Digital Commons Network^™

Structural Studies Of Biopolymers Using Computer Simulations, Optical And Magnetic Spectroscopy, Subhasish Chatterjee

Dissertations, Theses, and Capstone Projects

Biopolymers are essential components of numerous natural and synthetic macromolecular assemblies. In the present study, the structural properties of biopolymers ranging from fungal melanins to synthetic nucleic acids were investigated using spectroscopic methods and theoretical modeling. (1) Computational modeling and molecular dynamics simulations were used to study the structural properties of a short single-stranded (ss) DNA. The dependence of the conformational stability and flexibility of the ssDNA on the thermodynamic conditions of the system was demonstrated. (2) Time-resolved fluorescence spectroscopy involving an organic donor-quencher pair was utilized to study the conformational properties of Y-shaped DNA. Results highlighted the different distances …

A-State Celebrates Contributions To Science By Darwin, Lincoln, Aldemaro Romero Jr.

Publications and Research

No abstract provided.

Qualitative And Quantitative Methods In Occupational-Stress Research, Irvin Sam Schonfeld, Edwin Farrell

Publications and Research

The paper examined the ways in which qualitative and quantitative methods support each other in research on occupational stress. Qualitative methods include (a) eliciting from unconstrained descriptions of work experiences, (b) careful first-hand observations at the workplace, and (c) participant‑observers describing “from the inside” a particular work experience. The paper shows how qualitative research stimulates theory development, hypothesis generation, and the identification of job stressors and coping responses. The limitations of qualitative research, particularly in the area of verification, are also described.

A Symbolic Sonification Of L-Systems, Adam James Wilson

Publications and Research

This paper describes a simple technique for the sonification of branching structures in plants. The example is intended to illustrate a qualitative definition of best practices for sonification aimed at the production of musical material. Visually manifest results of tree growth are modelled and subsequently mapped to pitch, time, and amplitude. Sample results are provided in symbolic music notation.

On The Dynamics Of Quasi-Self-Matings Of Generalized Starlike Complex Quadratics And The Structure Of The Mated Julia Sets, Ross Flek

Dissertations, Theses, and Capstone Projects

It has been shown that, in many cases, Julia sets of complex polynomials can be "glued" together to obtain a new Julia set homeomorphic to a Julia set of a rational map; the dynamics of the two polynomials are reflected in the dynamics of the mated rational map. Here, I investigate the Julia sets of self-matings of generalized starlike quadratic polynomials, which enjoy relatively simple combinatorics. The points in the Julia sets of the mated rational maps are completely classified according to their topology. The presence and location of buried points in these Julia sets are addressed. The interconnections between …

The Orchard Crossing Number Of An Abstract Graph, Elie Feder, David Garber

Publications and Research

.We introduce the Orchard crossing number, which is defined in a similar way to the well-known rectilinear crossing number. We compute the Orchard crossing number for some simple families of graphs. We also prove some properties of this crossing number.

Moreover, we define a variant of this crossing number which is tightly connected to the rectilinear crossing number, and compute it for some simple families of graphs.

Volunteers: Beyond Government Partners, Maria J. D'Agostino

Publications and Research

Over the past several years, practitioners and academics have expressed concern about the deteriorating morale and effectiveness of the federal civil service, given its aging workforce and the competition with the private sector for human capital. Recruiting qualified public servants is complicated by the negative perception of government. Attacks by politicians of all sides have contributed to a negative stereotype of the American civil service. Therefore, finding new ways to recruit and retain the best-qualified young graduates has become critical. This paper reports on an untapped resource – volunteers, explores the youth volunteer activity that occurs in the federal government, …

Computer-Aided Reasoning About Knowledge And Justifications, Natalia Novak

Dissertations, Theses, and Capstone Projects

In the first Chapter we compare two well-known type-based computer frameworks for computer aided logical reasoning and verification: MetaPRL and Coq. In particular, we implement in MetaPRL the Calculus of Inductive Constructions which is the theoretical base for Coq. This work has shown the common points of MetaPRL and Coq, and revealed their principal methodological differences. A possible application of this work is a possibility to perform re-validation in MetaPRL of the existing library of Coq proofs which could help to build more trust in the latter.

