نتایج جستجو برای: 1347

تعداد نتایج: 831  

Journal: :The Astronomical Journal 2023

Abstract We simulate the yield of small (0.5–4.0 R ⊕ ) transiting exoplanets around single mid-M and ultracool dwarfs (UCDs) in Nancy Grace Roman Space Telescope Galactic Bulge Time Domain Survey. consider multiple approaches for simulating M3–T9 sources within survey fields, including scaling local space densities using stellar population synthesis models. These independently predict ∼100,000 ...

Journal: :Journal of immunology 2000
K Kujime S Hashimoto Y Gon K Shimizu T Horie

Airway epithelial cells which are the initial site of influenza virus (IV) infection are suggested to participate in airway inflammatory response by expressing various cytokines including RANTES; however, the intracellular signal that regulates RANTES expression has not been determined. In the present study, we examined the role of p38 mitogen-activated protein (MAP) kinase, extracellular signa...

2008
Abhijit Banerjee Rukmini Banerji Esther Duflo Rachel Glennerster Stuti Khemani Abdul Latif Jameel

Participation of beneficiaries in the monitoring of public services is increasingly seen as a key to improving their efficiency. In India, the current government flagship program on universal primary education organizes both locally elected leaders and parents of children enrolled in public schools into committees and gives these groups powers over resource allocation, and monitoring and manage...

ژورنال: :مجله علوم کشاورزی ایران 1978
محمدعلی نژاد هاشمی علی ولی خوجینی

فرسایش آبی و حمل رسوب در رودخانه کرج بعلت آنکه شدید بود وکنترل آن مشکل می باشد. از عوامل مهم برنامه ریزی در حوضه آبریز آن بشمار می رود. در این مقاله نحوه ایجاد رسوبات ‘ حمل وانتقال آن ‘ رابطه بده رسوب با بده آب ‘ مقادیر رسوبات وتغییرات آن مورد بررسی قرار گرفته است. شعبات این رودخانه بعلت شیب زیاددر هنگام سیلابی گل آلود می گردد. باین ترتیب شعبات ومسل ها بطور متناوب مقدار قابل ملاحظه ای با ر رس...

1997
Dimitris Bertsimas Leonid Kogan Andrew W. Lo

Given a European derivative security with an arbitrary payo function and a corresponding set of underlying securities on which the derivative security is based, we solve the optimalreplication problem: nd a selfnancing dynamic portfolio strategy|involving only the underlying securities|that most closely approximates the payo function at maturity. By applying stochastic dynamic programming to th...

Journal: :Computing in Science and Engineering 1999
Dimitris Bertsimas Andrew W. Lo Paul Hummel

We derive dynamic optimal trading strategies that minimize the expected cost of trading blocks of securities over a xed time horizon. Given xed blocks si of shares of stock i to be traded within a nite number of periods T , i = 1; : : : ; n, and given price-impact functions that yield the execution price of an individual trade as a function of the shares of stock i traded and current market con...

2016
Myung-Jin Cha Seong Jin Jo Youngjin Cho Eue-Keun Choi Seil Oh

BACKGROUND AND OBJECTIVES Radiofrequency catheter ablation (RFCA) exposes patients to fixed angle radiation for extended periods of time. We investigated the incidence and characteristics of radiation-induced dermatitis (RID) associated with RFCA. SUBJECTS AND METHODS We screened 1347 consecutive patients from 2000 to 2011 who underwent RFCA for any indication and reviewed patients with derma...

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