Physical Sciences and Mathematics Commons^™

Lecture: Probability And Statistics - Basic Probability I - Week Three, Evan Agovino, Nyc Tech-In-Residence Corps

Open Educational Resources

Lecture for the course "CSC 21700: Probability and Statistics" delivered at the City College of New York in Spring 2019 by Evan Agovino as part of the Tech-in-Residence Corps program.

Lecture: Probability And Statistics - The Normal Distribution And Central Limit Theorem - Week Six, Evan Agovino, Nyc Tech-In-Residence Corps

Open Educational Resources

Lecture for the course "CSC 21700: Probability and Statistics" delivered at the City College of New York in Spring 2019 by Evan Agovino as part of the Tech-in-Residence Corps program.

Lecture: Probability And Statistics - Random Variables And Distribution - Week Five, Evan Agovino, Nyc Tech-In-Residence Corps

Open Educational Resources

Lecture for the course "CSC 21700: Probability and Statistics" delivered at the City College of New York in Spring 2019 by Evan Agovino as part of the Tech-in-Residence Corps program.

Lecture: Probability And Statistics - Introduction - Week One, Evan Agovino, Nyc Tech-In-Residence Corps

Open Educational Resources

Project Assignment for the course "CS 217 Probability and Statistics for Computer Science" delivered at City College in Spring 2019 by Evan Agovino as part of the Tech-in-Residence Corps program.

Comparative Clinical Outcomes Between Direct Oral Anticoagulants And Warfarin Among Elderly Patients With Non-Valvular Atrial Fibrillation In The Cms Medicare Population, Alpesh Amin, Oluwaseyi Dina, Allison Keshishian, Amol Dhamane, Anagha Nadkarni, Eric Carda, Cristina Russ, Lisa Rosenblatt, Jack Mardekian, Huseyin Yuce, Christine L. Baker

Publications and Research

Atrial fibrillation (AF) prevalence increases with age; > 80% of US adults with AF are aged ≥ 65 years. Compare the risk of stroke/systemic embolism (SE), major bleeding (MB), net clinical outcome (NCO), and major adverse cardiac events (MACE) among elderly non-valvular AF (NVAF) Medicare patients prescribed direct oral anticoagulants (DOACs) vs warfarin. NVAF patients aged ≥ 65 years who initiated DOACs (apixaban, dabigatran, and rivaroxaban) or warfarin were selected from 01JAN2013-31DEC2015 in CMS Medicare data. Propensity score matching was used to balance DOAC and warfarin cohorts. Cox proportional hazards models estimated the risk of stroke/SE, MB, NCO, and MACE. 37,525 …

Optical Detection And Storage Of Entanglement In Plasmonically Coupled Quantum-Dot Qubits, M. Otten, S.K. Gray, German Kolmakov V

Publications and Research

Recent proposals and advances in quantum simulations, quantum cryptography, and quantum communications substantially rely on quantum entanglement formation. Contrary to the conventional wisdom that dissipation destroys quantum coherence, coupling with a dissipative environment can also generate entanglement. We consider a system composed of two quantum-dot qubits coupled with a common, damped surface plasmon mode; each quantum dot is also coupled to a separate photonic cavity mode. Cavity quantum electrodynamics calculations show that upon optical excitation by a femtosecond laser pulse, entanglement of the quantum-dot excitons occurs, and the time evolution of the g(2) pair correlation function of the cavity photons …

Proceedings Of The Cuny Games Conference 5.0, Robert O. Duncan, Joe Bisz, Julie Cassidy, Kathleen Offenholley, Carolyn Stallard, Deborah Sturm, Anders A. Wallace

Publications and Research

The CUNY Games Network is an organization dedicated to encouraging research, scholarship and teaching in the developing field of games-based learning. We connect educators from every campus and discipline at CUNY and beyond who are interested in digital and non-digital games, simulations, and other forms of interactive teaching and inquiry-based learning. The CUNY Games Conference distills its best cutting-edge interactive presentations into a two-day event to promote and discuss game-based pedagogies in higher education, focusing particularly on non-digital learning activities that faculty can use in the classroom every day. The conference will include workshops lead by CUNY Games Organizers on …

A Multi-Criteria Gis Model For Suitability Analysis Of Locations Of Decentralized Wastewater Treatment Units: Case Study In Sulaimania, Iraq, Ako Rashed Hama, Rafea Hashim Al-Suhili, Zeren Jamal Ghafour

