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Cover Shows (cover + shows)

Distribution by Scientific Domains
Polymers and Materials Science75%
Humanities and Social Sciences18%

Selected Abstracts

Silicon Microstructures: Detachment Lithography of Photosensitive Polymers: A Route to Fabricating Three-Dimensional Structures (Adv. Funct.

ADVANCED FUNCTIONAL MATERIALS, Issue 2 2010
Mater.
The scanning electron microscope image featured on the front cover shows a three-dimensional polydimethylsiloxane (PDMS) molded film bonded on a glass rod. Multilevel silicon structures used to mold the PDMS film were fabricated from successive steps of detachment lithography of photoresist films, which are patterned with lithography and reactive ion etching, as reported by J. Yeom and M. A. Shannon on page 289. The smallest feature on the pyramid is 2 µm in diameter. [source]

Topography of a composite relict rock glacier, ,l,,a Massif, SW Poland

GEOGRAFISKA ANNALER SERIES A: PHYSICAL GEOGRAPHY, Issue 1 2003
Dorota Borowicz
Abstract A detailed geodetic survey and, additionally, a map of slope covers have been carried out for a composite relict rock glacier on the slopes of Mt ,l,,a (718 m a.s.l.), Sudetic Foreland, SW Poland. The survey allows one to distinguish the mobilisation, transition and accumulation zones and to define geomorphic features diagnostic for relict rock glaciers such as lateral ridges standing above a central depression, steep margins of the landforms in the transition and accumulation zones, as well as absence of distinct head scarps above. Furthermore, it indicates that the present-day hydrographic pattern on the surface of relict rock glaciers has been superimposed on the relief inherited from the active landforms. The topography indicates that tension prevailed rather than compression during the development of the rock glaciers. Some of the features, such as small lateral lobes, developed probably as a result of the compressive flow, however. The pattern of the slope cover shows that it developed during activity of the rock glaciers and been modified afterwards due to solifluction. [source]

Nanowires: A Microfluidic Approach for the Formation of Conductive Nanowires and Hollow Hybrid Structures (Adv. Mater.

ADVANCED MATERIALS, Issue 20 2010
20/2010)
The inside cover shows a scanning electron microscopy image of electrically conductive hybrid nanofibers made of tetrathiafulvalene/gold produced by hydrodynamic flow focusing in a microfluidic device, as reported in work by Josep Puigmartí-Luis and co-workers on p.,2255. The hybrid nanowires produced using this method are potential candidates for nanoscale sensor applications due to their electrical conductivity and their ease of functionalization. [source]

Drug Delivery: Drawing Lithography: Three-Dimensional Fabrication of an Ultrahigh-Aspect-Ratio Microneedle (Adv. Mater.

ADVANCED MATERIALS, Issue 4 2010
4/2010)
Ultrahigh-aspect-ratio microneedles can be fabricated via "drawing lithography", a novel technique in which a thermosetting polymer is directly drawn from a two-dimensional solid surface without the need for a mask and light irradiation. Kwang Lee and co-workers demonstrate this technique on p. 483. The inside cover shows a scanning electron microscopy (SEM) image of three-dimensional structures with ultrahigh aspect ratios, potentially suitable as drug-delivery devices that could replace hypodermic syringes. [source]

Graphene Monolayers: Chemical Vapor Deposition Repair of Graphene Oxide: A Route to Highly-Conductive Graphene Monolayers (Adv. Mater.

ADVANCED MATERIALS, Issue 46 2009
46/2009)
Graphene oxide (GO) is a promising precursor for the mass production of graphene. As an important step in this direction, the electrical conductivity of GO has been enhanced by six orders of magnitude, thus closely approaching that of exfoliated graphene. The novel two-step process reported by Cristina Gómez-Navarro and co-workers on p. 4683 involves hydrogen reduction and healing by a gaseous carbon feedstock. The inside cover shows a snapshot of the crucial second step. The oxidized regions in GO are represented in red, and the blue patches correspond to vacancies. [source]

Expanded Graphite: One-Step Exfoliation Synthesis of Easily Soluble Graphite and Transparent Conducting Graphene Sheets (Adv. Mater.

ADVANCED MATERIALS, Issue 43 2009
43/2009)
The inside cover shows an SEM image of easily soluble expanded graphite (ESEG) on a Si substrate. In work by Ji-Beom Yoo and co-workers (p. 4383) the ESEG was prepared from a fluorinated graphite intercalation compound (FGIC),C2F,·,nClF3. The inset scheme shows the fluorinated graphite intercalation compound. Due to the severe expansion state, the ESEG can be dispersed in organic solvents or even water by ultrasonication with common surfactants. [source]

Photonic Crystals: Patterned Polymeric Domes with 3D and 2D Embedded Colloidal Crystals using Photocurable Emulsion Droplets (Adv. Mater.

