scholarly journals Alexander Lamb Cullen OBE. 30 April 1920—27 December 2013

2018 ◽  
Vol 64 ◽  
pp. 131-148
Author(s):  
J. Brian Davies
Keyword(s):  
Electromagnetic Waves ◽  
Electrical Engineering ◽  
Measurement Techniques ◽  
Science And Engineering ◽  
Engineering Research ◽  
British Science ◽  
Wide Range ◽  
The Media ◽  
Great Sense ◽  
The Times

Alex Cullen combined the sharpest of scientific minds with a gentle personality and a great sense of humour. He was Professor and Head of the Department of Electrical Engineering at Sheffield from 1955 to 1967, and then Head of the Department of Electrical Engineering at University College London (UCL) until 1980. He continued his research there as a Science and Engineering Research Council Senior Fellow until 1985, and for some years as Research Fellow of UCL. His research concerned electromagnetic waves over a wide range of microwave devices and measurement techniques, the latter at a fundamental level. These contributions were of a highly innovative and ‘ground-breaking’ nature. He was appointed OBE in 1960, and elected Fellow of the Royal Society in 1977. He was an accomplished jazz musician, playing drums and clarinet. He was a signatory of a letter to The Times in January 1986, calling on Prime Minister Margaret Thatcher to ‘Save British Science’. This led to the foundation of the Save British Science pressure group, now the Campaign for Science and Engineering (CaSE), which has built up an enviable reputation with politicians and the media in representing the concerns of scientists and engineers. When (now Sir) Eric Ash left UCL in 1985 to become Rector of Imperial College, he remarked that Alex was ‘the last gentleman in the business’.

Microwaves: Application in Electron Microscopy

1990 ◽  
Vol 48 (3) ◽  
pp. 140-141
Author(s):  
Anthony S-Y Leong ◽  
David W Gove
Keyword(s):  
Electron Microscopy ◽  
Light Microscopy ◽  
Chemical Reactions ◽  
Electromagnetic Waves ◽  
Tissue Fixation ◽  
Primary Method ◽  
Dipolar Molecules ◽  
Wide Range ◽  
Time Required ◽  
Cryostat Sections

Microwaves (MW) are electromagnetic waves which are commonly generated at a frequency of 2.45 GHz. When dipolar molecules such as water, the polar side chains of proteins and other molecules with an uneven distribution of electrical charge are exposed to such non-ionizing radiation, they oscillate through 180° at a rate of 2,450 million cycles/s. This rapid kinetic movement results in accelerated chemical reactions and produces instantaneous heat. MWs have recently been applied to a wide range of procedures for light microscopy. MWs generated by domestic ovens have been used as a primary method of tissue fixation, it has been applied to the various stages of tissue processing as well as to a wide variety of staining procedures. This use of MWs has not only resulted in drastic reductions in the time required for tissue fixation, processing and staining, but have also produced better cytologic images in cryostat sections, and more importantly, have resulted in better preservation of cellular antigens.

ENRICHING MEDIA MERCHANDISE SARANA PENUNJANG PROMOSI STUDI KASUS PADA BOOKSTORE

CCIT Journal ◽  
2014 ◽  
Vol 7 (3) ◽  
pp. 420-436
Author(s):  
Dewi Immaniar ◽  
Sudaryono Sudaryono ◽  
Ayu Ningrum
Keyword(s):  
Visual Media ◽  
Test Duration ◽  
Media Campaign ◽  
Business World ◽  
Retail Business ◽  
The Media ◽  
Media Types ◽  
The Times ◽  
A Company

Talk about retail business can not be separated from the importance of service to consumers and good quality goods . But at the present time due to intense competition in the business world , the service and quality of goods is not enough to be able to increase revenue and attract customers loyal . This makes companies think hard to survive and stable in the business . One of them is by using a media campaign in this regard more toward print or visual media is indirectly felt the value of their effectiveness in communicating product marketing programs . PT . Times Prima Indonesia is a company engaged in the retail book with the name of the Times bookstores . Based on the analysis of the company’s problems requires additional media types supporting more varied and creatif promotion of existing ones, which will be used as a complement and a media campaign as well as to enrich the data renewal campaign design to capture the interest of consumers in which one form of the media campaign is shaped merchandise . Therefore , do Enriching ( enrich ) media campaign merchandise before it is less varied and has not formed a company image . The methodology used is the analysis, observation and design . Besides the new design has been tested with the implemented test duration for 6 months, and greatly increases the perceived contribution , this is evidenced by the chart sales increasing each month.