Publications and Research

Sulaimania is a City located in Kurdistan region in the north of Iraq. The city is facing a lack of water, and it will reach a very critical condition shortly. One of the potential solutions is to reuse the treated wastewater for non-direct human uses such as irrigation, washing, firefighting, groundwater recharging, and others. There is no sewage treatment plant in the city. The wastewater flows into a stream through some sewer outlets, and that causes big environmental issues. Decentralized wastewater treatment units (DTUs) are suggested to solve the issue. The treated wastewater will be used for the irrigation of …

Annihilator Dimers Enhance Triplet Fusion Upconversion, Andrew B. Pun, Samuel N. Sanders, Matthew Y. Sfeir, Luis M. Campos, Daniel N. Congreve

Publications and Research

Optical upconversion is a net process by which two low energy photons are converted into one higher energy photon. There is vast potential to exploit upconversion in applications ranging from solar energy and biological imaging to data storage and photocatalysis. Here, we link two upconverting chromophores together to synthesize a series of novel tetracene dimers for use as annihilators. When compared with the monomer annihilator, TIPS–tetracene, the dimers yield a strong enhancement in the triplet fusion process, also known as triplet–triplet annihilation, as demonstrated via a large increase in upconversion efficiency and an order of magnitude reduction of the threshold …

Self-Assembled Bismuth Selenide (Bi2se3) Quantum Dots Grown By Molecular Beam Epitaxy, Marcel S. Claro, Ido Levy, Abhinandan Gangopadhyay, David J. Smith, Maria C. Tamargo

Publications and Research

We report the growth of self-assembled Bi2se3 quantum dots (QDs) by molecular beam epitaxy on GaAs substrates using the droplet epitaxy technique. The QD formation occurs after anneal of Bismuth droplets under Selenium flux. Characterization by atomic force microscopy, scanning electron microscopy, X-ray diffraction, high-resolution transmission electron microscopy and X-ray reflectance spectroscopy is presented. Raman spectra confirm the QD quality. The quantum dots are crystalline, with hexagonal shape, and have average dimensions of 12-nm height (12 quintuple layers) and 46-nm width, and a density of 8.5 × 109 cm−2. this droplet growth technique provides a means to produce topological insulator …

Extraction Of Acids And Bases From Aqueous Phase To A Pseudoprotic Ionic Liquid, Nikolas Patsos, Karin Lewis, Francesco Picchioni, Mark N. Kobrak

Publications and Research

We report experiments on the extraction of acids and bases from an aqueous phase to a pseudoprotic ionic liquid phase consisting of an equimolar mixture of trihexylamine and octanoic acid. We observed the extraction of a wide range of acids and bases, and investigated the mechanism of extraction in detail. Our results confirmed the observation of the Hofmeister effect in these systems reported in our previous work, where the extent of the extraction of copper salts was significantly influenced by the interactions between extracted inorganic anions and the organic phase. Our results further demonstrated that the organic layer served as …

Allergen Sensitization And Asthma Outcomes Among World Trade Center Rescue And Recovery Workers, Belen Rojano, Erin West, Emily Federmann, Steven Markowitz, Denise Harrison, Laura Crowley, Paula Busse, Alex D. Federman, Juan P. Wisnivesky

Publications and Research

A large number of World Trade Center (WTC) rescue and recovery workers are affected by asthma. While physical and mental health comorbidities have been associated with poor asthma control in this population, the potential role of allergen sensitization is unknown. This study examined the association of indoor sensitization and exposure as a risk factor for increased asthma morbidity in WTC workers. We used data from a prospective cohort of 331 WTC workers with asthma. Sensitization to indoor allergens was assessed by measurement of antigen-specific serum immunoglobulin E (IgE) levels. We used validated tools to evaluate the exposure to indoor allergens. …

Expedition 381 Facies Associations, Lisa C. Mcneill, Donna J. Shillington, Gareth D. O. Carter, Jeremy D. Everest, Erwan Le Ber, Richard E. L. Collier, Aleksandra Cvetkoska, Gino De Gelder, Paula Diz, Mai-Linh Doan, Mary Ford, Robert L. Gawthorpe, Maria Geraga, Jack Gillespie, Romain Hemelsdaël, Emilio Herrero-Bervera, Mohammad Ismaiel, Liliane Janikian, Katerina Kouli, Shunli Li, Malka Leah Machlus, Marco Maffione, Carol Mahoney, Georgios Michas, Clint Miller, Casey W. Nixon, Sabire Asli Oflaz, Abah Philip Omale, Konstantinos Panagiotopoulos, Sofia Pechlivanidou, Marcie Purkey Phillips, Simone Sauer, Joana Seguin, Spyros Sergiou, Natalia V. Zakharova

Publications and Research

No abstract provided.

