Peter Ting IHM - Academia.edu (original) (raw)

Papers by Peter Ting IHM

JACC: Case Reports, Mar 1, 2021

A 56-year-old man underwent cardiac transplantation in April 2018. His post-operative course was ... more A 56-year-old man underwent cardiac transplantation in April 2018. His post-operative course was uncomplicated and he had normal allograft function. On December 2019 he was admitted for fever and diarrhea and was found to have cytomegalovirus infection. A few weeks later, he presented with Guillain-Barré Syndrome. (Level of Difficulty: Advanced.)

The apparel industry is facing significant challenges. Today's consumers have less patience to wa... more The apparel industry is facing significant challenges. Today's consumers have less patience to wait, and omnichannel retailing is the new norm. This requires the entire apparel supply chain to become more agile, which means that stakeholders need to have better visibility, speed and flexibility. While supply chain digitalization helps the industry to become more agile, enabling technology like Radio Frequency Identification (RFID) has not been adopted in scale. This capstone aims to answer how RFID creates value in the apparel supply chain by improving agility. Based on our sponsor's RFID pilot, we study the technology's potential in its logistics & distribution and retail stages. Using process analysis, RFID data analysis, and cluster analysis, we identify relevant value drivers for different stakeholders. In the pilot's context, we find three clusters: fastmoving omnichannel, online long tail and retail longtail, which have different supply chain characteristics. We also connect RFID data, captured at different checkpoints, with existing system data to generate business intelligence for the clusters. The result shows that RFID improves store KPIs such as daily inventory record accuracies and on-shelf availability. In addition, we analyze supply chain policies for the following value drivers: planning, inventory management, replenishment, and store management. In general, RFID provides end-to-end product visibility, which is beneficial for all stakeholders. Also, there are different levers that can be used to improve speed and flexibility for different stakeholders. Overall, the retail store gains most value from RFID initiatives. Nevertheless, significant value can be created for other stakeholders from advanced analytics and appropriate data sharing. Organizations need to leverage analytical tools and techniques to improve supply chain agility. Our findings can be useful for other apparel businesses that currently use the traditional mass manufacturing model and are seeking to improve their supply chain agility.

The CGL trpe of multiperipheral integral equation has been derived in terms of invariant variable... more The CGL trpe of multiperipheral integral equation has been derived in terms of invariant variables, without assuming subenergies to be large compared with momentum transfers and particle masses. Both forward direction and nonforward direction have been worked out in detail, and the muitiperipheral model with Toiler-angle-dependent vertex functions has been discussed. We have furthermore demonstrated that all the qualitative physical properties of the ABFST model remain true in this generalized multiperipheral model. Recently Chew, Goldberger, and Low (CGL) 7 and Halliday8 have proposed a multiperipheral model which contains the multi-Regge or C.?A models as a special case, and also leads to a unitarity integral equation for the elastic amplitude. The method of deriving this equation

Canadian Journal of Cardiology, Sep 1, 2011

excluded due to sarcoidosis/aortitis (28), scan report unavailable (1), repeat scan (1) or uninte... more excluded due to sarcoidosis/aortitis (28), scan report unavailable (1), repeat scan (1) or uninterpretable scan (1). Scan interpreters indicated a recommendation where revasc/revasc workup was suggested (group(Gr)-A), revasc was not recommended (Gr-B) or recommendation was not possible without further investigation (Gr-C). The primary outcome was the combined endpoint of cardiac death, non-fatal MI & cardiac hospitalization. A perfusion/FDG mismatch score of Ն10% was considered significant hibernating viable myocardium. Of the 359 pts: mean age 64.4 Ϯ 10.8 yrs, 82.7% male; LVEF ϭ 26% Ϯ 7.7; 20.9% had renal dysfunction; 41.8% had DM. Follow-up data was available for 332/359 pts (92%). Total composite event rate was 150 (45.2%). A recommendation to revascularize or not, was made in 285/332 (85.8%) pts. Of 141/285 pts (49.5%) in whom revasc was recommended, 113/ 141 (80.1%) were evaluated for revasc (cath) or revascularized: 99 (70.2%) ultimately revascularized. In contrast, revasc was not recommended in 144/285 pts (50.5%), among whom 32 (22.2%) underwent revasc (P Ͻ 0.001 (Gr-A vs Gr-B). Pts with mismatch Ն10% who did not undergo revasc had more composite endpoints vs. those who were revascularized (P ϭ 0.010). When revascularization was recommended, pts who were revascularized had lower (31.0%) composite endpoint rate vs. those who were not revascularized (61.4%) P ϭ 0.002. CONCLUSION: Recommendations based on FDG PET impacted revasc decisions. Furthermore, when revasc was performed in adherence to a recommendation to revascularize, pts had improved outcome, suggesting FDG PET results are clinically useful in selecting pts likely to benefit from revasc. In addition, the presence of hibernating myocardium, as defined by PET mismatch, identifies patients who are at high risk for events if they do not undergo revascularization.

