Digital Commons Network^™

An Analysis Of Non-Comparison Based Sorting Algorithms, Jacob M. Gomez, Edgar Aponte, Brad Isaacson

Publications and Research

Sorting algorithms put elements of a list into an order (e.g., numerical, alphabetical). Sorting is an important problem because a nontrivial percentage of all computing resources are devoted to sorting all kinds of lists. For our project, we implemented two non-comparison based sorting algorithms from pseudocode and compared them to various comparison based sorting algorithms. The two algorithms have their advantages and disadvantages as well as their unique features. We found that Radix Sort (which is a modified version of Counting Sort) was the most efficient of them all.

Remote Sensing & Land Surface Temperature From Satellite Observations, Isatu Jollah

Publications and Research

The Moderate Resolution Imaging Spectroradiometer (MODIS) instrument is designed and developed in 1995. • It is a critical instrument aboard Terra and Aqua satellites. Terra's orbit around the Earth is timed so that it crosses the equator from north to south in the morning, while Aqua crosses the equator from south to north in the afternoon. • Every 1 to 2 days, Terra MODIS and Aqua MODIS scan the entire Earth's surface, collecting data in groups of wavelengths. • In this research, a whole month of MODIS Land Surface Temperature data from both Aqua and Terra were explored and investigated.

The Living Breakwaters Pdr Efforts: Conceptual Scheduling, Calvin O. Walters Jr.

Publications and Research

On October 29, 2012, Superstorm Sandy caused nearly $19 billion in damages in New York City including 69,000 residential units across the five boroughs. This disaster precipitated a post-disaster-rebuilding (PDR) project including roughly $4.2 billion in a Community Development Block Grant allocated towards PDR projects. A portion of the grant was used to construct a living breakwater in Tottenville, Staten Island, consisting of a resiliency approach to risk reduction through erosion prevention, wave energy attenuation, and enhancement of ecosystems and social resiliency to improve resistance to storms for the community of Tottenville. The ridges of each breakwater are designed with …

A Social-Ecological-Technological Systems Framework For Urban Ecosystem Services, Timon Mcphearson, Elizabeth M. Cook, Marta Berbés-Blázquez, Chingwen Cheng, Nancy B. Grimm, Erik Andersson, Olga Barbosa, David G. Chandler, Heejun Chang, Mikhail V. Chester, Daniel L. Childers, Stephen R. Elser, Niki Frantzeskaki, Zbigniew Grabowski, Peter M. Groffman, Rebecca L. Hale, David M. Iwaniec, Nadja Kabisch, Christopher Kennedy, Samuel A. Markolf, A. Marissa Matsler, Lauren E. Mcphillips, Thaddeus R. Miller, Tischa A. Muñoz-Erickson, Emma Rosi, Tiffany G. Troxler

Advanced Science Research Center

As rates of urbanization and climatic change soar, decision-makers are increasingly challenged to provide innovative solutions that simultaneously address climate change impacts and risks and inclusively ensure quality of life for urban residents. Cities have turned to nature-based solutions to help address these challenges. Nature-based solutions, through the provision of ecosystem services, can yield numerous benefits for people and address multiple challenges simultaneously. Yet, efforts to mainstream nature-based solutions are impaired by the complexity of the interacting social, ecological, and technological dimensions of urban systems. This complexity must be understood and managed to ensure ecosystem-service provisioning is effective, equitable, and …

In The Face Of Death The Photographic Reevaluation Of The Death Mask During The Weimar Republic, Maresa Carney

Theses and Dissertations

During the Weimar Republic three books that shared the morbid subject of death masks, were published in short intervals and immediately enjoyed enormous popularity. The three publications Das Ewige Antlitz , Totenmasken, and Das Letzte Gesicht serve as an underpinning of the cultural and philosophical investigation of death mask photography

Exploration Of Chemical Space With Partial Labeled Noisy Student Self‑Training And Self‑Supervised Graph Embedding, Yang Liu, Hansaim Lim, Lei Xie