Site M0080, Lisa C. Mcneill, Donna J. Shillington, Gareth D. O. Carter, Jeremy D. Everest, Erwan Le Ber, Richard E. L. Collier, Aleksandra Cvetkoska, Gino De Gelder, Paula Diz, Mai-Linh Doan, Mary Ford, Robert L. Gawthorpe, Maria Geraga, Jack Gillespie, Romain Hemelsdaël, Emilio Herrero-Bervera, Mohammad Ismaiel, Liliane Janikian, Katerina Kouli, Shunli Li, Malka Leah Machlus, Marco Maffione, Carole Mahoney, Georgios Michas, Clint Miller, Casey W. Nixon, Sabire Asli Oflaz, Abah Philip Omale, Konstantinos Panagiotopoulos, Sofia Pechlivanidou, Marcie Purkey Phillips, Simone Sauer, Joana Seguin, Spyros Sergiou, Natalia V. Zakharova

Publications and Research

No abstract provided.

Site M0078, Lisa C. Mcneill, Donna J. Shillington, Gareth D. O. Carter, Jeremy D. Everest, Erwan Le Ber, Richard E. L. Collier, Aleksandra Cvetkoska, Gino De Gelder, Paula Diz, Mai-Linh Doan, Mary Ford, Robert L. Gawthorpe, Maria Geraga, Jack Gillespie, Romain Hemelsdaël, Emilio Herrero-Bervera, Mohammad Ismaiel, Liliane Janikian, Katerina Kouli, Shunli Li, Malka Leah Machlus, Marco Maffione, Carol Mahoney, Georgios Michas, Clint Miller, Casey W. Nixon, Sabire Asli Oflaz, Abah Philip Omale, Konstantinos Panagiotopoulos, Sofia Pechlivanidou, Marcie Purkey Phillips, Simone Sauer, Joana Seguin, Spyros Sergiou, Natalia V. Zakharova

Publications and Research

No abstract provided.

High-Resolution Record Reveals Climate-Driven Environmental And Sedimentary Changes In An Active Rift, Lisa C. Mcneill, Donna J. Shillington, Gareth D. O. Carter, Jeremy D. Everest, Robert L. Gawthorpe, Clint Miller, Marcie P. Phillips, Richard E. Ll. Collier, Aleksandra Cvetkoska, Gino De Gelder, Paula Diz, Mai-Linh Doan, Mary Ford, Maria Geraga, Jack Gillespie, Romain Hemelsdael, Emilio Herrero-Bervera, Mohammad Ismaiel, Liliane Janikian, Katerina Kouli, Erwan Le Ber, Shunli Li, Marco Maffione, Carol Mahoney, Malka L. Machlus, Georgios Michas, Casey W. Nixon, Sabire Asli Oflaz, Abah P. Omale, Kostas Panagiotopoulos, Sofia Pechlivanidou, Simone Sauer, Joana Seguin, Spyros Sergiou, Natalia V. Zakharova, Sophie Green

Publications and Research

Young rifts are shaped by combined tectonic and surface processes and climate, yet few records exist to evaluate the interplay of these processes over an extended period of early rift-basin development. Here, we present the longest and highest resolution record of sediment flux and paleoenvinronmental changes when a young rift connects to the global concerns. New results from International Ocean Discovery Program (IODP) Expedition 381 in the Corinth Rift shows 10s-100s of kyr cyclic variations in basin paleoenvironment as eustatic sea level fluctuated with respect to sills bounding this semi-isolated basin, and reveal substantial corresponding changes in the volume and …

Expedition 381 Methods, Lisa C. Mcneill, Donna J. Shillington, Gareth D. O. Carter, Jeremy D. Everest, Erwan Le Ber, Richard E. L. Collier, Aleksandra Cvetkoska, Gino De Gelder, Paula Diz, Mai-Linh Doan, Mary Ford, Robert L. Gawthorpe, Maria Geraga, Jack Gillespie, Romain Hemelsdaël, Emilio Herrero-Bervera, Mohammad Ismaiel, Liliane Janikian, Katerina Kouli, Shunli Li, Malka Leah Machlus, Marco Maffione, Carol Mahoney, Georgios Michas, Clint Miller, Casey W. Nixon, Sabire Asli Oflaz, Abah Philip Omale, Konstantinos Panagiotopoulos, Sofia Pechlivanidou, Marcie Purkey Phillips, Simone Sauer, Joana Seguin, Spyros Sergiou, Natalia V. Zakharova

Publications and Research

No abstract provided.

