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Disponibilidad
Institución detectada Período Navegá Descargá Solicitá
No detectada desde mar. 1997 / hasta dic. 2023 Science Journals

Información

Tipo de recurso:

revistas

ISSN impreso

0036-8075

ISSN electrónico

1095-9203

Editor responsable

American Association for the Advancement of Science (AAAS)

País de edición

Estados Unidos

Fecha de publicación

Cobertura temática

Tabla de contenidos

Why Finance Matters

Jonathan Morduch

<jats:p>A study from the Philippines adds to the case for rethinking the use and impact of microcredit loans.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 1271-1272

Terrestrial Ecosystem Responses to Species Gains and Losses

David A. Wardle; Richard D. Bardgett; Ragan M. Callaway; Wim H. Van der Putten

<jats:p>Ecosystems worldwide are losing some species and gaining others, resulting in an interchange of species that is having profound impacts on how these ecosystems function. However, research on the effects of species gains and losses has developed largely independently of one another. Recent conceptual advances regarding effects of species gain have arisen from studies that have unraveled the mechanistic basis of how invading species with novel traits alter biotic interactions and ecosystem processes. In contrast, studies on traits associated with species loss are fewer, and much remains unknown about how traits that predispose species to extinction affect ecological processes. Species gains and losses are both consequences and drivers of global change; thus, explicit integration of research on how both processes simultaneously affect ecosystem functioning is key to determining the response of the Earth system to current and future human activities.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 1273-1277

Microcredit in Theory and Practice: Using Randomized Credit Scoring for Impact Evaluation

Dean Karlan; Jonathan Zinman

<jats:p>A randomized controlled trial reveals both expected and surprising effects of microcredit.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 1278-1284

Local Macrophage Proliferation, Rather than Recruitment from the Blood, Is a Signature of T H 2 Inflammation

Stephen J. Jenkins; Dominik Ruckerl; Peter C. Cook; Lucy H. Jones; Fred D. Finkelman; Nico van Rooijen; Andrew S. MacDonald; Judith E. Allen

<jats:p>Proliferation in situ, rather than immune cell recruitment, drives macrophage expansion in response to parasitic infection.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 1284-1288

Real-Time Dynamics of Quantized Vortices in a Unitary Fermi Superfluid

Aurel Bulgac; Yuan-Lung Luo; Piotr Magierski; Kenneth J. Roche; Yongle Yu

<jats:p>A generalized theoretical approach is developed to describe the dynamics and phase transitions of Fermi superfluids.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 1288-1291

Transformation Optics Using Graphene

Ashkan Vakil; Nader Engheta

<jats:p>Simulations show that control of the conductivity of a region within a graphene sheet could guide optical waves.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 1291-1294

Wafer-Scale Graphene Integrated Circuit

Yu-Ming Lin; Alberto Valdes-Garcia; Shu-Jen Han; Damon B. Farmer; Inanc Meric; Yanning Sun; Yanqing Wu; Christos Dimitrakopoulos; Alfred Grill; Phaedon Avouris; Keith A. Jenkins

<jats:p>Components such as inductors were fabricated alongside graphene transistors to create integrated radio-frequency mixers.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 1294-1297

Endotoxin-Induced Structural Transformations in Liquid Crystalline Droplets

I-Hsin Lin; Daniel S. Miller; Paul J. Bertics; Christopher J. Murphy; Juan J. de Pablo; Nicholas L. Abbott

<jats:p>Bacterial lipid A was detected by its interactions with defects in droplet-confined liquid crystals.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 1297-1300

Methylhydroxycarbene: Tunneling Control of a Chemical Reaction

Peter R. Schreiner; Hans Peter Reisenauer; David Ley; Dennis Gerbig; Chia-Hua Wu; Wesley D. Allen

<jats:p>Quantum tunneling induces the opposite outcome expected from traditional kinetic factors in a chemical rearrangement.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 1300-1303

Origin and Evolution of Prebiotic Organic Matter As Inferred from the Tagish Lake Meteorite

Christopher D. K. Herd; Alexandra Blinova; Danielle N. Simkus; Yongsong Huang; Rafael Tarozo; Conel M. O’D. Alexander; Frank Gyngard; Larry R. Nittler; George D. Cody; Marilyn L. Fogel; Yoko Kebukawa; A. L. David Kilcoyne; Robert W. Hilts; Greg F. Slater; Daniel P. Glavin; Jason P. Dworkin; Michael P. Callahan; Jamie E. Elsila; Bradley T. De Gregorio; Rhonda M. Stroud

<jats:p>The study of organic matter in a well-preserved meteorite provides insight into processes that affected its parent asteroids.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 1304-1307