Chapter 2 is the main contribution of the dissertation. It contains the description …

Beyond Observation: Literature And Science In Kafka, Rilke, Mann And Musil, Katya Ilina

Dissertations, Theses, and Capstone Projects

The relationship between science and literature is an expanding area of scholarly interest which remains underrepresented within the field of Germanistik. This dissertation will attempt to close the gap by focusing on the interactions between the selected works of Franz Kafka, Rainer Maria Rilke, Thomas Mann, and Robert Musil, and the scientific outlooks which began to emerge in the nineteenth century primarily by focusing on the concept of observation. Observation is a concept important for the period of my investigation because it signified a major shift in consciousness. The prior facile division into impartial experimenter and observed phenomenon, so characteristic …

Hostos Community College Academic Bulletin 2009-2010, Hostos Community College

College Bulletins

This is the official college catalog for 2009-2010. It contains course descriptions as well as information on degree programs, college resources and services, financial aid, admissions, and the academic calendar.

Phenyl-Substituted Siloxane Hybrid Gels That Soften Below 140[Degrees]C, Andrei Jitianu, Glenn Amatucci, Lisa C. Klein

Publications and Research

A characteristic of so-called melting gels is that the gels, which are rigid at room temperature, are able to soften and resoften at temperatures around 110 [degrees]C. However, after consolidation at temperatures higher than 150 [degrees]C, the gels no longer resoften. Two systems of melting gels were investigated: phenyltrimethoxysilane (PhTMS)–diphenyldimethoxysilane (DPhDMS) and phenyltriethoxysilane (PhTES)–diphenyldiethoxysilane (DPhDES). The influence of disubstituted versus monosubstituted alkoxide on the softening behavior and the temperature of decomposition was studied. The consolidation temperature increased as the amount of disubstituted alkoxide increased, while the decomposition temperature increased only slightly. In general, the ethoxy-containing gels (maximum at 150[degrees]C) consolidated …

Biodegradation Of Fuel Oxygenates In Northeastern United States Aquifers With An Analysis Of Underground Storage Tank Leaks, Gordon Hinshalwood

Dissertations, Theses, and Capstone Projects

During the past decade the application of monitored natural attenuation has become one of the predominant technologies used in the remediation of gasoline spills impacting subsurface soils and groundwater. The success of this method has depended, for the most part, on the biodegradation of those gasoline constituents that dissolve into groundwater and transport with the groundwater most readily.

One of the most mobile components of gasoline formulations during the past 20 years has been methyl tertiary butyl ether (MTBE), which has traditionally been viewed in both the scientific and the regulatory communities as relatively recalcitrant to biodegradation. However, cases of …

On The Dynamics Of Quasi-Self-Matings Of Generalized Starlike Complex Quadratics And The Structure Of The Mated Julia Sets, Ross Flek

Dissertations, Theses, and Capstone Projects

It has been shown that, in many cases, Julia sets of complex polynomials can be "glued" together to obtain a new Julia set homeomorphic to a Julia set of a rational map; the dynamics of the two polynomials are reflected in the dynamics of the mated rational map. Here, I investigate the Julia sets of self-matings of generalized starlike quadratic polynomials, which enjoy relatively simple combinatorics. The points in the Julia sets of the mated rational maps are completely classified according to their topology. The presence and location of buried points in these Julia sets are addressed. The interconnections between …

Quirky, Not Quacky: Quantum Computing For Librarians, Jill Cirasella

Publications and Research

This slideshow introduces librarians and non-scientists to the relatively young field of quantum computing.

Curriculum Committee Minutes December 11, 2008, Bronx Community College Curriculum Committee

BCC Governance Archives

Minutes for the meeting of the Curriculum Committee on December 11, 2008.

An Analysis Of Entries In The First Tac Market Design Competition, Jinzhong Niu, Kai Cai, Peter Mcburney, Simon Parsons

Publications and Research

This paper presents an analysis of entries in the first TAC Market Design Competition final that compares the entries across several scenarios. The analysis complements previous work analyzing the 2007 competition, demonstrating some vulnerabilities of entries that placed highly in the competition. The paper also suggests a simple strategy that would have performed well.

The Future Of General Education At John Jay College Of Criminal Justice, John Jay College Of Criminal Justice, John Jay College Of Criminal Justice - Task Force On General Education

Reports and Publications from John Jay College

The Task Force on General Education was convened in the Spring of 2007 by Jane Bowers, who was then Dean of Undergraduate Studies and is now Provost and Senior Vice President for Academic Affairs. Dr. Bowers charged the group to study General Education at John Jay, at our sister CUNY campuses, and at colleges and universities around the country and to produce a report to the community that would help us to assess the status of our nearly four-decades-old General Education program in the contexts of a national General Education reform movement and a parallel CUNY-wide initiative. This report is …

Where Do Latinos Work? Occupational Structure And Mobility Within New York City’S Latino Population, 1990 - 2006, Laura Limonic

Center for Latin American, Caribbean, and Latino Studies

Introduction: This report examines the difference in occupational changes across racial and ethnic groups in New York City as well as across Latino origin groups from 1990 to 2006.

