Digital Commons Network^™

Shortterm Optical Variability Of 4c 29.45, Aykut Özdönmez

Turkish Journal of Physics

We observed the flat-spectrum radio quasar 4C 29.45 in the BVRI optical bands for 39 nights from February 2022 to July 2022 with the T60 telescope at TÜBİTAK National Observatory (TUG) in Turkey. In this study, we aimed to study flux, color, and spectral variability on short timescales. The object was in an active (bright) phase with an average optical R-band brightness of 14.7 mag and was variable in the BVRI bands throughout the monitoring period. We analyzed the flux variability during our observation period, and the variability amplitudes in V, R, and I bands were determined to be 220%, …

Analyzes Of Algebraic Classification Of Higher Dimensional Kundt Geometries With Large D Method, Pinar Ki̇rezli̇

Turkish Journal of Physics

In this paper, classification of higher dimensional Kundt geometry is revisited as the dimension of the spacetime D→∞ . In addition to previous studies, in order to Kundt geometry becomes algebraically special spacetime obligatory conditions are determined. Additionally, Type II, Type III, Type N, Type O and Type D Kundt geometries are explicitly analyzed. Classification of several metrics such as pp-waves, non-gyratonic Kundt metric and VSI spacetime, which are well-known subclasses of Kundt geometry are studied.

Gold Thin-Film Based Narrow-Band Perfect Absorbers For Near-Ir Frequencies, Serap Aksu

Turkish Journal of Physics

Perfect absorbers have received significant attention due to their tunable and extraordinary absorptive behaviour of light at selected wavelenghts. Such absorption can be achieved by the means of nanostructured materials with various types of flexibility. Despite these advantages nanofabrication is a challenging process. In this study, we manufacture and characterize a gold thin-film based ultra narrow-band perfects absorber that does not require nanostructures for full absorption of the incident light. Perfect absorption is based on Fabry-Perot interference created using a metal-insulator-metal triple layer. The fabrication involves precise deposition of a gold film (35 nm) and silicon nitride dielectric film (110-170 …

Improving The Angular Visibility Of Photopolymer-Based Reflection Holograms For Sensing Applications, Tatsiana Mikulchyk, Kevin Murphy, John Walsh, Suzanne Martin, Dervil Cody, Izabela Naydenova

Articles

Volume reflection hologram-based sensors are designed to visibly change colour in response to a target stressor or analyte. However, reflection holograms fabricated in thick photopolymer films are highly angularly selective, making these sensors challenging to view and interpret by non-experts. Here, the use of speckle holography to improve the visibility of reflection holograms is presented. A novel recording approach combining speckle recording techniques with Denisyuk reflection recording geometry is described. The recorded speckle reflection grating operates as a series of multiplexed reflection gratings with a range of spatial frequencies, capable of reflecting light at a wider range of angles. A …

Development And Evaluation Of A Multifrequency Ultrafast Doppler Spectral Analysis (Mfudsa) Algorithm For Wall Shear Stress Measurement: A Simulation And In Vitro Study, Andrew Malone, Sean Cournane, Izabela Naydenova, James F. Meaney, Andrew J. Fagan, Jacinta Browne

Articles

Cardiovascular pathology is the leading cause of death and disability in the Western world, and current diagnostic testing usually evaluates the anatomy of the vessel to determine if the vessel contains blockages and plaques. However, there is a growing school of thought that other measures, such as wall shear stress, provide more useful information for earlier diagnosis and prediction of atherosclerotic related disease compared to pulsed-wave Doppler ultrasound, magnetic resonance angiography, or computed tomography angiography. A novel algorithm for quantifying wall shear stress (WSS) in atherosclerotic plaque using diagnostic ultrasound imaging, called Multifrequency ultrafast Doppler spectral analysis (MFUDSA), is presented. …

