scholarly journals UTBB Thermal Coupling Analysis in Technological Node Level

2020 ◽  
Vol 15 (2) ◽  
pp. 1-5
Author(s):  
Fernando José Costa ◽  
Renan Trevisoli Doria ◽  
Rodrigo Trevisoli Doria
Keyword(s):  
Cross Coupling ◽  
Channel Length ◽  
Node Degree ◽  
Thermal Coupling ◽  
Time Analysis ◽  
Electrical Parameters ◽  
Length Direction ◽  
Drain Region ◽  
Integration Node ◽  
First Time

The main goal of this work is to perform a first-time analysis of the thermal cross-coupling in a system composed by some devices in an integration node degree composed by advanced UTBB SOI MOSFETs through numerical simulations, validated with experimental data from the literature. In this analysis, it could be observed that devices located on the channel length direction provoke a reduced thermal coupling and devices with their drain region next to each other suffer of an increased thermal coupling due to the lumped thermal energy. It also could be observed a degradation in some electrical parameters and in the thermal properties of a device under the influence of surrounded devices biased.

Non-Plasmonic SERS with Silicon: Is It Really Safe? New Insights into Opto-Thermics of Core/Shell Microbeads

2018 ◽  
Author(s):  
Nicolò Bontempi ◽  
Irene Vassalini ◽  
Stefano Danesi ◽  
Matteo Ferroni ◽  
Paolo Colombi ◽  
...  
Keyword(s):  
Critical Role ◽  
Raman Laser ◽  
Core Shell ◽  
Thermal Coupling ◽  
Melting Points ◽  
Experimental Proof ◽  
Weakly Coupled ◽  
Light Management ◽  
Laser Sources ◽  
First Time

<p>Here we investigate for the first time the opto-thermal behavior of SiO<sub>2</sub>/Si core/shell microbeads (Si-rex) irradiated with three common Raman laser sources (lambda=532, 633, 785 nm) under real working conditions. We obtained an experimental proof of the critical role played by bead size and aggregation in heat and light management, demonstrating that in the case of strong opto-thermal coupling the temperature can exceed that of the melting points of both core and shell components. In addition, we also show that weakly coupled beads can be utilized as stable substrates for plasmon-free SERS experiments.</p>

The Total Synthesis of Rhabdastrellic Acid A

2018 ◽  
Author(s):  
Yaroslav Boyko ◽  
Christopher Huck ◽  
David Sarlah
Keyword(s):  
Total Synthesis ◽  
Late Stage ◽  
Cross Coupling ◽  
Side Chains ◽  
General Strategy ◽  
Modular Approach ◽  
Linear Sequence ◽  
Generating Sequence ◽  
First Time

<div>The first total synthesis of rhabdastrellic acid A, a highly cytotoxic isomalabaricane triterpenoid, has been accomplished in a linear sequence of 14 steps from commercial geranylacetone. The prominently strained <i>trans-syn-trans</i>-perhydrobenz[<i>e</i>]indene core characteristic of the isomalabaricanes is efficiently accessed in a selective manner for the first time through a rapid, complexity-generating sequence incorporating a reductive radical polyene cyclization, an unprecedented oxidative Rautenstrauch cycloisomerization, and umpolung 𝛼-substitution of a <i>p</i>-toluenesulfonylhydrazone with in situ reductive transposition. A late-stage cross-coupling in concert with a modular approach to polyunsaturated side chains renders this a general strategy for the synthesis of numerous family members of these synthetically challenging and hitherto inaccessible marine triterpenoids.</div>

Umpolung Coupling of Pyridine-2-carboxaldehydes and Propargylic Carbonates via N-Heterocyclic Carbene/Palladium Synergetic Catalysis

2021 ◽  
Author(s):  
Weiyang Bi ◽  
Yunhui Yang ◽  
Song Ye ◽  
Congyang Wang
Keyword(s):  
Palladium Catalyst ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Cooperative Catalysis ◽  
Cross Coupling Reaction ◽  
First Time

The umpolung cross-coupling reaction of pyridine-2-carboxaldehydes and propargylic carbonates has been developed for the first time through N-heterocyclic carbene/palladium cooperative catalysis with the judicious selections of the palladium catalyst, ligand...

Morphological variation in Xenoxybelis boulengeri (Procter, 1923) (Serpentes, Xenodontinae, Philodryadini)

Zootaxa ◽  
2008 ◽  
Vol 1743 (1) ◽  
pp. 53 ◽  
Author(s):  
ANA LÚCIA DA COSTA PRUDENTE ◽  
MÁRCIO ANDRÉ AMORIM DA SILVA ◽  
WÁLDIMA ALVES DA ROCHA ◽  
FRANCISCO LUÍS FRANCO
Keyword(s):  
Morphological Variation ◽  
Rare Species ◽  
Original Description ◽  
External Morphology ◽  
Time Analysis ◽  
Morphometric Characters ◽  
Permit Allocation ◽  
Scientific Collections ◽  
First Time ◽  
Molecular Characters

The genus Xenoxybelis contains two species, X. argenteus and X. boulengeri, characterized by semi-arboreal habits and an extremely thin rostral area, classified in the subfamily Xenodontinae (Colubridae). Xenoxybelis boulengeri is considered a rare species and is poorly represented in scientific collections. Its external morphology is known only from the original description and seven other specimens. In this study, twenty additional specimens were examined from the Brazilian states of Acre, Amazonas and Rondônia. Variation in meristic and morphometric characters are described, and new characters are incorporated in a revised diagnosis of the species. Illustrations and a description of the hemipenes of X. boulengeri are presented for the first time. Analysis of morphological and molecular characters permit allocation of Xenoxybelis to the tribe Phylodryadini, together with Ditaxodon, Philodryas, Pseudablabes and Tropidodryas.

