Medicine and Health Sciences Commons^™

Electrical And Mechanical Properties Of Bzt − Xbct Lead‐Free Piezoceramics, Raziye Hayati, Mohammad Fayazi, Hadi Diargar, Mohammad Kaveh, Lobat Tayebi

School of Dentistry Faculty Research and Publications

In this study, lead‐free (1 − x)Ba(Zr_0.2Ti_0.8)O3 − x(Ba_0.7Ca_0.3)TiO₃ compositions are synthesized via conventional solid oxide route, and the ceramics are fabricated with normal sintering in air. The effects of composition fluctuations on dielectric, piezoelectric, and mechanical properties are investigated. The phase structure and the microstructure are analyzed with X‐ray diffraction and scanning electron microscopy. The best dielectric and piezoelectric properties of ε_r = 11 207 and d₃₃ = 330 pC/N were obtained for BZT−0.35BCT and BZT−0.5BCT ceramics, respectively. The mechanical behavior—in terms of Vickers hardness and compressive and …

The Adverse Effects Of Radiotherapy On The Structure Of Dental Hard Tissues And Longevity Of Dental Restoration, Miguel Angel Munoz, Carolina Garin-Correa, Wilfredo Gonzalez-Arriagada, Ximena Quintela Davila, Patricio Haberle, Ana K. Bedran-Russo, Issis Luque-Martinez

School of Dentistry Faculty Research and Publications

Purpose:

The main goal of this study was to evaluate the impact of different ionizing radiation doses on the mineral (carbonate/phosphate ratio, crystallinity index [CI]) and organic (amide III/phosphate, amide I sub-band ratios) structures, as well as the microhardness, of enamel and dentin, along with their influence on the bonding strength stability of the etch-and-rinse (ER) and self-etch (SE) dental adhesive strategies.

Materials and methods:

Enamel and dentin human tissue specimens were irradiated (with 0, 20, 40, and 70 Gy radiation doses, respectively) and sectioned to perform an attenuated total reflection-Fourier transform IR spectroscopy assay (ATR-FTIR) and the Vickers microhardness …

Etiology Of Lumbosacral Radiculoplexopathy: Sacral Insufficiency Fracture On Magnetic Resonance Imaging, Christian Geannette, Susan C Lee, Darryl B Sneag

Faculty, Staff and Students Publications

BACKGROUND: Sacral insufficiency fracture (SIF) can cause lumbosacral radiculoplexopathy (LSRP) and is probably under-recognized. Symptoms may include nonspecific lumbar spine or buttock pain that is exacerbated by physical activity and alleviated with rest. The frequency of LSRP secondary to SIF has not been reported.

QUESTIONS/PURPOSES: We aimed to determine the frequency of LSRP associated with SIF using magnetic resonance imaging (MRI) of the lumbar spine.

METHODS: We searched a radiology database at our institution using the keywords "sacral insufficiency fracture" and "lumbar spine MRI" for patient records from January 2014 through December 2017. We assessed for the presence of LSRP, …

In Response To Letter Title "Immediate Hemodynamic And Gaseous Exchange Effect Of Bi-Level Positive Airway Pressure After Cardiac Surgery: Our Insight To Hamid Et Al.'S Study", Mohammad Hamid, Mohammad Irfan Akhtar, Saba Ahmed

Department of Anaesthesia

No abstract provided.

Correlation Of Ape1 With Vegfa And Cd163+ Macrophage Infiltration In Bladder Cancer And Their Prognostic Significance, Lin-Ang Wang, Bo Yang, Tang Tang, Yuxin Yang, Dianzheng Zhang, Hualing Xiao, Jing Xu, Luofu Wang, Li Lin, Jun Jiang

PCOM Scholarly Works

The present study sought to estimate the applicability of apurinic/apyrimidinic endodeoxyribonuclease 1 (APE1), vascular endothelial growth factor A (VEGFA) expression and CD163+ tumor‑associated macrophage (TAM) ratio as prognostic factors in bladder cancer (BCa). A total of 127 patients with bladder urothelial cancer who underwent radical cystectomy at Daping Hospital were recruited between January 2013 and January 2017, including 45 cases of non‑muscle invasive BCa (NMIBC) and 82 of MIBC. Immunohistochemical detection of APE1, VEGFA and CD163, as well as multiple immunofluorescence staining for APE1, VEGFA, CD163 and CD34, were performed on tissue samples. For APE1 and VEGFA, the staining was …

Singapore's Legal And Economic Response To The Covid-19 Crisis: The Role Of Insolvency Law And Corporate Workouts, Aurelio Gurrea-Martinez, Samuel Loh