Color-Changing Reflection Hologram For Quality Assurance Of Therapeutic Ultrasound Systems, Tatsiana Mikulchyk, John Walsh, Jacinta Browne, Izabela Naydenova, Dervil Cody

Articles

The acoustic output of clinical therapeutic ultrasound equipment requires regular quality assurance (QA) testing to ensure the safety and efficacy of the treatment and that any potentially harmful deviations from the expected output power density are detected as soon as possible. A hologram, consisting of a reflection grating fabricated in an acrylate photopolymer film, has been developed to produce an immediate, visible, and permanent change in the color of the reconstructed hologram from red to green in response to incident ultrasound energy. The influence of the therapeutic ultrasound insonation parameters (exposure time, ultrasound power density, and proximity to the point …

Probe–Integrated Electrochemical Sensing Platform For Measuring Trace Levels Of Parathion Pesticides Residues In Water Using Au- Nanoparticles Anchored Nafion Nano Composite Modified Glassy Carbon Electrode, H. Alwael, S.H. Al-Sedran, Mohamed Oubaha, N.A.A. Asiri, A.S. Bashammakh, A.S. Alharthy, N.A. Albassami, T.N. Abduljabbar, G.I. Mohamed, H.M. Nassef, E.A. Bahaidarah, B.G. Alhogbi, M.S. El-Shahawi

Articles

Nanomaterial represents a principal driver to the adoption of electrochemical sensors for pesticides residues in water. Thus, the current strategy reports facile and highly sensitive electrochemical probe for monitoring parathion residues in water. The probe was based upon the use of Au nanoparticles (AuNPs) functionalized Nafion nanocomposites modified glassy carbon electrode (Au NPs/Nafion/GCE). The surface morphology, effective surface area and electrocatalytic performance of the Au NPs/Nafion/GCE were recorded and assigned using a scanning electron microscopy (SEM), cyclic voltammetry (CV) and electronic spectra. A straightforward protocol based upon combination of Au NPs/Nafion/GCE and square wave- adsorptive cathodic stripping voltammetry at pH …

Prevalence Of Refractive Errors In Nepalese Children And Adults: A Systematic Review With Meta-Analysis, Jeewanand Bist, Himal Kandel, Nabin Paudel, Dinesh Kaphled, Rajendra Gyawali, Sanjay Marasini, Rabindra Adhikaryg, Prakash Paudel

Articles

Clinical relevance: Country-specific estimates of the prevalence of refractive errors are important to formulate national eye health policies for refractive care services. Background: The purpose of this study was to systematically synthesise available literature and estimate the prevalence of refractive errors in the Nepalese population. Methods: PubMed, Scopus, and Web of Science databases were systematically searched for articles on refractive errors and presbyopia published in English language until 27 September 2022. Population and school-based quantitative, cross-sectional prevalence studies and Rapid Assessment of Avoidable Blindness survey repository data were included. The quality of the included studies was assessed using the Newcastle …

Tfos Lifestyle - Evidence Quality Report: Advancing The Evaluation And Synthesis Of Research Evidence, Laura E. Downie, Alexis Ceecee Britten-Jones, Ruth E. Hogg, Isabelle Jalbert, Tianjing Li, Gareth Lingham, Su-Hsun Liu, Riaz Quereshi, Ian J. Saldanha, Sumeer Singh, Jennifer P. Craig

Articles

Evidence-based practice is a dominant paradigm in healthcare that emphasizes the importance of ensuring the translation of the best available, relevant research evidence into practice. An Evidence Quality Subcommittee was established to provide specialized methodological support and expertise to promote rigorous and evidence-based approaches for the Tear Film and Ocular Surface Society (TFOS) Lifestyle Epidemic reports. The present report describes the purpose, scope, and activity of the Evidence Quality Subcommittee in the undertaking of high-quality narrative-style literature reviews, and leading prospectively registered, reliable systematic reviews of high priority research questions, using standardized methods for each topic area report. Identification of …