Methods: Data on Latinos and other racial/ethnic groups were obtained from the U.S. Census Bureau American Community Survey, reorganized for public use by the Minnesota Population Center, University of Minnesota, IPUMSusa. Cases in the dataset were weighted and analyzed to produce population estimates. All figures pertain to individuals 16 years of age or older.

Results: While there has been an overall increase in employment gains in the management sector, which includes …

The Ticker, October 27, 2008

The Ticker

The Ticker is the student newspaper of Baruch College. It has been published continuously since 1932, when the Baruch College campus was the School of Business and Civic Administration of the City College of New York.

College Senate Minutes October 2, 2008, Bronx Community College Senate

BCC Governance Archives

Minutes for the meeting of the College Senate on October 2, 2008.

In Transit Vol 3 Fall 2008, Laguardia Community College

LaGuardia Community College Publications

In Transit is the LaGuardia Journal on Teaching and Learning. It is published by the Center for Teaching and Learning at LaGuardia Community College, CUNY.

On The Assessment Of Pointcut Design In Evolving Aspect-Oriented Software, Raffi Khatchadourian, Phil Greenwood, Awais Rashid

Publications and Research

No abstract provided.

The Ticker, September 22, 2008

The Ticker

The Ticker is the student newspaper of Baruch College. It has been published continuously since 1932, when the Baruch College campus was the School of Business and Civic Administration of the City College of New York.

Catalog 2008-2009, Kingsborough Community College

Course Catalogs

No abstract provided.

Rejuvenate Pointcut: A Tool For Pointcut Expression Recovery In Evolving Aspect-Oriented Software, Raffi Khatchadourian, Awais Rashid

Publications and Research

Aspect-oriented programming (AOP) strives to localize the scattered and tangled implementations of crosscutting concerns (CCCs) by allowing developers to declare that certain actions (advice) should be taken at specific points (join points) during the execution of software where a CCC (an aspect) is applicable. However, it is non-trivial to construct optimal pointcut expressions (a collection of join points) that capture the true intentions of the programmer and, upon evolution, maintain these intentions. We demonstrate an AspectJ source-level inferencing tool called rejuvenate pointcut which helps developers maintain pointcut expressions over the lifetime of a software product. A key insight into the …

The Contribution Of Advective Fluxes To Net Ecosystem Exchange In A High-Elevation, Subalpine Forest, Chuixiang Yi, Dean E. Anderson, Andrew A. Turnipseed, Sean P. Burns, Jed P. Sparks, David I. Stannard, Russell K. Monson

Publications and Research

The eddy covariance technique, which is used in the determination of net ecosystem CO₂ exchange (NEE), is subject to significant errors when advection that carries CO₂ in the mean flow is ignored. We measured horizontal and vertical advective CO₂ fluxes at the Niwot Ridge AmeriFlux site (Colorado, USA) using a measurement approach consisting of multiple towers. We observed relatively high rates of both horizontal (F_hadv) and vertical (F_vadv) advective fluxes at low surface friction velocities (u_*) which were associated with downslope katabatic flows. We observed that F_hadv was confined to …

A New Community College Concept Paper Executive Summary, Cuny Guttman Community College

New Community College

No abstract provided.

Keeping Abreast Of Quantum News: Quantum Computing On The Web And In The Literature, Jill Cirasella

Publications and Research

This appendix describes tools that can help you track developments in quantum computing.

Historical Bibliography Of Quantum Computing, Jill Cirasella

Publications and Research

This bibliographic essay reviews seminal papers in quantum computing. Although quantum computing is a young science, its researchers have already published thousands of noteworthy articles, far too many to list here. Therefore, this appendix is not a comprehensive chronicle of the emergence and evolution of the field but rather a guided tour of some of the papers that spurred, formalized, and furthered its study.

Pointcut Rejuvenation: Recovering Pointcut Expressions In Evolving Aspect-Oriented Software, Raffi Khatchadourian, Phil Greenwood, Awais Rashid, Guoqing Harry Xu

Publications and Research

Pointcut fragility is a well-documented problem in Aspect-Oriented Programming; changes to the base-code can lead to join points incorrectly falling in or out of the scope of pointcuts. In this paper, we present an automated approach which limits fragility problems by providing mechanical assistance in pointcut maintenance. The approach is based on harnessing arbitrarily deep structural commonalities between program elements corresponding to join points selected by a pointcut. The extracted patterns are then applied to later versions to offer suggestions of new join points that may require inclusion. To illustrate that the motivation behind our proposal is well-founded, we first …