Publications and Research

Background Drug discovery is time-consuming and costly. Machine learning, especially deep learning, shows great potential in quantitative structure–activity relationship (QSAR) modeling to accelerate drug discovery process and reduce its cost. A big challenge in developing robust and generalizable deep learning models for QSAR is the lack of a large amount of data with high-quality and balanced labels. To address this challenge, we developed a self-training method, Partially LAbeled Noisy Student (PLANS), and a novel self-supervised graph embedding, Graph-Isomorphism-Network Fingerprint (GINFP), for chemical compounds representations with substructure information using unlabeled data. The representations can be used for predicting chemical properties such …

Calculus I With Pre-Calculus Syllabus, Ying Yu

Open Educational Resources

This informative syllabus provides students with detailed course information including class schedule, location of class meeting, the instructor’s office hours, course description, prerequisite and co-requisite, learning outcomes, course material, class expectations, homework assignments, assessments, grading policy, tutoring services on campus, ADA compliance, and an academic/course calendar. It acts as a roadmap to facilitate student success.

Driving Under The Influence Of Drugs: Status In New York City And Development Of New Analytical Tools, Kayla Marschke

Student Theses

Driving under the influence of drugs (DUID) cases have increased in recent years. According to NHTSA, drug use among fatally injured drivers who were tested for drugs rose from 25% in 2007 to 61.4% in 2020. Knowing what drugs are used by the drivers and developing new analytical tools to detect them are essential to prevent this type of cases. The goals of this study were two-fold: 1) To investigate the prevalence of drugs and drug combinations in New York City based on data provided by the Office Chief Medical Examiner (2018-2019); 2) To develop and validate an analytical method …

Evaluation Of A Technology Tool Assignment & Scoring Guide, Alanna Gibbons

Open Educational Resources

The goal of this assignment is for students to explore how technology can be used to enhance student learning and strengthen student appreciation of the mathematical content they are studying. This assignment asks students to identify a technology resource/tool and evaluate its applicability to study at the secondary school level.

Dissociative Excitation, Ionization, And Fragmentation Processes For Nitrogen, Oxygen, Methane, And Water Molecules By Electron Bombardment, M. Gochitashvili, R. Lomsazde, D. Kuparashvili, O. Taboridze, Roman Ya. Kezerashvili

Publications and Research

Electron–impact ionization and fragmentation of molecules are investigated by the chromatography mass-spectrometry device. While the excitation processes are investigated by an optical spectroscopy method. The spectral analysis is performed in the vacuum ultraviolet 50-130 nm spectral regions. The absolute value of the fragmentation cross-section in the dissociative ionization and excitation processes is determined. Measurements are performed in the electron energy range 25-120eV for ionization and 200-500eV for excitation processes respectively.

A Role For Myosin Ii Clusters And Membrane Energy In Cortex Rupture For Dictyostelium Discoideum, Emmanuel Asante-Asamani, Daniel Grange, Devarshi Rawal, Zully Santiago, John Loustau, Derrick Brazill

Publications and Research

Blebs, pressure driven protrusions of the cell membrane, facilitate the movement of eukaryotic cells such as the soil amoeba Dictyostelium discoideum , white blood cells and cancer cells. Blebs initiate when the cell membrane separates from the underlying cortex. A local rupture of the cortex, has been suggested as a mechanism by which blebs are initiated. However, much clarity is still needed about how cells inherently regulate rupture of the cor- tex in locations where blebs are expected to form. In this work, we examine the role of mem- brane energy and the motor protein myosin II (myosin) in facilitating …

Superfluidity Of Dipolar Excitons In A Double Layer Of Α -T3 With A Mass Term, Oleg L. Berman, Godfrey Gumbs, Gabriel P. Martins, Paula Fekete