Expedition 381 Summary, Lisa C. Mcneill, Donna J. Shillington, Gareth D. O. Carter, Jeremy D. Everest, Erwan Le Ber, Richard E. L. Collier, Aleksandra Cvetkoska, Gino De Gelder, Paula Diz, Mai-Linh Doan, Mary Ford, Robert L. Gawthorpe, Maria Geraga, Jack Gillespie, Romain Hemelsdaël, Emilio Herrero-Bervera, Mohammad Ismaiel, Liliane Janikian, Katerina Kouli, Shunli Li, Malka Leah Machlus, Marco Maffione, Carol Mahoney, Georgios Michas, Clint Miller, Casey W. Nixon, Sabire Asli Oflaz, Abah Philip Omale, Konstantinos Panagiotopoulos, Sofia Pechlivanidou, Marcie Purkey Phillips, Simone Sauer, Joana Seguin, Spyros Sergiou, Natalia V. Zakharova

Publications and Research

The primary objective of International Ocean Discovery Program Expedition 381 was to retrieve a record of early continental rifting and basin evolution from the Corinth rift, central Greece. Continental rifting is fundamental for the formation of ocean basins, and active rift zones are dynamic regions of high geohazard potential. However, the detailed spatial and temporal evolution of a complete rift system needed to understand rift development from the fault to plate scale is poorly resolved. In the active Corinth rift, deformation rates are high, the recent synrift succession is preserved and complete offshore, and earlier rift phases are preserved onshore. …

Site M0079, Lisa C. Mcneill, Donna J. Shillington, Gareth D. O. Carter, Jeremy D. Everest, Erwan Le Ber, Richard E. L. Collier, Aleksandra Cvetkoska, Gino De Gelder, Paula Diz, Mai-Linh Doan, Mary Ford, Robert L. Gawthorpe, Maria Geraga, Jack Gillespie, Romain Hemelsdaël, Emilio Herrero-Bervera, Mohammad Ismaiel, Liliane Janikian, Katerina Kouli, Shunli Li, Malka Leah Machlus, Marco Maffione, Carol Mahoney, Georgios Michas, Clint Miller, Casey W. Nixon, Sabire Asli Oflaz, Abah Philip Omale, Konstantinos Panagiotopoulos, Sofia Pechlivanidou, Marcie Purkey Phillips, Simone Sauer, Joana Seguin, Spyros Sergiou, Natalia V. Zakharova

Publications and Research

No abstract provided.

Data Report: Summary Of Xrf Scanning On Core Sections, Iodp Expedition 381, Lisa C. Mcneill, Gino De Gelder, Malka Leah Machlus, N. Fabregas, Carol Mahoney, Sofia Pechlivanidou, Joana Seguin, Robert L. Gawthorpe, Donna J. Shillington, Gareth D. O. Carter, Jeremy D. Everest

Publications and Research

No abstract provided.

Cs04all: Cryptography Module, Hunter R. Johnson

Open Educational Resources

Cryptography module

This archive contains a series of lessons on cryptography suitable for use in a CS0 course. The only requirement is familiarity with Python, particularly dictionaries, lists, and file IO. It is also assumed that students know how to create stand-alone Python programs and interact with them through the terminal. Most of the work is done in Jupyter notebooks.

The material found in the notebooks is a combination of reading material, exercises, activities and assignments. Below are descriptions of each lesson or assignment and links to notebooks on Cocalc. The same files are available for batch download in this …

Cs04all: Command Line Python, Hunter R. Johnson

Open Educational Resources

Command Line Tutorial

Students are presented with information relating to stand alone Python programs, stdin, stdout, and command line arguments. This is a lab exercise. After completion students should be able to create executable Python programs which can accept input from stdin or command line arguments.

Please begin with the READ_ME file.

https://cocalc.com/share/bde99afd-76c8-493d-9608-db9019bcd346/171/stdin?viewer=share/

This OER material was produced as a result of the CS04ALL CUNY OER project

Cs04all: Machine Learning Module, Hunter R. Johnson

Open Educational Resources

These are materials that may be used in a CS0 course as a light introduction to machine learning.

The materials are mostly Jupyter notebooks which contain a combination of labwork and lecture notes. There are notebooks on Classification, An Introduction to Numpy, and An Introduction to Pandas.

There are also two assessments that could be assigned to students. One is an essay assignment in which students are asked to read and respond to an article on machine bias. The other is a lab-like exercise in which students use pandas and numpy to extract useful information about subway ridership in NYC. …

Cs04all: Natural Language Processing Project, Hunter R. Johnson

Open Educational Resources

In this archive there are two activities/assignments suitable for use in a CS0 or Intro course which uses Python.

