Results 91 to 100 of about 170,343 (261)

Campesinado y pluriactividad en la Navarra Cantábrica en la primera mitad del siglo XIX [PDF]

, 2003
El objetivo de este artículo es analizar las características de la pluriactividad del campesinado en el norte de Navarra durante el siglo XIX. Se estudia el ejemplo concreto de Lesaca, un pueblo en el que la siderurgia tradicional generaba una gran ...
Erdozáin Azpilicueta, Pilar, Mikelarena Peña, Fernando, Paul Arzak, Juan Ignacio   +2 more
core  

Tough, Ductile, and Strong Hard‐Soft Cementitious Composite Enabled by Multi‐Material Additive Manufacturing

Advanced Materials, EarlyView.
Drawing inspiration from the layered hard‐soft architecture found in sea sponges, this work establishes a new framework for architected cementitious composites (ACC) through multi‐material additive manufacturing (MMAM) process. The integration of mortar and elastomer phases into layered architectures enables synergistic toughening mechanisms, including
Aimane Najmeddine, Shashank Gupta, William Makinen, Zayvinn Lin, Krystal Delnoce, Reza Moini   +5 more
wiley   +1 more source

Recent Advances in Electrospun Nanofibers for Triboelectric Nanogenerators: Performance Enhancement Strategies and Emerging Applications

Advanced Materials, EarlyView.
This review highlights recent advances in electrospun nanofiber‐based triboelectric nanogenerators, emphasizing how material design, fiber architecture, and interface engineering collectively enhance output performance and mechanical durability. Key developments in porous, aligned, core‐shell, and hierarchical nanofibers are discussed alongside ...
MD Fajla Rabbi, Jee Hwan Ahn, Duy Linh Vu, Kyoung Kwan Ahn   +3 more
wiley   +1 more source

Effect of differentiated fertilization on the content of soil organic carbon in the conditions of long-term fertilization experiment

Agronomy Science, 2004
On the basis of two long-term fertilization experiments performed on the SGGW experimental field at Łyczyn, the effect of particular fertilizer components (N, P, K, Ca) and manure as well as the application of the increasing doses of mineral fertilizers (
Beata Rutkowska, Wiesław Szulc, Jan Łabętowicz   +2 more
doaj  

Diagnostico financiero en el sector minero – carbonífero: caso empresa Drummond LTD [PDF]

, 2014
El trabajo de grado se realizó con el fin de conocer la situación financiera y la evolución que han tenido las empresas del sector minero-carbonífero del país, tomando como objeto de estudio la segunda productora de carbón más grande de Colombia ...
Maya Villegas, Luz Dary, Ríos Córdoba, Tatiana Marcela, Uparela Ramos, Elizabeth   +2 more
core  

Elephant‐Skin‐Inspired Porous Cementitious Tiles with Programmable Crack Networks for Passive Cooling

Advanced Materials, EarlyView.
Elephant‐skin‐inspired crack networks are programmed in porous diatomaceous earth (DE)‐cement composites using substrate‐guided, stress‐concentration induced fracture. The resulting crack lattices act as capillary conduits that redistribute water, while the porous matrix stores moisture.
Qingya Huang, Kun‐Hao Yu, Ji Yoon Bae, Yunchan Lee, Dorit Aviv, Shu Yang   +5 more
wiley   +1 more source

El tercer ciclo del carbón en Chile, 1973 a 2013: del climaterio al rejuvenecimiento

América Latina en la Historia Económica, 2017
A diferencia de otros latecomers, la historia energética chilena ha estado profundamente vinculada al consumo de carbón mineral. Su importancia en la matriz energética disminuiría desde 1953, abandonando industrias y ferrocarriles para concentrarse en ...
César Yáñez, Martín Garrido-Lepe
doaj   +1 more source

Sostenibilidad de recursos energéticos fosiles y minerales: Uso racional de abastecmiento y cosumo [PDF]

, 2009
Esta primera parte referente a la “Garantía del Suministro Energético” sirve como introducción al informe realizado por este Grupo de Trabajo sobre “Sostenibilidad de los Recursos Energéticos Fósiles y Minerales: Uso Racional en el Abastecimiento y ...
Castillo, Gonzalo del, Gonzalez, Antonio, Martín, Mercedes, Navarrete, Benito, Sanchez Jimenez, José Mª   +4 more
core  

AI–Guided 4D Printing of Carnivorous Plants–Inspired Microneedles for Accelerated Wound Healing

Advanced Materials, EarlyView.
This work presents an artificial intelligence (AI)‐guided 4D‐printed microneedle platform inspired by carnivorous plants for wound healing. A thermo‐responsive shape memory polymer enables body temperature–triggered self‐coiling for autonomous wound closure.
Hyun Lee, Moon‐Jo Kim, DongEung Kim, Chan Ho Moon, Seojoon Bang, Hyeong Seok Kang, Ju Yeong Gwon, Jong Hwa Seo, Junhyub Jeon, Junhyuk Son, Munwon Lim, Minho Kang, Dong Yun Lee, Donghyun Lim, Jung‐Hoon Park, Gi Doo Cha, Soo‐Hong Lee, Tae‐Sik Jang, Kisuk Yang, Yunho Jeong, Youngho Eom, Hyun‐Do Jung   +21 more
wiley   +1 more source

Conductive Hydrogels for Exogenous Sensing and Cell Fate Control

Advanced Materials, EarlyView.
We engineer electrically conductive hydrogels by combining sulfated glycosaminoglycans with semiconducting polymers. These hydrogels bind bioactive proteins, including growth factors, whose release or retention can be modulated by low‐voltage stimulation. The hydrogels are also integrated as 3D channels in organic electrochemical transistors as part of
Teuku Fawzul Akbar, Carlos Alejandro Jimenez‐Rodriguez, Railia Biktimirova, Ilka Hermes, Thomas Kurth, My Duyen Pham, Mikhail Tsurkan, Jens Friedrichs, Francis L. C. Morgan, Hans Kleemann, Olga Guskova, Uwe Freudenberg, Peter Fratzl, Carsten Werner, Christoph Tondera, Ivan R. Minev   +15 more
wiley   +1 more source