Publications and Research

We predict Bose-Einstein condensation and superfluidity of dipolar excitons, formed by electron-hole pairs in spatially separated gapped hexagonal α − T3 (GHAT3) layers. In the α − T3 model, the AB-honeycomb lattice structure is supplemented with C atoms located at the centers of the hexagons in the lattice. We considered the α − T3 model in the presence of a mass term which opens a gap in the energy-dispersive spectrum. The gap opening mass term, caused by a weak magnetic field, plays the role of Zeeman splitting at low magnetic fields for this pseudospin-1 system. The band structure of GHAT3 …

The Solar-Electric Sail: Application To Interstellar Migration And Consequences For Seti, Gregory Matloff

Publications and Research

The Solar-Electric Sail accelerates by reflecting positively charged solar wind ions. If it is used to propel an interstellar migration mission, its interstellar cruise velocity relative to the home star cannot exceed the solar wind velocity. In an effort to analytically determine interstellar cruise velocity for a 107 kg generation ship, a constant solar wind velocity within the heliosphere of a Sun-like star of 600 km/s is assumed. The solar wind proton density at 1 AU is also considered constant at 10 protons per cubic centimeter. Solar wind density is assumed to decrease with the inverse square of solar distance. …

Applied Math In Introductory Chemistry, Ji Kim, Grace Pai

Open Educational Resources

Students, particularly those who are non-science majors, often struggle with college-level science courses required for graduation due to the applied mathematics needed to successfully complete the course. This resource includes four activities on the topics of units and measurements, dimensional analysis, density, and gases. These topics were specifically designed to teach the mathematics embedded in these topics in a culturally responsive way. Throughout the activities, we incorporate these four elements of culturally relevant pedagogy (Ladson-Billings, 2009) in order to engage students in successfully solving basic mathematics in chemistry while promoting their interest in learning chemistry.

Sum Of Mobius Functions Over The Shifted Primes, Nelson Carella

Publications and Research

This article provides an asymptotic result for the summatory Mobius function ∑ p≤x μ(p + a) = O (x log−c x) over the shifted primes, where a ̸ = 0 is a fixed parameter, and c > 1 is a constant.

Early Pleistocene Large Mammals From Maka’Amitalu, Hadar, Lower Awash Valley, Ethiopia, John Rowan, Ignacio A. Lazagabaster, Christopher J. Campisano, Faysal Bibi, René Bobe, Jean-Renaud Boisserie, Stephen R. Frost, Tomas Getachew, Christopher C. Gilbert, Margaret E. Lewis, Sahleselasie Melaku, Eric Scott, Antoine Souron, Lars Werdelin, William H. Kimbel, Kaye E. Reed

Publications and Research

The Early Pleistocene was a critical time period in the evolution of eastern African mammal faunas, but fossil assemblages sampling this interval are poorly known from Ethiopia ’ s Afar Depression. Field work by the Hadar Research Project in the Busidima Formation exposures (~2.7 – 0.8 Ma) of Hadar in the lower Awash Valley, resulted in the recovery of an early Homo maxilla (A.L. 666-1) with associated stone tools and fauna from the Maka ’ amitalu basin in the 1990s. These assemblages are dated to ~2.35 Ma by the Bouroukie Tuff 3 (BKT-3). Continued work by the Hadar Research Project …

Evolution And Adaptations - Choose An Organism To Explore, Stephanie A. Rose

Open Educational Resources

Homework assignment for Principles of Environmental Science course for teachers.

To help students think about evolution and adaptations, and how organisms evolve to live in particular places and conditions.

Physics 315 (Medical Physics), Ronald Koder

Open Educational Resources

No abstract provided.

Physics 422 (Biophysics), Ronald Koder

Open Educational Resources

No abstract provided.