Research Collection Yong Pung How School Of Law

The international spread of the coronavirus has forced many countries to put their economies into ‘hibernation’, leading to one of the worst recessions observed in modern times. Since Singapore is not isolated from this crisis, the Government had to intervene by adopting a very ambitious package of legal and financial measures to support businesses, households and employees. Among these measures, the Government has implemented various temporary changes to the insolvency legislation, and the use of out-of-court agreements has been encouraged for debtors facing financial trouble. This article argues that, while insolvency law can play an important role in the current …

Cd4 Deficiency Causes Poliomyelitis And Axonal Blebbing In Murine Coronavirus-Induced Neuroinflammation., Debanjana Chakravarty, Fareeha Saadi, Soumya Kundu, Abhishek Bose, Reas Khan, Kimberly Dine, Lawrence C Kenyon, Kenneth S Shindler, Jayasri Das Sarma

Department of Pathology, Anatomy, and Cell Biology Faculty Papers

Mouse hepatitis virus (MHV) is a murine betacoronavirus (m-CoV) that causes a wide range of diseases in mice and rats, including hepatitis, enteritis, respiratory diseases, and encephalomyelitis in the central nervous system (CNS). MHV infection in mice provides an efficient cause-effect experimental model to understand the mechanisms of direct virus-induced neural-cell damage leading to demyelination and axonal loss, which are pathological features of multiple sclerosis (MS), the most common disabling neurological disease in young adults. Infiltration of T lymphocytes, activation of microglia, and their interplay are the primary pathophysiological events leading to disruption of the myelin sheath in MS. However, …

Busting Myths And Dispelling Doubts About Covid-19, Mark Findlay

Research Collection Yong Pung How School Of Law

The Centre for AI and Data Governance (CAIDG) at Singapore Management University (SMU) has embarked over past months on a programme of research designed to confront concerns about the pandemic and its control. Our interest is primarily directed to the ways in which AI-assisted technologies and mass data sharing have become a feature of pandemic control strategies. We want to know what impact these developments are having on community confidence and health safety. In developing this work, we have come across many myths that need busting.

Understanding The Requisite Content For Interprofessional Education On Sentinel Injuries, A Qualitative Study, Elizabeth A. Cleek

Dissertations (1934 -)

Child maltreatment is a public health concern in the United States. The consequences of child maltreatment pose both immediate and lifelong health threats to victimized children. Given the health consequences of child maltreatment, health care providers (HCPs) are legally required to report any reasonable suspicion of child maltreatment to child protective services (CPS). Sentinel injuries (SIs) are some of the earliest and most readily identifiable red flags of child maltreatment. SIs are any unexpected bruising or intra-oral injuries in non-mobile infants. SIs are highly correlated with child maltreatment and may be the only sign of child maltreatment in an otherwise …

Mean Arterial Pressure In Acute Ischemic Stroke Study, Mary Angela Grove

Theses and Dissertations (ETD)

Background. There is little, if any, evidence available on the validation of blood pressure (BP) measurements obtained in the acute care setting. Despite this, acute stroke practitioners trust and rely on non-invasive blood pressure (NIBP) devices to guide acute ischemic stroke (AIS) patients’ treatment. Although systolic blood pressure (SBP) has been found to be the most unreliable measurement displayed on NIBP devices, treatment decisions for AIS are based on them. Today, 25 years after the FDA’s approval of alteplase, practitioners continue to use BP parameters of 185/110 and 180/105 to guide the initiation of alteplase bolus and infusion, although the …

Efficacy Of A Novel Mitochondrial-Derived Peptide In A Porcine Model Of Myocardial Ischemia/Reperfusion Injury, Thomas E. Sharp, Zhenwei Gong, Amy Scarborough, Eric S. Goetzman, Murtuza J. Ali, Pablo Spaletra, David J. Lefer, Radhika H. Muzumdar, Traci T. Goodchild

School of Medicine Faculty Publications

With the complexities that surround myocardial ischemia/reperfusion (MI/R) injury, therapies adjunctive to reperfusion that elicit beneficial pleiotropic effects and do not overlap with standard of care are necessary. This study found that the mitochondrial-derived peptide S14G-humanin (HNG) (2 mg/kg), an analogue of humanin, reduced infarct size in a large animal model of MI/R. However, when ischemic time was increased, the infarct-sparing effects were abolished with the same dose of HNG. Thus, although the 60-min MI/R study showed that HNG cardioprotection translates beyond small animal models, further studies are needed to optimize HNG therapy for longer, more patient-relevant periods of cardiac …

Research Provides Evidence For Health Policy In Lao Pdr, Ian Bromage, Pamela J. Wright Phd, Ms, Med, Rn, Cen, Sengchanh Kounnavong, Vanphanom Sychareun, Léonie Venroij

Publications

No abstract provided.