Physical review, Dec 15, 1970

Page 1. 2982 Y. M. P. I.A VII AN D YY I.EE Lagrangian. By adding more and more multiplets into th... more Page 1. 2982 Y. M. P. I.A VII AN D YY I.EE Lagrangian. By adding more and more multiplets into the vector P, we get a, more and more complicated system. However, in the construction of the breaking term uv+cue, more and ...

Federal Publications eBooks, 1998

An academic directory and search engine.

$Research paper thumbnail of Assessment and validation of a novel fast fully automated artificial intelligence left ventricular ejection fraction quantification software$

Echocardiography-a Journal of Cardiovascular Ultrasound and Allied Techniques, Feb 17, 2022

BackgroundQuantification of left ventricular ejection fraction (LVEF) by transthoracic echocardio... more BackgroundQuantification of left ventricular ejection fraction (LVEF) by transthoracic echocardiography (TTE) is operator‐dependent, time‐consuming, and error‐prone. LVivoEF by DIA is a new artificial intelligence (AI) software, which displays the tracking of endocardial borders and rapidly quantifies LVEF. We sought to assess the accuracy of LVivoEF compared to cardiac magnetic resonance imaging (cMRI) as the reference standard and to compare LVivoEF to the standard‐of‐care physician‐measured LVEF (MD‐EF) including studies with ultrasound enhancing agents (UEAs).MethodsIn 273 consecutive patients, we compared MD‐EF and AI‐derived LVEF to cMRI. AI‐derived LVEF was obtained from a non‐UEA four‐chamber view without manual correction. Thirty‐one patients were excluded: 25 had interval interventions or incomplete TTE or cMRI studies and six had uninterpretable non‐UEA apical views.ResultsIn the 242 subjects, the correlation between AI and cMRI was r = .890, similar to MD‐EF and cMRI with r = .891 (p = 0.48). Of the 126 studies performed with UEAs, the correlation of AI using the unenhanced four‐chamber view was r = .89, similar to MD‐EF with r = .90. In the 116 unenhanced studies, AI correlation was r = .87, similar to MD‐EF with r = .84. From Bland‐Altman analysis, LVivoEF underreported the LVEF with a bias of 3.63 ± 7.40% EF points compared to cMRI while MD‐EF to cMRI had a bias of .33 ± 7.52% (p = 0.80).ConclusionsCompared to cMRI, LVivoEF can accurately quantify LVEF from a standard apical four‐chamber view without manual correction. Thus, LVivoEF has the ability to improve and expedite LVEF quantification.

International Journal of Angiology, Mar 1, 2010

P ulmonary artery (PA) dilation is a minor cardiovascular criterion in the diagnosis of Marfan sy... more P ulmonary artery (PA) dilation is a minor cardiovascular criterion in the diagnosis of Marfan syndrome (1). A large PA aneurysm in Marfan syndrome has never been described, and the risk of PA dissection or rupture in such a patient is unknown. PA aneurysm is exceedingly rare and its natural history is unknown; therefore, clear guidelines for its management are lacking. We report an unusual case of Marfan syndrome complicated by PA thrombi, pulmonary hypertension and sudden death, underscoring the need for an aggressive management strategy.