Tfos Lifestyle: Impact Of The Digital Environment On The Ocular Surface, James S. Wolffsohn, Gareth Lingham, Laura E. Downie, Bykie Huntjens, Takenori Inomata, Saleel Jivraj, Emmanuel Kobia-Acquah, Alex Muntz, Karim Mohamed-Noriega, Sotiris Plainis, Michael Read, Rony R. Sayegh, Sumeer Singh, Tor P. Utheim, Jennifer P. Craig

Articles

Eye strain when performing tasks reliant on a digital environment can cause discomfort, affecting productivity and quality of life. Digital eye strain (the preferred terminology) was defined as “the development or exacerbation of recurrent ocular symptoms and/or signs related specifically to digital device screen viewing”. Digital eye strain prevalence of up to 97% has been reported, due to no previously agreed definition/diagnostic criteria and limitations of current questionnaires which fail to differentiate such symptoms from those arising from nondigital tasks. Objective signs such as blink rate or critical flicker frequency changes are not ‘diagnostic’ of digital eye strain nor validated …

Subfoveal Choroidal Imaging In High Myopic Nepalese Cohort, Parash Gyawali, Ashutosh Jnawali, Anish Kharal, Manish Subedi, Sandeep Kandel, Prajjol Raj Puri, Nabin Paudel

Articles

Current image captioning models produce fluent captions, but they rely on a one-size-fits-all approach that does not take into account the preferences of individual end-users. We present a method to generate descriptions with an adjustable amount of content that can be set at inference-time, thus providing a step toward a more user centered approach to image captioning.

Systematic Review Of Clinical Practice Guidelines For Uveitis, Nima Ghadiri, Ian R. Reekie, Iris Gordon, Sare Safi, Gareth Lingham, Jennifer R. Evans, Stuart Keel

Articles

To facilitate the integration of eye care into universal health coverage, the WHO is developing a Package of Eye Care Interventions (PECI). Development of the PECI involves the identification of evidence-based interventions from relevant clinical practice guidelines (CPGs) for uveitis.

A systematic review of CPGs published on uveitis between 2010 and March 2020 was conducted. CPGs passing title and abstract and full-text screening were evaluated using the Appraisal of Guidelines for Research and Evaluation II (AGREE II) tool and data on recommended interventions extracted using a standard data extraction sheet.

Effects Of Flexibility In Coarse-Grained Models For Bovine Serum Albumin And Immunoglobulin G, Frank Hirschmann, Hender Lopez, Felix Roosen-Runge, Tilo Seydel, Frank Schreiber, Martin Oettel

Articles

We construct a coarse-grained, structure-based, low-resolution, 6-bead flexible model of bovine serum albumin (BSA, PDB: 4F5S), which is a popular example of a globular protein in biophysical research. The model is obtained via direct Boltzmann inversion using all-atom simulations of a single molecule, and its particular form is selected from a large pool of 6-bead coarse-grained models using two suitable metrics that quantify the agreement in the distribution of collective coordinates between all-atom and coarse-grained Brownian dynamics simulations of solutions in the dilute limit. For immunoglobulin G (IgG), a similar structure-based 12-bead model has been introduced in the literature [Chaudhri …

Effect Of Pre-Analytical Variables On Raman And Ftir Spectral Content Of Lymphocytes, Jade F. Monaghan, Daniel Cullen, Claire Wynne, Fiona Lyng, Aidan Meade

Articles

The use of Fourier transform infrared (FTIR) and Raman spectroscopy (RS) for the analysis of lymphocytes in clinical applications is increasing in the field of biomedicine. The pre-analytical phase, which is the most vulnerable stage of the testing process, is where most errors and sample variance occur; however, it is unclear how pre-analytical variables affect the FTIR and Raman spectra of lymphocytes. In this study, we evaluated how pre-analytical procedures undertaken before spectroscopic analysis influence the spectral integrity of lymphocytes purified from the peripheral blood of male volunteers (n = 3). Pre-analytical variables investigated were associated with (i) sample preparation, …