ADVANCED MATERIALS, Issue 37 2009
37/2009)
The inside cover shows a scheme for the preparation of photonic dome patterns, SEM images of a dome pattern, and a single dome decorated with 2D colloid array, as fabricated in work reported on p 3771 by Seung-Man Yang and co-workers. The background is an optical microscopy image of patterned photonic domes, which can be used as a near-field microlens array. The greenish color of the domes corresponds to the photonic bandgap. [source]

Organic Electronic Interface Devices: Light- and Touch-Point Localization using Flexible Large Area Organic Photodiodes and Elastomer Waveguides (Adv. Mater.

ADVANCED MATERIALS, Issue 34 2009
34/2009)
The inside cover shows a flexible, large-area, position-sensitive organic photodetector used as an input device for a desktop computer. R. Koeppe et al. show the assembly of such a device with a photodiode based on a blend of Zn-phthalocyanine and C60 with low conductivity electrodes on p. 3510. The current drop across the electrodes easily allows for the calculation of the position of a localized light signal impinging on the position-sensitive photodetector. By adding an additional elastomer layer with embedded LEDs, the device can also be used as flexible touchpad. [source]

Tissue Engineering: Advanced Material Strategies for Tissue Engineering Scaffolds (Adv. Mater.

ADVANCED MATERIALS, Issue 32-33 2009
32-33/2009)
The inside cover shows a scanning electron microscopy image of an accordion-like honeycomb scaffold for myocardial tissue engineering that was explicitly designed to match the structural and mechanical properties of native heart. Further details can be found in the article on p. 3410 by Lisa Freed, George Engelmayr, and co-workers. [source]

Photonic Crystals: Silicon Direct Opals (Adv. Mater.

ADVANCED MATERIALS, Issue 28 2009
28/2009)
The inside cover shows an image of a porous silicon direct opal fabricated by magnesiothermic reduction. Using chemical vapor deposition to infill the porous structure, a nonporous silicon opal can be obtained. The optical properties of opals formed with this method, reported by Cefe López and co-workers on p. 2899, demonstrate the high quality of the final product. [source]

Quantum Dot,Polymer Composites for Displays: Inkjet-Printed Quantum Dot,Polymer Composites for Full-Color AC-Driven Displays (Adv. Mater.

ADVANCED MATERIALS, Issue 21 2009
21/2009)
Vladimir Bulovic and co-workers show on p. 2151 that colloidal quantum dot-polymer composites are used for inkjet print-deposition of high resolution, patterned, multicolored thin films in the fabrication of robust, bright, full-color AC-driven displays. The inside cover shows an inkjet nozzle with a quantum dot solution and a completed device on a flexible substrate under UV illumination, with inset examples of the achievable high resolution and patterning. [source]

Artifical Muscles: Nanocomposite Hydrogel with High Toughness for Bioactuators (Adv. Mater.

ADVANCED MATERIALS, Issue 17 2009
17/2009)
The inside cover shows a nanofibrous hydrogel based on ferritin for a bioinspired nanocomposite actuator, reported in work by Seon Jeong Kim and co-workers on p. 1712. The ferritin-based nanofibrous hydrogels demonstrate synergy between the ferritin protein and a synthetic polymer matrix, as the protein shell of ferritin behaves like an elastic nanospring in the polymer. The actuator is reversibly actuated by chemical energy under external tensile stress, showing improved response speed in comparison to bulk and microfiber hydrogels, coming closer to the goal of mimicking the performance of natural muscle. [source]

Superoleophobic Surfaces: Bioinspired Design of a Superoleophobic and Low Adhesive Water/Solid Interface (Adv. Mater.

ADVANCED MATERIALS, Issue 6 2009
6/2009)
The inside cover shows a bionic strategy to create a low-adhesive and superoleophobic interface via the oil/water/solid three-phase system, which was inspired by the antiwetting behavior of the oil droplets on the fish scales in water, as reported by Lei Jiang and co-workers on p.665. Such antiwetting behavior provides an insight into why many seabirds but few fish are killed when oil tanker spills occur. [source]

Computer simulations of protein translocation

PHYSICA STATUS SOLIDI (B) BASIC SOLID STATE PHYSICS, Issue 9 2006
Serdal Kirmizialtin
Many biological processes involve translocation of protein molecules across pores. Shown in the cover picture of this issue is a snapshot from a computer simulation of the protein ubiquitin that is forced mechanically to enter a narrow cylindrical pore. As the force f applied at one end of the molecule pulls it along the pore, the confinement within the pore causes the protein to unfold. The ensuing changes in the protein's entropy and energy lead to a free energy barrier, which has to be surmounted for the translocation to occur. The magnitude of this barrier is estimated by Kirmizialtin et al. in the article [1]. The plot was generated by using the PyMol software. This paper is a presentation from the 1st Institute for the Theory of Advanced Materials in Information Technology Workshop on Computational Materials and Electronics held 20,22 October 2005 in Austin, USA. The present issue has been guest-edited by James Chelikowsky and Alex Demkov. The background of the cover shows a photograph of the tower of the University of Texas at Austin. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]

Front and Back Covers, Volume 22, Number 4.

