City College of New York

Women-Empowered Home-Based Agri-Processing: A Sustainable Approach for Rural Economic Development in Afghanistan

Conflict and turmoil over the last 50 years have impaired Afghanistan’s agricultural and water infrastructure and threatened rural livelihoods and economic stability. This study assesses value-added, home-based, women-empowered agri-processing in Afghanistan as a sustainable stra...

Corrosion Behavior of Stainless Steels and Superalloys at 800°C and 900°C in an Oxidizing Environment

ABSTRACT Cement pre‐heaters and calciners suffer extreme degradation in harsh environments. This study presents high‐temperature corrosion behavior of 22 alloys from stainless steels to Ni‐based superalloys, at 800°C and 900°C. Using simulated flue‐gas with KCl and K 2 SO 4 salts...

Student-Selected Videos Together with Scaffolding Questions Improves Learning in a Physics Course

Students increasingly rely on online video for help with class material. Here we ask if this form of self-directed learning can be leveraged to improve learning outcomes of regular classroom instruction. Specifically, we test whether encouraging students to find relevant instruct...

“Rear the Head like a Middle Finger. . . and Pierce the Heavens”: the long poem as a site of blasphemy, obscenity, and friendship in the works of peretz markish and uri tsevi greenberg

I offer a reading of the long poems of two Expressionist Yiddish poets, Peretz Markish and Uri Tsevi Greenberg, according to which the long poem was used as a community-generating practice. Although this aspect of the long poem is recognized by scholars, it is rarely at the cente...

Assessing ozone dynamics during the 2023 summer STAQS field campaign using synergistic observations and model simulations

NASA's Tropospheric Emissions: Monitoring of Pollution (TEMPO) geostationary satellite sensor provides high temporal and spatial resolution measurements critical for monitoring air quality. During the Synergistic TEMPO Air Quality Science (STAQS) component of the 2023 AGES+ campa...

A molecular safeguard in Escherichia coli Braun’s lipoprotein (Lpp) biogenesis

ABSTRACT Braun’s lipoprotein (Lpp) is the most abundant protein present in Escherichia coli . Lpp is an outer membrane (OM) lipoprotein that contributes to the mechanical integrity of the cell envelope by tethering the OM to the underlying peptidoglycan (PGN). It has long been kn...

On locally distinguishing Sierpiński dynamical systems

Abstract We prove that there is no local quasiconformal map between the limit set of a convex‐cocompact Kleinian group and the Julia set of a postcritically finite rational map, provided that both are Sierpiński carpets. This contrasts with the recent results by Y. Luo, D. Ntalam...

Scaling-Based Reciprocal Control Barrier Functions for Nonholonomic Mobile Robots

Abstract This paper studies the construction of control barrier functions (CBFs) for force-controlled nonholonomic mobile robots subject to relative-degree-two safety constraints arising from position-level obstacle avoidance. A scaling-based reciprocal barrier construction is pr...

Expanding frameworks: Integrating vulnerability, exposure, and critical infrastructure to assess pluvial flood risks in New York City

Extreme precipitation events are increasing their frequency and intensity across the United States, posing growing risks to urban communities through pluvial flooding. Effective adaptation against pluvial flooding through structural and nonstructural measures requires understandi...

PARTIAL ACTIONS OF FREE GROUPS AND GROUPOID HOMOLOGY

Abstract We give a length-one projective resolution of the trivial module for the groupoid of a semi-saturated partial action (in the sense of Exel) of a free group on a compact Hausdorff and totally disconnected space. As a consequence, we obtain an elementary computation of the...

Had They Lived in Another Society: Numbers Gambling, Race, and the Reproduction of Vulnerability in Urban Life

This essay traces the debate among Black intellectuals and artists over the role of numbers gambling within Black public life. Over the course of the Twentieth Century an array of Black intellectuals grappled with the dual nature of the numbers game as both a vulnerability prompt...

Structural and biophysical characterization of Mycobacterium tuberculosis DciA reveals functional convergence in DnaB helicase recognition

Abstract In bacteria, DnaB replicative helicases are essential for unwinding genomic DNA to provide the single‐stranded templates required for replication. The recruitment of the hexameric DnaB helicase to the origin of replication is mediated by distinct mechanisms that rely on...

THE ALGORITHM PROCUREMENT PROBLEM IN ARTIFICIAL INTELLIGENCE

Artificial intelligence systems can often solve the same task using substantially different computational methods. Depending on the problem, these may include rule-based and elimination procedures, lookup methods, direct algebraic solutions, pseudoinverse and regularized methods,...

THE ALGORITHM PROCUREMENT PROBLEM IN ARTIFICIAL INTELLIGENCE

Artificial intelligence systems can often solve the same task using substantially different computational methods. Depending on the problem, these may include rule-based and elimination procedures, lookup methods, direct algebraic solutions, pseudoinverse and regularized methods,...

SPARK AND THE DYNAMIC BEHAVIORAL ARCHITECTURE OF AUTONOMOUS ROBOTS

Autonomous robotics has traditionally been concerned with the ability of a machine to perceive its environment, make decisions, and act without continuous human intervention. Classical autonomous systems may react to changing circumstances, select among alternative actions, navig...

SPARK AND THE DYNAMIC BEHAVIORAL ARCHITECTURE OF AUTONOMOUS ROBOTS

Autonomous robotics has traditionally been concerned with the ability of a machine to perceive its environment, make decisions, and act without continuous human intervention. Classical autonomous systems may react to changing circumstances, select among alternative actions, navig...

Testing electron–photon exchange–correlation functional performance for many-electron systems under weak and strong light–matter coupling

We present results for a photon-free exchange–correlation functional within the local density approximation (pxcLDA) for quantum electrodynamics density functional theory (QEDFT), which efficiently describes the electron density of many-electron systems across weak to strong ligh...

Unexpected Suppression of Tomato Fruit Cuticle Formation by Overexpression of a Key Cutin Biosynthetic Enzyme

Fruit cuticles regulate the diffusion of water, gases and solutes, functioning as essential protective interfaces against environmental and biotic stresses. Engineering cuticle structure and mechanics therefore represents a promising strategy for improving fruit quality and resil...

Extreme vulnerability to intruder attacks destabilizes network dynamics

Abstract Consensus, synchronization, formation control, and power grid balance are examples of desirable dynamical states that arise in networks. Here we investigate how such states can be destabilized by an intruder agent within an otherwise functioning network. We see that a si...

Mid-infrared long-range surface polaritons in two-dimensional van der Waals materials

The discovery of graphene plasmons (GPs) and hyperbolic phonon polaritons (HPhPs) in two-dimensional (2D) van der Waals (vdW) materials has enabled extreme light confinement and enhanced light-matter interactions, holding the promise for miniaturized mid-infrared (mid-IR) photoni...