Mini-Logger- A Wearable Inertial Measurement Unit (Imu) For Postural Sway Analysis, Michael Pollind, Rahul Soangra

Physical Therapy Faculty Articles and Research

Postural instability assessment is an important tool in fall risk analysis and for timely intervention of falls to reduce or prevent fall injuries. Traditionally fall risk is measured though postural sway assessment and is collected through forceplates by mapping Center of Pressure (COP) excursions or using motion analysis camera system for marker sway trajectories. However, both of these systems are expensive and lack portability to their usage in clinical environments. In this study, we developed a novel wearable low-cost MEMS inertial sensor and validated its usage for human postural sway assessment in standing posture with eyes open/closed, vibration/no vibration, and …

Vertical Transmission And Venereal Transmission Of Zika Virus In A Population Of South Texas Aedes Aegypti, Jeremy Marshall

Theses and Dissertations

Zika virus has become a greater global public health concern from the occurrence of outbreaks in 2007 and its expansion to the Americas in 2015. The presence of Aedes aegypti in the Lower Rio Grande Valley and evidence of local transmission of Zika in Brownsville, Texas provides a need to research transmission dynamics of local populations. In these experiments, a locally acquired, laboratory colony of Aedes aegypti mosquitoes were infected with a blood meal featuring a Mexican isolate of Zika virus to display vector competency, vertical transmission, venereal transmission. Here, we infected 39 females, with 34 of them displaying evidence …

Sensory Based Interventions In The School Setting: P Entions In The School Setting: Perspectives Of Paraeducators, Lyn Kaiser, Marie-Christine Potvin, Caitlin Beach

Department of Occupational Therapy Faculty Papers

Background: The purpose of this study was to explore paraeducators’ perceptions of sensory-based interventions (SBIs). Paraeducators are frequently responsible for implementing SBIs to enhance a student’s ability to learn in school. Previous studies have explored the perceptions of teachers and occupational therapists, but as of yet, there are no published studies exploring the perceptions of paraeducators regarding the efficacy of SBIs.

Methods: An ethnographic study was conducted with paraeducators (n = 11) working with students diagnosed with autism spectrum disorder or emotional disturbance in a center-based special education program. These paraeducators participated in a focus group or an interview that …

Aggressive Angiomyxoma In The Ischiorectal Fossa, Asra Wahid, Abdul Hakeem, Sadaf Khan

Medical College Documents

Aggressive Angiomyxoma (AA) is a soft tissue tumour that principally affects women of the reproductive age, primarily involving the pelvis and the perineum. Despite being slow growing, it is classified as aggressive due to its locally infiltrative nature and high recurrence. It is rare, often asymptomatic and is misdiagnosed. However, it has characteristic features on radiographic imaging. Complete surgical resection is the ideal approach to treat AA. We report a case of an aggressive angiomyxoma in a 17 year old female, located in the ischiorectal fossa and diagnosed incidentally on a magnetic resonance imaging (MRI). The lesion was excised without …

Congenital Abnormalities Of The Lower Airways And Lungs, Christopher M. Oermann

Presentations

Goals and Objectives. Participants will be able to: Describe the 5 stages of fetal lung development. Summarize the prenatal identification and management of congenital abnormalities of the lower airways and lung (CALAL). Explain the classification of CALAL. Compare the clinical characteristics, pathology, and management of common CALAL. Discuss the long term prognosis of CALAL

Determinants Of Nutrition Agenda Setting In The Context Of The Double Burden Of Malnutrition In Tamil Nadu, India, Shilpa Vimalananda Constantinides

Theses and Dissertations

The double burden of malnutrition is increasing in low- and middleincome countries, with economic, social, and health consequences. Policies and programs to address malnutrition at the national and subnational levels reflect the priorities and framing of the problem by the stakeholder community. Previous studies have examined if and how nutrition-related NCDs have been included into national nutrition policy agendas that have historically focused on reduction of undernutrition, but little is known about if or how this process occurs at the subnational level where policies are translated and implemented according to local contexts, priorities, and frames of nutrition-related NCDs.