ANTHROPOLOGY TODAY, Issue 4 2006
August 200
Front and back cover caption, volume 22 issue 4 Front cover Destruction and fertility meet in this photograph of a swidden ('slash and burn') field cultivated by the Rmeet in highland Laos, illustrating Guido Sprenger's article in this issue. After the secondary forest has been burned from the plots, fresh rice stalks grow between charred stumps during the weeding season in June. A field hut, built each year on the newly cleared plot, can be seen in the background. The author's main informant, one of Takheung's village elders, waits for the author to catch up on the slippery paths. Although denigrated as unsustainable by governments and development agencies worldwide, and hotly debated by agricultural experts and policy-makers, swidden agriculture persists in mountainous areas where wet rice cultivation is difficult. Swiddening involves much more than mere subsistence, and anthropologists have been concerned for many decades with questions of its sustainability, as it forms a central focus for a way of life that integrates all aspects of community life, from economy to cosmology and the reproduction of social relations, including families and marriage ties, ritual and exchange, relations between humans and spirits and also identity. Guido Sprenger seeks to remind those with the power to make decisions over swidden agriculture of the importance of being well informed, as their decisions may radically influence an entire way of life. Back cover Islamic Charities Islamic charities are found all over the world and are mostly uncontroversial. Our back cover shows an appeal, with detachable banker's order form, for the orphan programme of the Beit Al-Khair ('house of charity') Society, a domestic charity in the United Arab Emirates launched in 1989. Almost every Islamic charity operates an orphan programme. Islamic charities have been subjected to close scrutiny, especially by the US Treasury, since 9/11, and are the subject of two books recently published by the university presses of Yale (by Matthew Levitt) and Cambridge (by J. Millard Burr and Robert O. Collins), which belong to the genre of counter-terrorism studies. Such studies emulate the methods of police investigators and financial regulators, making ample use of intelligence websites and newspaper reports and seeking to identify associative networks of culpable individuals and entities. The drawback of these studies is that they do scant justice to the positive aspects of Islamic charities and often attribute guilt by association, since charities blacklisted by the US Treasury have only limited rights of defence and appeal, though very few have been successfully prosecuted. Scrupulous social research, by contrast, tries to understand the words and deeds of charities and charity workers in the widest context. The social research published so far on Islamic charities has focused on their political aspects, including Western-Islamic relations, divisions among Muslims, and connections with opposition movements. In this issue of ANTHROPOLOGY TODAY Jonathan Benthall, who has been studying Islamic charities for 13 years, turns his attention to analysing the special opportunities that international Islamic charities can take advantage of in majority Muslim countries. His article outlines the work of the British-based Islamic Relief in the north of Mali, one of the world's poorest countries, with the implicit suggestion that more in-depth residential ethnographic fieldwork in such settings could yield valuable insights. [source]

Front and Back Covers, Volume 21, Number 5.

ANTHROPOLOGY TODAY, Issue 5 2005
October 200
Front and back cover caption, volume 21 issue 5 Front cover Children in the favela (squatter community) of 'Caxambu', in the northern zone of Rio de Janeiro, Brazil. Although favelas are often depicted as dangerous and as the housing option of last resort, they are also characterized by dense and multi-stranded social ties between residents, long histories of occupation and settlement, and multi-generational families. Caxambu (a pseudonym) was originally settled at the beginning of the 20th century, and residents often describe the neighbourhood as a 'big family'. As the photo makes clear, the alleys, street corners and other public spaces in the favela often serve as giant playgrounds for local children. Back cover THE HUMAN BODY The photo on the back cover shows one of the exhibits from Gunther von Hagens' anatomical exhibition Body Worlds, discussed by Uli Linke in this issue. The exhibits in this show are fashioned from human corpses. The male figure shown here, the body of a man holding and gazing at his own skin, attempts to convey something about the human skin. The anatomical museum markets corpses, artfully transformed to appeal to the viewer. Body Worlds has toured internationally, and attracted millions of visitors. Dead bodies are transformed into sensually appealing 'works of art', playing to fantasies of the alluring body common to the dream worlds promoted by multinational media and entertainment industries. In the exhibition anatomy and pedagogy, economy and medical science, pathology and human rights are closely intertwined. But where do the bodies come from? The corpses, contrary to the exhibitor's claims, are not supplied by German donors - they are procured from Eastern Europe, Russia, Kyrgyzstan and China, from places where human rights and bioethical standards are not enforced. Von Hagens insists that bodies displayed are from donors, and his exhibition website (www.bodyworlds.com) welcomes donations to its body donation programme. In his body factory in Dalian, China, thousands of corpses, including the remains of executed prisoners, are flayed and prepared for later use. This trade in bodies, a multi-million-dollar enterprise, is highly problematic. For the trumpeted 'art of anatomy', with its beautified corpses and eroticized installations, also has a violent dimension, with human victims whose bodies are bought and sold for profit. In November 2002, Gunther von Hagens risked prosecution by holding the first public dissection of a (donated) body in the UK since the 1830s, in London's Atlantis Gallery. The issues surrounding procurement, preparation, dissection and display of human remains are central to anthropology, and in this article Uli Linke discusses in particular the various ways in which this exhbition was interpreted in Germany. [source]