In the first activity, students are asked to "fill in the code" in a series of short programs that compute a similarity metric (cosine similarity) for text documents. This involves string tokenization, and frequency counting using Python string methods and datatypes.

https://cocalc.com/share/bde99afd-76c8-493d-9608-db9019bcd346/171/Proj1?viewer=share/

In the second activity (taken directly from Think Python 2e) students use a pronunciation dictionary to solve a riddle involving homophones.

https://cocalc.com/share/bde99afd-76c8-493d-9608-db9019bcd346/171/Dicts2?viewer=share/

This OER material was produced as a result of the CS04ALL CUNY OER project

Cs04all: List Comprehensions, Hunter R. Johnson

Open Educational Resources

List Comprehensions

This is a tutorial on list comprehensions in Python, suitable for use in an Intro or CS0 course. We also briefly mention set comprehensions and dictionary comprehensions.

https://cocalc.com/share/bde99afd-76c8-493d-9608-db9019bcd346/171/list_comprehensions?viewer=share/

This OER material was produced as a result of the CS04ALL CUNY OER project

Rubik's Cube: A Visual And Tactile Learning Of Algorithms And Patterns, Lawrence Muller

Open Educational Resources

This is a classroom activity report on teaching algorithms as part of a second course in computer programming. Teaching an algorithm in an introductory level programming class is often a dry task for the instructor and the rewards for the student are abstract. To make the learning of algorithms and software more rewarding, this assignment employs a Rubik’s cube.

Culture Clubs: Processing Speech By Deriving And Exploiting Linguistic Subcultures, David Guy Brizan

Dissertations, Theses, and Capstone Projects

Spoken language understanding systems are error-prone for several reasons, including individual speech variability. This is manifested in many ways, among which are differences in pronunciation, lexical inventory, grammar and disfluencies. There is, however, a lot of evidence pointing to stable language usage within subgroups of a language population. We call these subgroups linguistic subcultures.

The two broad problems are defined and a survey of the work in this space is performed. The two broad problems are: linguistic subculture detection, commonly performed via Language Identification, Accent Identification or Dialect Identification approaches; and speech and language processing tasks taken which may see …

Solvation Thermodynamic Mapping In Computer Aided Drug Design, Steven Ramsey

Dissertations, Theses, and Capstone Projects

The displacement of water from surfaces upon biomolecular recognition and association makes a significant contribution to the free energy changes of these processes. We therefore posit that accurate characterization of local structural and thermodynamic molecular water properties can improve computational model accuracy and predictivity of recognition and association processes. In this thesis, we discuss Solvation Thermodynamic Mapping (STM) methods that we have developed using inhomogeneous fluid solvation theory (IST) to better characterize active site water structural and thermodynamic properties on protein surfaces and the open source tools that we have developed, GIST-CPPTRAJ and SSTMap, which implement these methods which we …

Potential Degradation Of Hexabromocyclododecane (Hbcdd) In Sediments: Stereoisomer Specific Reaction Of Hbcdd With Reduced Sulfur Species Or Fe(Ii) Bound To Iron Oxides, Xianmiao Zhang

Dissertations, Theses, and Capstone Projects

The individual degradation rates of the three dominant stereoisomers (alpha, beta, gamma) of hexabromocyclododecane (HBCDD) with bisulfide and polysulfides were investigated at pH 9-10 in methanol/water solutions at two different temperatures (25 °C and 40 °C). alpha-HBCDD reacts significantly slower than beta-HBCDD and gamma-HBCDD. It was also observed that the reaction of HBCDD with polysulfides is faster than with bisulfide. For the reaction of HBCDD with bisulfide, the experiments were performed in 20% water/80% methanol, 50% water/50% methanol and 80% water/20% methanol at 40 °C. It was determined that the solvent polarity affects the reaction and the second-order rate constants …

Magnetic Resonance Studies Of Free Radicals Generation And Their Impact In Different Polymers, Sunita Humagain

Dissertations, Theses, and Capstone Projects

Studies of free radicals in the physics, chemistry, biology, and materials science have contributed to advancements in those fields. The presence of radicals can damage the material and system in some instances and, in some cases, they may enhance the property of the material as well. Knowledge of free radical transformations helps in resilience of certain polymers and inhibition of the oxidation of food and medicine. In this thesis, using the magnetic resonance techniques, EPR and NMR, the generation of free radicals and their effect on the structure of the material is being studied.

Kapton Polyimide (PI, Kapton®) used in …