We aimed …

Narrative Language Among Mothers With The Fmr1 Premutation And Mothers Of Children With Autism Spectrum Disorder, Sara Mousavi

Theses and Dissertations

Difficulties with pragmatic language are known language traits among women with the FMR1 premutation and within the broad autism phenotype (BAP). Our study investigated the narrative cohesion and story grammar organization of spontaneously generated stories produced by mothers with the FMR1 premutation, mothers of children with ASD, and mothers of typically developing children. No group differences were observed in story grammar, overall quality, or frequency of use of temporal devices. But both the mothers of children with ASD and mothers with the FMR1 premutation committed reference errors at a significantly higher frequency than mothers in the control group. This study …

Dosimetric Effect When Treating Multiple Lesion Srs Using Vmat With And Without Jaw Tracking, Mindy Bui

Masters Projects

The main purpose of this study was to determine if jaw tracking or non-jaw tracking is the superior technique for patients with multiple brain metastasis that are treated with Volumetric Modulated Radiation Therapy (VMAT) Stereotactic Radiosurgery (SRS). Doses to the organs at risk (OAR) and the target volumes were analyzed using the dose volume histogram (DVH) and dose statistics for each plan. The goal of this study included analyzing the dosimetric effect on the organs at risk and the normal tissue when using jaw tracking versus non jaw tracking. The pros and cons for each technique were identified as well …

Analysis On Suicidal Ideation Among Adolescents (12-17 Years) In The Usa, Himani Raturi

Electronic Theses, Projects, and Dissertations

Suicide is one of the leading health concerns in United States among adolescents and the presence of suicidal ideation (SI) is quite high, with ~20-30% of adolescents reporting it at some point. Though we have seen growth and development in the prevention of suicide, there is limited research on the ability to identify the adolescents which might be at risk for SI. The objective behind the project is to identify adolescents with SI using machine learning.

The project shows statistics from different articles on adolescents in the U.S. For this study, adolescent data was taken from NSDUH 2018. Moreover, detailed …

Health Insurance Coverage Disruptions And Cancer Care And Outcomes: Systematic Review Of Published Research, K Robin Yabroff, Katherine Reeder-Hayes, Jingxuan Zhao, Michael T Halpern, Ana Maria Lopez, Leon Bernal-Mizrachi, Anderson B Collier, Joan Neuner, Jonathan Phillips, William Blackstock, Manali Patel

Kimmel Cancer Center Faculty Papers

BACKGROUND: Lack of health insurance coverage is associated with poor access and receipt of cancer care and survival in the United States. Disruptions in coverage are common among low-income populations, but little is known about associations of disruptions with cancer care, including prevention, screening, and treatment, as well as outcomes of stage at diagnosis and survival.

METHODS: We conducted a systematic review of studies of health insurance coverage disruptions and cancer care and outcomes published between 1980 and 2019. We used the PubMed, EMBASE, Scopus, and CINAHL databases and identified 29 observational studies. Study characteristics and key findings were abstracted …

Wax Models In Dermatology: Updated Through 2019, Lawrence Parish

Department of Dermatology and Cutaneous Biology Faculty Papers

Wax models have occupied an unique position in the teaching of dermatology. While watercolor depictions of skin lesions and later photographic illustrations have been used, the wax model offers an unique presentation of the morphology, often not captured by other methods .

The Membrane Protein Ankh Is Crucial For Bone Mechanical Performance By Mediating Cellular Export Of Citrate And Atp, Flóra Szeri, Stefan Lundkvist, Sylvia Donnelly, Udo F H Engelke, Kyu Rhee, Charlene J Williams, John P Sundberg, Ron A Wevers, Ryan Tomlinson, Robert S Jansen, Koen Van De Wetering

Department of Dermatology and Cutaneous Biology Faculty Papers

The membrane protein ANKH was known to prevent pathological mineralization of joints and was thought to export pyrophosphate (PPi) from cells. This did not explain, however, the presence of ANKH in tissues, such as brain, blood vessels and muscle. We now report that in cultured cells ANKH exports ATP, rather than PPi, and, unexpectedly, also citrate as a prominent metabolite. The extracellular ATP is rapidly converted into PPi, explaining the role of ANKH in preventing ankylosis. Mice lacking functional Ank (Ankank/ank mice) had plasma citrate concentrations that were 65% lower than those detected in wild type control animals. Consequently, citrate …

Frontal Vehicle Illumination Via Rear-Facing Lighting Reduces Potential For Collisions With White-Tailed Deer, Travis L. Devault, Thomas W. Seamans, Bradley Blackwell

United States Department of Agriculture Wildlife Services: Staff Publications

nimal–vehicle collisions cause many millions of animal deaths each year worldwide and present a substantial safety risk to people. In the United States and Canada, deer (Odocoileus spp.) are involved in most animal–vehicle collisions associated with human injuries. We evaluated a vehicle-based collision mitigation method designed to decrease the likelihood of deer–vehicle collisions during low-light conditions, when most collisions occur. Specifically, we investigated whether the use of a rear-facing light, providing more complete frontal vehicle illumination than standard headlights alone, enhanced vehicle avoidance behaviors of white-tailed deer (O. virginianus). We quantified flight initiation distance (FID), the likelihood …