Review Of Recent Advances In Photosensitive Polymer Materials And Requirements For Transmission Diffractive Optical Elements For Led Light Sources, Michael Murray, Izabela Naydenova, Suzanne Martin

Articles

Scattered light from outdoor LED sources is a major contributor to blue-spectrum light pollution which negatively impacts ecology and public health. Volume holographic diffractive optical elements (DOEs), made with low-cost photosensitive polymers, are proposed as a technological solution that can minimise this scattering. This review examines requirements needed for efficient operation of transmission-format DOEs with LEDs and implications for material choices. For such DOEs to have a single diffraction order and high efficiency there is a corresponding range of acceptable Δn. A survey of materials also found that many current materials satisfy the Δn requirements for single-element DOEs. It is …

The Association Of Adolescents' Smoking With The Physical Activity Levels Of Their Friends, R.A. Smit, M.A.G. Kuipers, B. Federico, Luke Clancy, J. Perlman, A.D. Rozema, A.E. Kunst

Articles

Background: Smoking is inversely related to people's Physical Activity Level (PAL). As the behavior of friends may affect the choices and behavior of adolescents, having friends with a high PAL may potentially protect against adolescent smoking. This study aims to assess whether adolescents' smoking is associated with the PAL of their friends. Methods: SILNE-R survey data of 11.918 adolescents from 55 different schools in 7 European cities was used to determine weekly smoking, individual PAL, PAL of friends, school PAL, and smoking of friends. Multilevel, multivariable logistic regression analysis were used to assess the association between the PAL of friends …

The Effectiveness Of Allen Carr's Method For Smoking Cessation: A Systematic Review, Irene Possenti, Marco Scala, Alessandra Lugo, Luke Clancy, Sheila Keogan, Silvano Gallus

Articles

Introduction: Allen Carr's (AC) method is a pharmacotherapy-free approach to quit smoking that is delivered through seminars, online courses, or in the form of a book. It has gained popularity, but its effectiveness remains controversial due to a lack of scientific evidence. This systematic review aims to provide an updated overview of the current evidence on the effectiveness of the AC method.

Methods: We conducted a systematic literature review of all epidemiological studies evaluating the effectiveness of the AC method for smoking cessation, published in PubMed/MEDLINE and Embase up to March 2023.

Results: Among 34 original studies identified through the …

Global Short-Term Mortality Risk And Burden Associated With Tropical Cyclones From 1980 To 2019: A Multi-Country Time-Series Study, Wenzhong Huang, Shansan Li, Thomas Vogt, Rongbin Xu, Shilu Tong, Tomas Molina, Pierre Masselot, Antonio Gasparrini, Ben Armstrong, Mathilde Pascal, Dominic Roye, Chris Fook Sheng Ng, Ana Maria Vicedo-Cabrera, Joel Schwartz, Eric Lavigne, Haidong Kan, Patrick J. Goodman, Ariana Zeka, Masahiro Hashizume, Magali Hurtado Dias, Cesar De La Cruz Valencia, Xerxes Seposo, Baltazar Nunes, Joana Madureira, Ho Kim, Whanhee Lee, Aurelio Tobias, Carmen Iniguez, Yue Leon Guo, Shih-Chun Pan, Antonella Zanobetti, Tran Ngoc Dang, Do Van Dung, Tobias Geiger, Christian Otto, Amanda Johnson, Simon Hales, Pei Yu, Zhengyu Yang, Elizabeth A. Ritchie, Yuming Guo

Articles

The global spatiotemporal pattern of mortality risk and burden attributable to tropical cyclones is unclear. We aimed to evaluate the global short-term mortality risk and burden associated with tropical cyclones from 1980 to 2019.