How Scientists Communicate

2020 ◽  
Author(s):  
Alan Kelly
Keyword(s):  
Ethical Issues ◽  
Scientific Communication ◽  
Scientific Publication ◽  
Good Communication ◽  
Wide Range ◽  
Conference Presentations ◽  
Scientific Papers ◽  
History Of ◽  
The Media ◽  
Broad Overview

What is scientific research? It is the process by which we learn about the world. For this research to have an impact, and positively contribute to society, it needs to be communicated to those who need to understand its outcomes and significance for them. Any piece of research is not complete until it has been recorded and passed on to those who need to know about it. So, good communication skills are a key attribute for researchers, and scientists today need to be able to communicate through a wide range of media, from formal scientific papers to presentations and social media, and to a range of audiences, from expert peers to stakeholders to the general public. In this book, the goals and nature of scientific communication are explored, from the history of scientific publication; through the stages of how papers are written, evaluated, and published; to what happens after publication, using examples from landmark historical papers. In addition, ethical issues relating to publication, and the damage caused by cases of fabrication and falsification, are explored. Other forms of scientific communication such as conference presentations are also considered, with a particular focus on presenting and writing for nonspecialist audiences, the media, and other stakeholders. Overall, this book provides a broad overview of the whole range of scientific communication and should be of interest to researchers and also those more broadly interested in the process how what scientists do every day translates into outcomes that contribute to society.

scholarly journals Dynamical visualization of anisotropic electromagnetic re-emissions from a single metal micro-helix at THz frequencies

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
T. Notake ◽  
T. Iyoda ◽  
T. Arikawa ◽  
K. Tanaka ◽  
C. Otani ◽  
...  
Keyword(s):  
Real Time ◽  
Electromagnetic Waves ◽  
Electromagnetic Compatibility ◽  
Smart Antenna ◽  
Dynamical Behavior ◽  
Measurement Techniques ◽  
Spatial Evolution ◽  
Frequency Spectra ◽  
3D Objects ◽  
Current Oscillations

AbstractThe capability for actual measurements—not just simulations—of the dynamical behavior of THz electromagnetic waves, including interactions with prevalent 3D objects, has become increasingly important not only for developments of various THz devices, but also for reliable evaluation of electromagnetic compatibility. We have obtained real-time visualizations of the spatial evolution of THz electromagnetic waves interacting with a single metal micro-helix. After the micro-helix is stimulated by a broadband pico-second pulse of THz electromagnetic waves, two types of anisotropic re-emissions can occur following overall inductive current oscillations in the micro-helix. They propagate in orthogonally crossed directions with different THz frequency spectra. This unique radiative feature can be very useful for the development of a smart antenna with broadband multiplexing/demultiplexing ability and directional adaptivity. In this way, we have demonstrated that our advanced measurement techniques can lead to the development of novel functional THz devices.

scholarly journals Killing a Constitution with a Thousand Cuts: Executive Aggrandizement and Party-state Fusion in India

2020 ◽  
Vol 14 (1) ◽  
pp. 49-95 ◽  
Author(s):  
Tarunabh Khaitan
Keyword(s):  
Good Governance ◽  
Democratic Governance ◽  
The Political ◽  
State Institutions ◽  
Liberal Democratic ◽  
The People ◽  
Wide Range ◽  
General Elections ◽  
The Media ◽  
Democratic Norms