Syllabus Geo101, Yuri Gorokhovich

Open Educational Resources

Syllabus for courses Dynamic Earth (undergraduate course): GEO 101-81 and Earth Processes (graduate course): GEO 501-81. Open textbook used in both courses linked in the syllabus and available at the following link: https://pressbooks.cuny.edu/gorokhovich/

Cosmogenic Ages Indicate No Mis 2 Refugia In The Alexander Archipelago, Alaska, Caleb K. Walcott, Jason P. Briner, James F. Baichtal, Alia J. Lesnek, Joseph M. Licciardi

Publications and Research

The late-Pleistocene history of the coastal Cordilleran Ice Sheet remains relatively unstudied compared to chronologies of the Laurentide Ice Sheet. Yet accurate reconstructions of Cordilleran Ice Sheet extent and the timing of ice retreat along the Pacific Coast are essential for paleoclimate modeling, assessing meltwater contribution to the North Pacific, and determining the availability of ice-free land along the coastal Cordilleran Ice Sheet margin for human migration from Beringia into the rest of the Americas. To improve the chronology of Cordilleran Ice Sheet history in the Alexander Archipelago, Alaska, we applied 10Be and 36Cl dating to boulders and glacially sculpted …

Home Sweet Home? Examining Residential Instability And Preschoolers’ Early Mathematics Development, Marisha Kashyap

Publications and Research

In 2020, approximately 13% of all children under five experienced residential instability. Residential instability, also known as housing instability, is known to compromise the socio-emotional and behavioral development of young children. However, there is limited evidence documenting the effect of housing instability on preschoolers' cognitive and academic abilities, in particular the development of mathematics skills. The present literature review argues that unstable residential conditions have important implications for preschoolers’ early mathematics development. First, the current literature review explores the implications of residential instability for the early childhood developmental period. Then this review examines current studies on promotive and risk factors …

An Evaluation Of The Effect Of The Oxycontin® Reformulation On Unintentional Fatal And Non-Fatal Overdose, Daniel C. Beachler, Kelsey Hall, Renu Garg, Geetanjoli Banerjee, Ling Li, Luke Boulanger, Huseyin Yuce, Alexander M. Walker

Publications and Research

Objectives: OxyContin® was reformulated with a polyethylene oxide matrix in August 2010 to reduce the potential for intravenous abuse and for abuse by insufflation. The objective of this study was to evaluate the impact of OxyContin’s reformulation on overdose risk for individuals dispensed OxyContin in comparison to those dispensed other opioids under regular care. Methods: Three national insurance databases with National Death Index linkage identified OD in individuals with any dispensing of OxyContin or a primary comparator opioid (ER morphine, transdermal fentanyl, or methadone) between July 2008 through September 2015. A difference-in-differences design was used to compare the pre-post reformulation …

Geology Online Lab Activities An Open Educational Resource For Community College Students And Instructors, Rondi Davies

Open Educational Resources

The online geology lab for community college students was developed by Dr. Rondi Davies, a faculty member at Queensborough Community College, City University New York, during two years of forced online synchronous learning brought on by the COVID-19 pandemic. This open educational resource collects many of Dr. Davies’ favorite open-access materials and supplements them with her own work within a single, cohesive laboratory manual intended for two-year, non-major college students from the New York area.

Dr. Davies wanted to develop labs that were fun, engaging, and that excited students about the subject, were relevant to their lives, helped them to …

“I Can Math, Too!”: Reducing Math Anxiety In Stem-Related Courses Using A Combined Mindfulness And Growth Mindset Approach (Magma) In The Classroom, Tashana S. Samuel, Sebastien Buttet, Jared Warner

Publications and Research

Math anxiety has become an alarming social justice concern, as it results in negative academic consequences, contributes to disinterest and lack of persistence in STEM programs for underrepresented students, and limits their opportunities in STEM careers. According to research, this fear of math occurs long before students begin working on math problems. When high-math anxious students encounter math situations, anticipation anxiety consumes working memory capacity, inhibits learning, and causes them to severely underperform on mathematical tasks. However, very few studies have been conducted to embed psychological interventions in the classroom in an effort to mitigate both anticipation and execution anxiety. …

Committee On Academic Standing Minutes March 23, 2022, Bronx Community College Committee On Academic Standing

BCC Governance Archives

Minutes for the meeting of the Committee on Academic Standing on March 23, 2022.