Bayesian Modelling Of High-Throughput Sequencing Assays With Malacoda., Andrew R Ghazi, Xianguo Kong, Ed S Chen, Leonard C Edelstein, Chad A Shaw

Cardeza Foundation for Hematologic Research

NGS studies have uncovered an ever-growing catalog of human variation while leaving an enormous gap between observed variation and experimental characterization of variant function. High-throughput screens powered by NGS have greatly increased the rate of variant functionalization, but the development of comprehensive statistical methods to analyze screen data has lagged. In the massively parallel reporter assay (MPRA), short barcodes are counted by sequencing DNA libraries transfected into cells and the cell's output RNA in order to simultaneously measure the shifts in transcription induced by thousands of genetic variants. These counts present many statistical challenges, including overdispersion, depth dependence, and uncertain …

Thermotropic And Lyotropic Phase Behaviours Of Spontaneously Self-Assembled Amphiphilic Branched-Chain Glycosides With Various Chain Length, Abdul Hamid Hairul Amani

Student Works (2020-2029)

Lipid polymorphism is a process which illustrates the self-assembly of lipid aggregation depending on the environment. Lipids such as branched-chain glycolipids which are amphiphilic molecules also known as amphitropic tend to generate mesophases in thermotropic (dry) and lyotropic (solvation) conditions. These molecules are capable of self-aggregating into various types of glycolipid self-assemblies offering an interesting insight in relation to their functions in living cells. Hence, this study aims to investigate the mesophases of ꞵ-D-glycosides which are branched-chain synthetic glycolipids, namely, ꞵ-D-glucosides and ꞵ-D-maltosides. The study was carried out on the thermotropic phases of dry glycosides and the lyotropic phases of …

An Improved Bone Age Assessment Using Advanced Image Processing And Deep Learning Approach, Kim Meng Liang

Student Works (2020-2029)

Pediatricians often apply bone age assessment to measure the skeletal maturity of children and to predict the future height. These discrepancies are good indicators for diagnosing growth disorders. Normally, left hand skeletal is employed in this assessment. The low quality of ossification sites of carpals deteriorates the pediatrician’s visibility in inspecting the pertinent radiographic manifestations. This in turn affects the bone age assessment. Therefore, we have to enhance the quality before assessing them. Histogram equalization is one of the contrast enhancement techniques that suit this type of enhancement. Existing histogram equalizations, however, are confronting with problems in preserving the brightness …

Nighttime Blood Pressure Interacts With Apoe Genotype To Increase The Risk Of Incident Dementia Of The Alzheimer’S Type In Hispanics, Jesus D. Melgarejo, Daniel C. Aguirre-Acevedo, Ciro Gaona, Carlos A. Chavez, Gustavo E. Calmon, Egle R. Silva, Gabriel A. De Erausquin, Mario Gil, Luis J. Mena, Joseph D. Terwilliger, Humberto Arboleda, Nikolaos Scarmeas, Joseph H. Lee, Gladys E. Maestre

School of Medicine Publications

Background: Dementia of the Alzheimer’s type (DAT) impacts Hispanics disproportionately, with almost a twofold elevated risk of developing DAT, as well as earlier onset of the disease, than in non-Hispanic Whites. However, the role of main risk factors for DAT, such as APOE ɛ4 and blood pressure (BP) levels, remains uncertain among Hispanics.

Objective: To investigate the association of APOE ɛ4 and BP levels, measures with 24 h ambulatory BP monitoring, with incidence of DAT in an elderly cohort of Hispanics.

Methods:1,320 participants from the Maracaibo Aging Study, free of dementia at the baseline, and with ambulatory BP …

Perspectives On The Intracellular Bacterium Chlamydia Pneumoniae In Late-Onset Dementia, Brian J. Balin Phd

PCOM Scholarly Works

Purpose of Review

Chronic diseases remain a daunting challenge for clinicians and researchers alike. While difficult to completely understand, most chronic diseases, including late-onset dementias, are thought to arise as an interplay between host genetic factors and environmental insults. One of the most diverse and ubiquitous environmental insults centers on infectious agents. Associations of infectious agents with late-onset dementia have taken on heightened importance, including our investigations of infection by the intracellular respiratory bacterium, Chlamydia pneumoniae (Cpn), in late-onset dementia of the Alzheimer’s type.

Recent Findings

Over the last two decades, the relationship of this infection to pathogenesis …