$Research paper thumbnail of Diffractive Pomeranchukon Bootstrap and Inclusive Experiments$

Physical review, 1972

For the definition and normalization of oux amplitudes and the definition of the A and R paramete... more For the definition and normalization of oux amplitudes and the definition of the A and R parameters see the Appendix to R. D. Field, Jr. , Lawrence Berkeley Laboratory Report No. LBL-33, 1971 (unpublished).

Page 1. SOFTWARE QUALITY VIA RAPID PROTOTYPING Abhay K. Jain Peter D. Ting AT&T Bell Laborato... more Page 1. SOFTWARE QUALITY VIA RAPID PROTOTYPING Abhay K. Jain Peter D. Ting AT&T Bell Laboratories 0642 ABSTRACT We describe rapid prototyping as a software development process, which provides improved software ...

ACM Transactions on Database Systems, Dec 1, 1982

Query processing is investigated for relational databases distributed over several computers orga... more Query processing is investigated for relational databases distributed over several computers organized in a star network. Minimal response-time processing strategies are presented for queries involving the select, project, and join commands. These strategies depend on system parameters such as communication costs and different machine processing speeds; database parameters such as relation cardinality and file size; and query parameters such as estimates of the size and number of tuples in the result relation. The optimal strategies specify relation preparation processes, the shipping strategy, serial or parallel processing, and, where applicable, the site of join filtering and merging. Strategies for optimizing select and join queries have been implemented and tested.

IJC Heart & Vasculature, Oct 1, 2021

Background Although population-based studies have demonstrated racial heterogeneity in coronary a... more Background Although population-based studies have demonstrated racial heterogeneity in coronary artery calcium (CAC) burden, the degree to which such associations extend to percutaneous coronary intervention (PCI) cohorts remains poorly characterized. We sought to evaluate the associations between race/ethnicity and CAC in a PCI population. Methods This single center retrospective study analyzed 1025 patients with prior CAC who underwent PCI between January 1, 2012 and May 15, 2020. Patients were grouped as non-Hispanic White (NHW, N = 779), non-Hispanic Black (NHB, N = 81) and Hispanic (H, N = 165). Associations between race and CAC (Agatston units) were examined using negative binomial regression while adjusting for baseline parameters. Results Among the 1025 patients (mean age 65.8, 70% male) who underwent PCI, NHW, NHB, and H populations had median CAC scores of 760, 500, and 462 Agatston units, respectively (p < 0.0001). Hispanic patients displayed a higher burden of diabetes mellitus, hypertension and hyperlipidemia compared with other groups. After adjusting for baseline differences and compared with NHW, the inverse association between Hispanic and CAC persisted (β = -324.1, p < 0.0001) whereas differences were not significant for NHB (β = -51.5, p = 0.67). Conclusions Despite a higher risk clinical phenotype, Hispanic patients who underwent PCI had significantly lower CAC compared with non-Hispanic patients. Thus, current risk stratification models using universalized CAC scores may underestimate the risk for the Hispanic population. Race/ethnicity-informed CAC thresholds may better guide clinical decisions.

Physical Review, May 25, 1969

Page 1. PHYSICAL REVIEW VOLUM E 181, NUM B ER 5 25 MAY 1969 Mirage Trajectories* SHU —YUAN CHUt D... more Page 1. PHYSICAL REVIEW VOLUM E 181, NUM B ER 5 25 MAY 1969 Mirage Trajectories* SHU —YUAN CHUt Department of Physics, University of California, Riverside, California 9Z50Z AND CHUNG —I TAN Palmer Physical ...

$Research paper thumbnail of Inclusive experiments and a diffractive Pomeron bootstrap$

Physics Letters B, Jun 1, 1971

A diffractive Pomeron pole is derived from a multiperipheral bootstrap where the Pomeron is requi... more A diffractive Pomeron pole is derived from a multiperipheral bootstrap where the Pomeron is required to be exchanged only once. The predictions for inclusive experiments are presented and are shown to provide tests for the nature of the Pomeranchuk singularity.

