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Ron Blankstein,Ankur Gupta,Jamal S. Rana,Khurram Nasir 대한내분비학회 2017 Endocrinology and metabolism Vol.32 No.1
Over the last two decades coronary artery calcium (CAC) scanning has emerged as a quick, safe, and inexpensive method to detectthe presence of coronary atherosclerosis. Data from multiple studies has shown that compared to individuals who do not have anycoronary calcifications, those with severe calcifications (i.e., CAC score >300) have a 10-fold increase in their risk of coronary heartdisease events and cardiovascular disease. Conversely, those that have a CAC of 0 have a very low event rate (~0.1%/year), withdata that now extends to 15 years in some studies. Thus, the most notable implication of identifying CAC in individuals who do nothave known cardiovascular disease is that it allows targeting of more aggressive therapies to those who have the highest risk of havingfuture events. Such identification of risk is especially important for individuals who are not on any therapies for coronary heartdisease, or when intensification of treatment is being considered but has an uncertain role. This review will highlight some of the recentdata on CAC testing, while focusing on the implications of those findings on patient management. The evolving role of CAC inpatients with diabetes will also be highlighted.
Ory Jesse,Tradewell Michael B.,Blankstein Udi,Lima Thiago F.,Nackeeran Sirpi,Gonzalez Daniel C.,Nwefo Elie,Moryousef Joseph,Madhusoodanan Vinayak,Lau Susan,Jarvi Keith,Ramasamy Ranjith 대한남성과학회 2022 The World Journal of Men's Health Vol.40 No.4
Purpose: Varicocele repair is recommended in the presence of a clinical varicocele together with at least one abnormal semen parameter, and male infertility. Unfortunately, up to 50% of men who meet criteria for repair will not see meaningful benefit in outcomes despite successful treatment. We developed an artificial intelligence (AI) model to predict which men with varicocele will benefit from treatment. Materials and Methods: We identified men with infertility, clinical varicocele, and at least one abnormal semen parameter from two large urology centers in North America (Miami and Toronto) between 2006 and 2020. We collected pre and postoperative clinical and hormonal data following treatment. Clinical upgrading was defined as an increase in sperm concentration that would allow a couple to access previously unavailable reproductive options. The tiers used for upgrading were: 1–5 million/mL (ICSI/IVF), 5–15 million/mL (IUI) and >15 million/mL (natural conception). Thus moving from ICSI/IVF to IUI, or from IUI to natural conception, would be considered an upgrade. AI models were trained and tested using R to predict which patients were likely to upgrade after surgery. The model sorted men into categories that defined how likely they were to upgrade after surgery (likely, equivocal, and unlikely). Results: Data from 240 men were included from both centers. A total of 45.6% of men experienced an upgrade in sperm concentration following surgery, 48.1% did not change, and 6.3% downgraded. The data from Miami were used to create a random forest model for predicting upgrade in sperm concentration. On external validation using Toronto data, the model accurately predicted upgrade in 87% of men deemed likely to improve, and in 49% and 36% of men who were equivocal and unlikely to improve, respectively. Overall, the personalized prediction for patients in the validation cohort was accurate (AUC 0.72). Conclusions: A machine learning model performed well in predicting clinically meaningful post-varicocelectomy sperm parameters using pre-operative hormonal, clinical, and semen analysis data. To our knowledge, this is the first prediction model to show the utility of hormonal data, as well as the first to use machine learning models to predict clinically meaningful upgrading. This model will be published online as a clinical calculator that can be used in the preoperative counseling of patients.
Bhupathi, Pradeep,Hwang, Jungseek,Martin, Rodica M.,Blankstein, Jackson,Jaworski, Lukas,Mulders, Norbert,Tanner, David B.,Lee, Yoonseok The Optical Society 2009 Optics express Vol.17 No.13
<P>Optical transmission measurements were made on 98% porosity silica aerogel samples under various degrees of uniaxial strain. Uniaxially compressed aerogels exhibit large birefringence, proportional to the amount of compression, up to the 15% strain studied. The birefringence is mostly reversible and reproducible through multiple compression-decompression cycles. Our study demonstrates that uniaxially strained high porosity aerogels can be used as tunable waveplates in a broad spectral range.</P>
Gu G. M.,Chae K. Y.,Cha S. M.,Kwag M. S.,Kim M. J.,Allen J.,O’Malley P. D.,Boeltzig A.,Clark A. M.,Frentz B.,Kolk B. V.,Blankstein D.,Bardayan D. W.,Wilkinson J.,Seymour G.,Howard K. B.,Renaud M.,Hall 한국물리학회 2024 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.85 No.3
The 24Mg(훼,p) 27Al reaction was measured using the solenoid spectrometer for nuclear astrophysics at the University of the Notre Dame to study the astrophysical 24Mg(훼,p) 27Al reaction rate. Alpha beams from the 10-MV FN tandem accelerator impinged on 24Mg solid targets which were made using the vacuum evaporation method on 12C foils. A total of 43 beam energies were used. Recoiling protons from the 24Mg(훼,p) 27Al reaction were detected using a double-sided position sensitive silicon detector array mounted on the solenoid. Energies, times of fight, and fight distances of particles were measured for particle identifcation. Protons associated with a wide range of excitation energies Ex = 12.42–14.44 MeV in 28Si were identifed.