Digital Operations with Molecules - Advances, Challenges, and Perspectives

2010 ◽  
Vol 63 (2) ◽  
pp. 148 ◽  
Author(s):  
Uwe Pischel
Keyword(s):  
Data Storage ◽  
Combinatorial Chemistry ◽  
Materials Science ◽  
Logic Circuits ◽  
Molecular Devices ◽  
Short Introduction ◽  
Molecular Logic ◽  
Starting Point ◽  
Solid State Devices ◽  
Sequential Logic

This Review gives a short introduction into molecular logic and focusses then on the latest advances in the field. With regard to complex logic circuits and functions, molecular devices for arithmetic processing (adders and subtractors), multiplexers/demultiplexers, and encoders/decoders are discussed. Further on, the concept of memory for data storage and sequential logic is considered together with the latest results on molecular keypad locks. Molecular logic has been often connected to the future aim of molecular computing. However, albeit the herein described approaches constitute a starting point, major challenges like concatenation of gates, solid state devices and compartmentalization, and alternative concepts (reversible logic, multivalued logic) are waiting ahead. These points are included, as well as a view on alternative applications of molecular logic in bio-inspired approaches, combinatorial chemistry, and materials science.

Fault effects in asynchronous sequential logic circuits

1993 ◽  
Vol 140 (6) ◽  
pp. 327-332
Author(s):  
M.-D. Shieh ◽  
C.-L. Wey ◽  
P.D. Fisher
Keyword(s):  
Logic Circuits ◽  
Sequential Logic

scholarly journals Posthumanism and the New Ethics of Medical Practice—Epidemiology as the New Deontological Paradigm

2021 ◽  
Vol 3 (1) ◽  
pp. 106-118
Author(s):  
Timea Vitan ◽  
Keyword(s):  
Medical Practice ◽  
Medical Science ◽  
Medical Specialty ◽  
Medical Doctors ◽  
Public Attention ◽  
Short Introduction ◽  
Starting Point ◽  
History Of ◽  
The Individual ◽  
Vantage Points

In the context of the COVID19 pandemic, during last year all public attention has been focused on Medicine. Epidemiology is no longer just one medical specialty among many others, but became the main paradigm and the unique background of medical science. The individual pacient has turned into the collective pacient. Medical policies are not centered on the pacient anymore, but on its social group. In this article I will try to show how the characteristics of medical practice changed since the pandemic began and which are the deontological implications of such changes. With a short introduction on the medical policies proposed by the WHO during the last decades, I wish to underline the recent history of medical practice and its obvious turning point occasioned by the pandemic. Once the new bioethical vantage points are set, I wonder to which extent posthumanist philosophy foresaw this new deontological paradigm. Having Rosi Braidotti`s “The Posthuman” as my starting point, I maintain that medical doctors no longer practice on a humanist background, but with a sort of commitment that goes beyond the individual. However, this is not an antihumansit pledge, because contemporary medical doctors still adhere to certain humanist principles. As it so often happens, we will be left with even more questions. If the pacient is no longer the individual, but the group of individuals, which is the nature of a symptom and how should we decipher its meaning? How would a new medical science look like if we are to build it not on a human but on a posthuman biology?

Comparing mathematical and heuristic approaches for scientific data analysis

2007 ◽  
Vol 22 (1) ◽  
pp. 53-69 ◽  
Author(s):  
Aparna S. Varde ◽  
Shuhui Ma ◽  
Mohammed Maniruzzaman ◽  
David C. Brown ◽  
Elke A. Rundensteiner ◽  
...  
Keyword(s):  
Mathematical Models ◽  
Data Storage ◽  
Materials Science ◽  
Scientific Data ◽  
Estimation Problem ◽  
Predictive Analysis ◽  
Heuristic Methods ◽  
Science Data ◽  
Domain Specific ◽  
Computational Estimation

AbstractScientific data is often analyzed in the context of domain-specific problems, for example, failure diagnostics, predictive analysis, and computational estimation. These problems can be solved using approaches such as mathematical models or heuristic methods. In this paper we compare a heuristic approach based on mining stored data with a mathematical approach based on applying state-of-the-art formulae to solve an estimation problem. The goal is to estimate results of scientific experiments given their input conditions. We present a comparative study based on sample space, time complexity, and data storage with respect to a real application in materials science. Performance evaluation with real materials science data is also presented, taking into account accuracy and efficiency. We find that both approaches have their pros and cons in computational estimation. Similar arguments can be applied to other scientific problems such as failure diagnostics and predictive analysis. In the estimation problem in this paper, heuristic methods outperform mathematical models.

The exploration of novel fluorescent copper–cysteamine nanosheets for sequential detection of Fe3+ and dopamine and fabrication of molecular logic circuits

2020 ◽  
Vol 8 (37) ◽  
pp. 12935-12942 ◽  
Author(s):  
Zhenzhen Huang ◽  
Wenzhi Song ◽  
Yue Li ◽  
Lingyun Wang ◽  
Nil Kanatha Pandey ◽  
...  
Keyword(s):  
Logic Circuits ◽  
Good Stability ◽  
Sequential Detection ◽  
Red Fluorescence ◽  
Molecular Logic ◽  
Dopamine Detection ◽  
New Type

Herein, newly emerged copper–cysteamine (Cu–Cy) nanosheets with red fluorescence and a good stability were explored as a new type of probe for Fe3+ and dopamine detection.

A brief overview of Materials Science in Uruguay

MRS Advances ◽  
2018 ◽  
Vol 3 (61) ◽  
pp. 3535-3541
Author(s):  
Ivana Aguiar ◽  
Livia Arizaga ◽  
Santiago Botasini ◽  
María Andrea De León ◽  
Sofia Favre ◽  
...  
Keyword(s):  
Materials Science ◽  
Research Area ◽  
Steady State Regime ◽  
Area Of Interest ◽  
Starting Point ◽  
State Regime ◽  
Scopus Database ◽  
Number Of Publications ◽  
Funding Opportunities

ABSTRACTMaterials science is a growing research area in Uruguay. In order to obtain a brief overview of the research done we collected information about research in this field. As a starting point, we searched in the Scopus database for the keywords: affiliation country: “Uruguay” and subject: “Materials Science” (using the “Timbó” platform). We inspected the records and we analyzed them to construct a timeline. The data show that we are in a steady state regime of number of publications that we expect to increase together with the number of students in the area, with the generation of long term policies (grants, funding opportunities), and, if we get involved in a community that promotes this area of interest.

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