AbstractMany concerned citizens, including judges, bureaucrats, politicians, activists, journalists, and academics, have been claiming that Indian democracy has been imperilled under the premiership of Narendra Modi, which began in 2014. To examine this claim, the Article sets up an analytic framework for accountability mechanisms liberal democratic constitutions put in place to provide a check on the political executive. The assumption is that only if this framework is dismantled in a systemic manner can we claim that democracy itself is in peril. This framework helps distinguish between actions that one may disagree with ideologically but are nonetheless permitted by an elected government, from actions that strike at the heart of liberal democratic constitutionalism. Liberal democratic constitutions typically adopt three ways of making accountability demands on the political executive: vertically, by demanding electoral accountability to the people; horizontally, by subjecting it to accountability demands of other state institutions like the judiciary and fourth branch institutions; and diagonally, by requiring discursive accountability by the media, the academy, and civil society. This framework assures democracy over time – i.e. it guarantees democratic governance not only to the people today, but to all future peoples of India. Each elected government has the mandate to implement its policies over a wide range of matters. However, seeking to entrench the ruling party’s stranglehold on power in ways that are inimical to the continued operation of democracy cannot be one of them. The Article finds that the first Modi government in power between 2014 and 2019 did indeed seek to undermine each of these three strands of executive accountability. Unlike the assault on democratic norms during India Gandhi’s Emergency in the 1970s, there is little evidence of a direct or full-frontal attack during this period. The Bharatiya Janata Party government’s mode of operation was subtle, indirect, and incremental, but also systemic. Hence, the Article characterizes the phenomenon as “killing a constitution by a thousand cuts.” The incremental assaults on democratic governance were typically justified by a combination of a managerial rhetoric of efficiency and good governance (made plausible by the undeniable imperfection of our institutions) and a divisive rhetoric of hyper-nationalism (which brands political opponents of the party as traitors of the state). Since its resounding victory in the 2019 general elections, the Modi government appears to have moved into consolidation mode. No longer constrained by the demands of coalition partners, early signs suggest that it may abandon the incrementalist approach for a more direct assault on democratic constitutionalism.

scholarly journals Towards a methodology for the characterisation of the fabric of wet clays using X-ray scattering

2019 ◽  
Vol 92 ◽  
pp. 01005
Author(s):  
Georgios Birmpilis ◽  
Reza Ahmadi-Naghadeh ◽  
Jelke Dijkstra
Keyword(s):  
Materials Science ◽  
Measurement Techniques ◽  
Invasive Technique ◽  
Colloidal Systems ◽  
Characteristic Distance ◽  
X Ray ◽  
Hydrophobic Coating ◽  
X Ray Scattering ◽  
Wide Range ◽  
Ray Scattering

X-ray scattering is a promising non-invasive technique to study evolving nano- and micromechanics in clays. This study discusses the experimental considerations and a successful method to enable X-ray scattering to study clay samples at two extreme stages of consolidation. It is shown that the proposed sample environment comprising flat capillaries with a hydrophobic coating can be used for a wide range of voids ratios ranging from a clay suspension to consolidated clay samples, that are cut from larger specimens of reconstituted or natural clay. The initial X-ray scattering results using a laboratory instrument indicate that valuable information on, in principal evolving, clay fabric can be measured. Features such as characteristic distance between structural units and particle orientations are obtained for a slurry and a consolidated sample of kaolinite. Combined with other promising measurement techniques from Materials Science the proposed method will help advance the contemporary understanding on the behaviour of dense colloidal systems of clay, as it does not require detrimental sample preparation

scholarly journals Reactivity and Chemical Sintering of Carey Lea Silver Nanoparticles

Nanomaterials ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 1525
Author(s):  
Sergey Vorobyev ◽  
Elena Vishnyakova ◽  
Maxim Likhatski ◽  
Alexander Romanchenko ◽  
Ivan Nemtsev ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Silver Nanoparticles ◽  
Flexible Electronics ◽  
Photoelectron Spectroscopy ◽  
Colloidal Solutions ◽  
Ag Nps ◽  
Wide Range ◽  
Carboxylic Groups ◽  
The Media ◽  
Sulfide Ions

Carey Lea silver hydrosol is a rare example of very concentrated colloidal solutions produced with citrate as only protective ligands, and prospective for a wide range of applications, whose properties have been insufficiently studied up to now. Herein, the reactivity of the immobilized silver nanoparticles toward oxidation, sulfidation, and sintering upon their interaction with hydrogen peroxide, sulfide ions, and chlorocomplexes of Au(III), Pd(II), and Pt(IV) was investigated using SEM and X-ray photoelectron spectroscopy (XPS). The reactions decreased the number of carboxylic groups of the citrate-derived capping and promoted coalescence of 7 nm Ag NPs into about 40 nm ones, excluding the interaction with hydrogen peroxide. The increased nanoparticles form loose submicrometer aggregates in the case of sulfide treatment, raspberry-like micrometer porous particles in the media containing Pd(II) chloride, and densely sintered particles in the reaction with inert H2PtCl6 complexes, probably via the formation of surface Ag-Pt alloys. The exposure of Ag NPs to HAuCl4 solution produced compact Ag films along with nanocrystals of Au metal and minor Ag and AgCl. The results are promising for chemical ambient temperature sintering and rendering silver-based nanomaterials, for example, for flexible electronics, catalysis, and other applications.

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