Raman Spectroscopy And Machine Learning Enables Estimation Of Articular Cartilage Structural, Compositional, And Functional Properties, Eslam Shehata, Ervin Nippolainen, Rubina Shaikh, Ari Petteri Ronkainen, Juha Töyräs, Jaakko K. Sarin, Isaac O. Afara

Articles

Objective: To differentiate healthy from artificially degraded articular cartilage and estimate its structural, compositional, and functional properties using Raman spectroscopy (RS). Design: Visually normal bovine patellae (n = 12) were used in this study. Osteochondral plugs (n = 60) were prepared and artificially degraded either enzymatically (via Collagenase D or Trypsin) or mechanically (via impact loading or surface abrasion) to induce mild to severe cartilage damage; additionally, control plugs were prepared (n = 12). Raman spectra were acquired from the samples before and after artificial degradation. Afterwards, reference biomechanical properties, proteoglycan (PG) content, collagen orientation, and zonal (%) thickness of …

Discovering Optimal Strategy In Tactical Combat Scenarios Through The Evolution Of Behaviour Trees, Martin Masek, Chiou Peng Lam, Luke Kelly, Martin Wong

Research outputs 2014 to 2021

In this paper we address the problem of automatically discovering optimal tactics in a combat scenario in which two opposing sides control a number of fighting units. Our approach is based on the evolution of behaviour trees, combined with simulation-based evaluation of solutions to drive the evolution. Our behaviour trees use a small set of possible actions that can be assigned to a combat unit, along with standard behaviour tree constructs and a novel approach for selecting which action from the tree is performed. A set of test scenarios was designed for which an optimal strategy is known from the …

Robert E. Bryant Papers - Accession 1745, Robert Edmiston Bryant

Manuscript Collection

The Robert E. Bryant Papers consist of papers and memorabilia belonging to Robert “Bob” Edmiston Bryant (1903-1977) who was a Rock Hill theatre-owner, photographer, and a world record holding airplane pilot. The collection includes mostly photographs, negatives, slides, scrapbooks, pilot logs, and newspaper articles related to his flying career and to the Pix Theatre, but also includes correspondence, books, memorabilia (including a key to the City of Camden from Mayor James L. Anderson), awards, and certificates related to his life. There are materials related to the Apollo 16 mission including a scrapbook, photographs, and memorabilia. Former Astronaut and Lancaster, SC …

Hugh E. Henry Papers - Accession 1763, Hugh Elmer Henry

Manuscript Collection

The Hugh E. Elmer Papers document the personal, familial, educational, religious, and community interests of Hugh Elmer Henry (1926–2001) and, more broadly, aspects of civic and social life in Chester County, South Carolina, during the twentieth century. The collection spans from the early 1900s to 2001, with the greatest concentration of materials relating to the late 1930s through the 1940s and retrospective documentation created in later decades.

A substantial portion of the collection focuses on Chester High School, particularly the classes from 1938 through 1943. Included are newspaper clippings documenting class reunions, school activities, athletic teams, commencement exercises, and student …

Woman's Club Of Rock Hill Records - Accession 1586, Woman's Club Of Rock Hill

Manuscript Collection

The Woman’s Club of Rock Hill Records consists of documents that detail the general history of the organization, history on the building fund project, history on Rock Hill, accounting notes on the yearly budget for the organization, a copy of the constitution and by-laws of the organization, information regarding the Eugene Smith Award and Diamond Jubilee year, and two yearbooks. In addition, there are blank copies of various forms used internally within the organization.

South Carolina Commission On Women Records - Accession 691, Commission On Women, South Carolina

Manuscript Collection

The South Carolina Commission on Women Records consist of correspondence, minutes, legislation, press releases and forms, and documents relating to the activities of the agency. Broadcast Awards, Domestic Violence Project, White House Conference on Families, A week of Films By and About Women, and National Associate of Commissions for Women Conferences. The South Carolina Commission on Women was created in 1970 to “study the status of women and make periodic reports to the governor with its recommendations concerning educational needs and opportunities, to disseminate material relating to the rights, responsibilities and status of women.”