Monitoring Sars-Cov-2 In Wastewater During New York City's Second Wave Of Covid-19: Sewershed-Level Trends And Relationships To Publicly Available Clinical Testing Data, Catherine Hoar, Francoise Chauvin, Alexander Clare, Hope Mcgibbon, Esmeraldo Castro, Samantha Patinella, Dimitrios Katehis, John J. Dennehy, Monica Trujillo, Davida S. Smyth, Andrea I. Silverman

Publications and Research

New York City's wastewater monitoring program tracked trends in sewershed-level SARS-CoV-2 loads starting in the fall of 2020, just before the start of the city's second wave of the COVID-19 outbreak. During a five-month study period, from November 8, 2020 to April 11, 2021, viral loads in influent wastewater from each of New York City's 14 wastewater treatment plants were measured and compared to new laboratory-confirmed COVID-19 cases for the populations in each corresponding sewershed, estimated from publicly available clinical testing data. We found significant positive correlations between viral loads in wastewater and new COVID-19 cases. The strength of the …

Growth Kinetics Determine The Polydispersity And Size Of Pbs And Pbse Nanocrystals, Michael P. Campos, Jonathan De Roo, Matthew W. Greenberg, Brandon M. Mcmurtry, Mark P. Hendricks, Ellie Bennett, Natalie Saenz, Matthew Y. Sfeir, Benjamin Abecassis, Sanjit K. Ghose, Jonathan S. Owen

Advanced Science Research Center

A library of thio- and selenourea derivatives is used to adjust the kinetics of PbE (E = S, Se) nanocrystal formation across a 1000-fold range (kr = 10−1 to 10−4 s−1), at several temperatures (80–120 °C), under a standard set of conditions (Pb : E = 1.2 : 1, [Pb(oleate)2] = 10.8 mM, [chalcogenourea] = 9.0 mM). An induction delay (tind) is observed prior to the onset of nanocrystal absorption during which PbE solute is observed using in situ X-ray total scattering. Density functional theory models fit to the X-ray pair distribution function (PDF) support a Pb2(μ2-S)2(Pb(O2CR)2)2 structure. Absorption spectra …

Non-Reciprocal Parity-Time Symmetry Breaking Based On Magneto-Optical And Gain/Loss Double Ring Resonators, Yuma Kawaguchi, Andrea Alù, Alexander B. Khanikaev

Advanced Science Research Center

In this paper, we explore the operation of a nonreciprocal non-Hermitian system consisting of a lossy magneto-optical ring resonator coupled to another ring resonator with gain and loss, and we demonstrate that such a system can exhibit non-reciprocity-based broken parity-time (PT) symmetry and supports one-way exceptional points. The nonreciprocal PT-phase transition is analyzed with the use of both analytical tools based on coupled-mode theory and two-dimensional finite element method simulations. Our calculations show that the response of the system strongly depends on the regime of operation – broken or preserved PT-symmetry. This response is leveraged to show that the system …

Divergent Water Requirements Partition Exposure Risk To Parasites In Wild Equids, Kaia J. Tombak, Laurel A. Easterling, Lindsay Martinez, Monica S. Seng, Liana F. Wait, Daniel I. Rubenstein

Publications and Research

For grazing herbivores, dung density in feeding areas is an important determinant of exposure risk to fecal- orally transmitted parasites. When host species share the same parasite species, a nonrandom distribution of their cumulative dung density and/or nonrandom ranging and feeding behavior may skew exposure risk and the relative selection pressure parasites impose on each host. The arid-adapted Grevy's zebra ( Equus grevyi ) can range more widely than the water-dependent plains zebra ( Equus quagga ), with which it shares the same species of gastrointestinal nematodes. We studied how the spatial distribution of zebra dung relates to ranging and …