraphics 2018;38(2):662 • https://doi.org/10.1148/rg.2018174019Supplemental presentation, slide 8: The line beginning with “Acetabular line” should read as follows: “Acetabular line: Drawn connecting the superolateral acetabular roof to the ipsilateral triradiate cartilage (angle formed with horizontal line should be less than [not greater than] 30°).”Article HistoryPublished online: Mar 12 2018Published in print: Mar 2018 FiguresReferencesRelatedDetailsCited ByMedium-term outcomes of total hip arthroplasty in juvenile patientsFrancescoLuceri, IlariaMorelli, Carlo MariaSinicato, AlbertoDella Grazia, FabioVerdoni, NicolaMaffulli, Giuseppe M.Peretti, DomenicoCurci2020 | Journal of Orthopaedic Surgery and Research, Vol. 15, No. 1Accompanying This ArticleImaging of Juvenile Hip Conditions Predisposing to Premature Osteoarthritis: Pediatric ImagingNov 13 2017RadioGraphicsRecommended Articles Hip Imaging in Athletes: Sports Imaging SeriesRadiology2016Volume: 280Issue: 2pp. 351-369Developmental Hip Dysplasia Diagnosis at Three-dimensional US: A Multicenter StudyRadiology2018Volume: 287Issue: 3pp. 1003-1015Radiography, CT, and MRI of Hip and Lower Limb Disorders in Children and AdolescentsRadioGraphics2019Volume: 39Issue: 3pp. 779-794Relationship of Trochlear Morphology and Patellofemoral Joint Alignment to Superolateral Hoffa Fat Pad Edema on MR Images in Individuals with or at Risk for Osteoarthritis of the Knee: The MOST StudyRadiology2017Volume: 284Issue: 3pp. 806-814Imaging of Sports-related Injuries of the Lower Extremity in Pediatric PatientsRadioGraphics2016Volume: 36Issue: 6pp. 1807-1827See More RSNA Education Exhibits Developmental Dysplasia of the Hip: Clinical and Imaging Findings for Early Diagnosis and TreatmentDigital Posters2018To Correctly Understand the Graf Classification—Recognize the Relationship of the Black Ball to the White WallDigital Posters2020Adult Hip Dysplasia - An Updated Imaging ApproachDigital Posters2020 RSNA Case Collection Developmental hip dysplasia RSNA Case Collection2021Osteoarthritis of L hipRSNA Case Collection2020Patella FractureRSNA Case Collection2020 Vol. 38, No. 2 Metrics Altmetric Score PDF download

Jackie Robinson, the Anatomical Record, and the Gift of Building Bridges

Jackie Robinson, the Anatomical Record, and the Gift of Building Bridges

Rosa Parks con Judith Butler: performatividad individual y acción colectiva

El presente artículo se desarrolla en dos direcciones temporales opuestas. En la primera recurro a la contracultura drag negra y latina de los Estados Unidos para releer la negativa de Rosa Parks a ceder su asiento en el autobús. A continuación, se plantea una genealogía queer de los usos de la teatralidad en las formas contemporáneas del activismo urbano. A partir del encuentro entre ambas líneas temporales defiendo, en diálogo con la obra reciente de Judith Butler, la importancia de la dimensión performativa de las intervenciones individuales en espacios de protesta para entender el alcance movilizador de la acción colectiva.

Mate-searching behavior of the black chafer Holotrichia kiotonensis (Coleoptera: Scarabaeidae): identification of a sex pheromone, and male orientation behavior controlled by olfactory and visual cues

In the black chafer Holotrichia kiotonensis Brenske (Coleoptera: Scarabaeidae), mating behavior was observed between 1940 and 2010 hours at < 0.1 lx in both the laboratory and the field. In the laboratory, an ether extract of female abdominal glands induced a series of pre-mating behaviors such as short-distance orientation and abdominal bending. When the extract was fractionated by silica gel column chromatography, the active fraction was eluted with 50% ether in hexane and 100% ether. Gas chromatography–mass spectrometry analysis revealed that both active fractions contained anthranilic acid (2-amino-benzoic acid) as a major compound. The amount of this compound was determined to be ca. 600 ng/female by high performance liquid chromatography analysis with a fluorescence detector. In the field, male chafers were observed to land on cotton balls impregnated with 10 mg of authentic anthranilic acid. When a white ball treated with anthranilic acid was placed 2–10 cm away from an untreated black ball, males were observed to land significantly more frequently on the latter. These results suggest that males could recognize white balls below 0.1 lx and landed on black balls. When a treated black ball was placed beside an untreated black ball, more males landed on the former. The difference was significant when the distance between the two lures was 5 or 10 cm, but not significant when it was 2 cm. These observations demonstrated that anthranilic acid was the sex-attractant pheromone for the black chafer H. kiotonensis and that the males located and landed on a pheromone source by using olfaction in conjunction with visual orientation. The importance of visual orientation in this nocturnal species is discussed in comparison with the congeneric diurnal species Holotrichia loochooana loochooana.

Large deviations for generalized Polya urns with arbitrary urn function

We consider a generalized two-color Polya urn (black and white balls) first introduced by Hill et al. (1980), where the urn composition evolves as follows: let π:0,1→0,1, and denote by xn the fraction of black balls after step n, then at step n+1 a black ball is added with probability πxn and a white ball is added with probability 1−πxn. Originally introduced to mimic attachment under imperfect information, this model has found applications in many fields, ranging from Market Share modeling to polymer physics and biology.In this work we discuss large deviations for a wide class of continuous urn functions π. In particular, we prove that this process satisfies a Sample-Path Large Deviations principle, also providing a variational representation for the rate function. Then, we derive a variational representation for the limit ϕs=limn→∞1nlogPnxn=sn,s∈0,1,where nxn is the number of black balls at time n, and use it to give some insight on the shape of ϕs. Under suitable assumptions on π we are able to identify the optimal trajectory. We also find a non-linear Cauchy problem for the Cumulant Generating Function and provide an explicit analysis for some selected examples. In particular we discuss the linear case, which embeds the Bagchi–Pal Model [6], giving the exact implicit expression for ϕ in terms of the Cumulant Generating Function.