Mary Pitts Perry Papers - Accession 1789, Mary Celeste Pitts Perry

Manuscript Collection

The Mary Pitts Perry Papers document the personal collecting activities and institutional connections of Mary Celeste Pitts Perry (b. 1943), a 1962 graduate of the Winthrop Training School. The collection reflects Perry’s longstanding family ties to Winthrop and her interest in preserving materials related to the history of Winthrop College (now Winthrop University), the Winthrop Training School, the city of Rock Hill, and the surrounding Catawba region, as well as selected aspects of her family history.

Materials in the collection span the late nineteenth century through the early twenty-first century and include books, college bulletins, newspapers, newsletters, photographs, programs, ephemera, …

Frances Crutchfield Kellers Winthrop And Family Letters Collection - Accession 1821, Frances Crutchfield Kellers

Manuscript Collection

The Frances Crutchfield Kellers Winthrop and Family Letters Collection consists of letters written by Winthrop College graduate, Frances Crutchfield Kellers (1912-1993). Frances attended Winthrop from 1930-1934 and graduated with the Class of 1934. These letters are mostly addressed to her mother and father, describing various aspects of her time at Winthrop, her friends, her dorm-mates, her struggles and various escapades she enjoyed during her school days. The letters begin a few months before attending Winthrop and continue through the end of her junior year. Also included is a pocket calendar from the year 1986 as well as paper slips written …

Over The Teacups Club Records - Accession 1493, Book Club Of Rock Hill, Over The Teacups

Manuscript Collection

Over The Teacups is a literary society formed in Rock Hill, SC in 1897 with the purpose to be for the “literary improvement and social intercourse of the members.” The Over the Teacups Records consists of the constitution and bylaws, minutes and financial records, correspondence, yearbooks, South Carolina Federation of Women’s Clubs’ yearbook and correspondence, and the General Federation of Women’s Clubs’ booklets, centennial celebration and correspondence.

Rock Hill Herald Collection - Accession 1781, Rock Hill Herald, Evening Herald

Manuscript Collection

The Rock Hill Herald Collection documents the journalistic, civic, political, cultural, and social history of Rock Hill and York County, South Carolina, primarily during the mid- to late twentieth century. The collection consists of photographs, negatives, contact sheets, newspaper clippings, slides, illustrations, and Herald Publishing Company operations manuals generated or assembled in the course of news reporting and newspaper administration.

The collection extensively documents notable local, state, and national figures who were reported on by the Rock Hill Herald and its affiliated publications. Subjects represented include elected officials, civic leaders, educators, artists, religious figures, athletes, business leaders, and community activists. …

Review-Electrode Kinetics And Electrolyte Stability In Vanadium Flow Batteries, Andrea Bourke, Daniela Oboroceanu, Nathan Quill, Catherine Lenihan, Maria Alhajji Safi Maria Alhajji Safi, Mallory A. Miller, Robert F. Savinell, Jesse S. Wainright, Varsha Sasikumarsp, Maria Rybalchenko, Pupak Amini, Niall Dalton, Robert P. Lynch, D. Noel Buckley

Articles

Two aspects of vanadium flow batteries are reviewed: electrochemical kinetics on carbon electrodes and positive electrolyte stability. There is poor agreement between reported values of kinetic parameters; however, most authors report that kinetic rates are faster for VIV/VV than for VII/VIII. Cycling the electrode potential increases the rates of both reactions initially due to roughening but when no further roughening is observed, the VII/VIII and VIV/VV reactions are affected oppositely by the pretreatment potential. Anodic pretreatment activates the electrode for the VII/VIII reaction, and deactivates it for VIV/VV. Three states of the carbon surface are suggested: reduced and oxidized states …

Cover And Contents

Turkish Journal of Veterinary & Animal Sciences

No abstract provided.