Journal of the American College of Cardiology, May 1, 2021

Journal of Cardiac Failure, Sep 1, 2019

AIMS Increased psychosocial risk portends poor outcomes following heart transplantation. The Stan... more AIMS Increased psychosocial risk portends poor outcomes following heart transplantation. The Stanford Integrated Psychosocial Assessment for Transplantation (SIPAT) is a validated, psychosocial risk assessment tool that helps stratify candidates for transplantation. We assessed the impact of psychosocial factors as measured by the SIPAT on clinical outcomes following left ventricular assist device (LVAD) implantation at our institution. METHODS AND RESULTS A total of 115 individuals (mean age: 57 years, 75.6% men) who underwent LVAD implantation, for either bridge-to-transplant (63%) or destination therapy, from 2014-2016 were included for analysis. Correlations between SIPAT scores, baseline characteristics, and post-LVAD outcomes were assessed through a retrospective correlational design. At one-year post-LVAD, the higher risk SIPAT group had more emergency department visits, urgent clinic visits, and readmissions in univariate analysis [rate ratio 1.7 (95% CI 1.0-2.7, p=0.035]. After multivariate analysis, this association retained near-statistical significance [rate ratio 1.6 (95% CI 1.0-2.8, p=0.051)]. There was also a trend towards more device-associated infections [rate ratio 2.1 (95% CI 0.96-4.4, p=0.064]. There was no difference in incidence of other adverse events or one-year mortality between the two groups. CONCLUSIONS Higher psychosocial risk per SIPAT in patients undergoing LVAD implantation is associated with more emergency room visits, urgent visits and readmissions over 1 year, but not LVAD-related complications or mortality. Use of the SIPAT tool may help identify patients at higher risk for hospitalization and/or urgent care beyond traditional factors, but should not preclude LVAD implantation.

The Singapore family physician, 2019

Cardiovascular disease (CVD) is a leading global cause of mortality and morbidity. Risk assessmen... more Cardiovascular disease (CVD) is a leading global cause of mortality and morbidity. Risk assessment of asymptomatic individuals plays an important role in the primary prevention of CVD and its complications by guiding management decisions, in particular the decision to use statins or antiplatelet agents, as well as more controversially, the target level for risk factors such as hypertension and cholesterol. Timely and regular risk assessments also identify the development of physiological disturbances such as pre-hypertension, pre-diabetes, dyslipidaemias, clinical obesity and metabolic syndrome, which can be asymptomatic in the early stages, but may lead to increased risk for many ageing-related degenerative diseases, including CVD. These physiological mal-adaptations are remarkably responsive to behavioural lifestyle interventions at an early stage, and may be stabilised or even reversed without medications. This article describes the why and how of assessing CVD risk and a suggested framework for management, including the appropriate use of behavioural lifestyle interventions as first-line treatment. It also describes the various risk scores available, their differences and limitations and how to best use them in clinical practice. More research is required regarding the use of non-traditional and emerging markers of CVD risk such as carotid intima-media thickness, coronary artery calcium scoring, hsCRP, ankle brachial index, Apo-B, albuminuria, and how they may be incorporated into existing risk models.

A description is given of MUPLES, an integrated expert system tool for multipoint circuit layout.... more A description is given of MUPLES, an integrated expert system tool for multipoint circuit layout. A multipoint circuit is a telecommunication circuit that links more than two stations. The goal of MUPLES is to develop a prototype through combining graph-theoretic algorithms and expert heuristics, thus improving the productivity and quality of the traditional manual design that only considers facility constraints

AT&T technical journal, Mar 1, 1996

Competition and the fast pace of technological evolution in today's global telecommunications... more Competition and the fast pace of technological evolution in today's global telecommunications industry are placing unique demands on the flexibility of operations support software systems. The industry must be capable of rapidly introducing new services, technologies, and organizational structures. Networks must be capable of being partitioned for various applications and administered based on complex ownership relationships among the various network components. User permissions must be readily adaptable to reflect various combinations of services, network partitions, and work functions. To meet the time constraints of the market, telecommunications providers require the ability to configure systems to meet their needs without relying on traditional software development intervals and external software development resources. Traditional software development methodologies generally do not provide the timeliness and flexibility required. The Service Design and Inventory (SDI) system — also known as the Attribute Design Database System (ADDS) — has achieved a high degree of reusability and customer-configurable adaptability through a unique application of object-oriented technology.

Office, Mar 1, 1989

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