scholarly journals Low-Offset In-Plane Sensitive Hall Arrangement

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 713
Author(s):  
Siya Lozanova ◽  
Ivan Kolev ◽  
Avgust Ivanov ◽  
Chavdar Roumenin
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Output Voltage ◽  
Cross Coupling ◽  
The Novel ◽  
Temperature Drift ◽  
Low Offset ◽  
First Time ◽  
Single Configuration ◽  
Hall Elements

A novel in-plane sensitive Hall arrangement consisting of two identical n-Si three-contact (3C) elements and realized in a common technological process, is presented. In the solution, the minimization of the offset and its temperature drift is achieved by cross-coupling of the outer device contacts. This terminals’ connection provides equalizing currents between the two substrates which strongly compensate the inevitable difference in the electrical conditions in the two parts of the arrangement. As a result, the residual offset of both integrated Hall elements at the output Vout(0) and its temperature drift are strongly minimized. The residual offset is about 160 times smaller than the single-configuration one. The obtained output voltage-to-residual offset ratio at sensitivity of SRI ≈ 98 V/AT is very promising, reaching 6 × 103 at temperature T = 40 °C and induction 1 T. As a result, increased metrological accuracy for numerous applications is achieved. For a first time through the novel arrangement a suppression of sensitivity in the presence of external magnetic field could be achieved in order to obtain permanent offset information. This is one of the key results in the Hall device investigation.

Electrochemical Synthesis of 2-Hydroxy-para-terphenyls by Dehydrogenative Anodic C–C Cross-Coupling Reaction

Synlett ◽  
2019 ◽  
Vol 30 (10) ◽  
pp. 1174-1177 ◽  
Author(s):  
Sebastian Lips ◽  
Robert Franke ◽  
Siegfried R. Waldvogel
Keyword(s):  
Functional Groups ◽  
Electrochemical Synthesis ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Cross Coupling Reaction ◽  
Wide Range ◽  
Broad Variety ◽  
First Time ◽  
Fast Access

The anodic C–C cross-coupling reaction provides fast access to a wide range of bi- and terarylic scaffolds by electrochemically mediated arylation reactions. Herein, a metal- and reagent-free electrosynthetic protocol for the synthesis of nonsymmetrical 2-hydroxy-para-teraryl derivatives is presented for the first time. It is scalable, easy to conduct, and allows the use of a broad variety of different functional groups.

Graphical Analysis of Improvements in Manufacturing Processes as Result of Kaizen Events

2012 ◽  
Vol 502 ◽  
pp. 63-68 ◽  
Author(s):  
B.T. Rieger ◽  
M.A. Sebastián
Keyword(s):  
Lean Manufacturing ◽  
Graphical Method ◽  
Graphical Analysis ◽  
Manufacturing Processes ◽  
Time Analysis ◽  
Analysis And Evaluation ◽  
Value Stream ◽  
Kaizen Events ◽  
First Time ◽  
Value Stream Map

Productivity is an important factor in any industrial production. Based on several concepts and philosophies such as Kaizen and others, it is possible to realize an increase of productivity. Since it is of great interest to know and to evaluate the improvement, a suitable method that allows not only analyzing the improvement of cost but also of time is of interest. Based on the value stream map (VSM) and the profile of cost and time (PCT) the author has developed the PECOTA method, a graphical method of analysis. The concept of investment in time and cost by PECOTA allows first-time analysis and evaluation of a change in a manufacturing process in an easy and fast way. The method includes also the possibility to define the limit of lean manufacturing with the current processes.

Efficient solvent- and temperature-tuned access to aldoxime ethers and phenolic functions by Pd-catalyzed C–O cross-coupling of aldoximes with aryl bromides and bromo-chalcones

2020 ◽  
Vol 44 (4) ◽  
pp. 1326-1336 ◽  
Author(s):  
Reeta Reeta ◽  
T. M. Rangarajan ◽  
Kumar Kaushik ◽  
Rishi Pal Singh ◽  
Manjula Singh ◽  
...  
Keyword(s):  
Cross Coupling ◽  
Aryl Bromides ◽  
Single Method ◽  
First Time

A single method with a functionality switching option, to access oxime ethers and phenols, was developed for the first time for the Pd-catalyzed C–O cross-coupling of aryl bromides and bromo-chalcones with aldoximes.

Towards the Total Synthesis of Schisandrene: Stereoselective Synthesis of the Dibenzocyclooctadiene Lignan Core

Synlett ◽  
2018 ◽  
Vol 29 (07) ◽  
pp. 908-911 ◽  
Author(s):  
K. Babu ◽  
Arramshetti Venkanna ◽  
Borra Poornima ◽  
Bandi Siva ◽  
B. Babu
Keyword(s):  
Total Synthesis ◽  
Stereoselective Synthesis ◽  
Asymmetric Reduction ◽  
Cross Coupling ◽  
Membered Ring ◽  
Stille Reaction ◽  
Reaction Sequence ◽  
Ring Closing Metathesis ◽  
Synthetic Strategy ◽  
First Time

A stereoselective synthesis of the dibenzocyclooctadiene ­lignan core of the natural product schisandrene is described. Starting from readily available gallic acid, the synthetic strategy involves Suzuki–Miyaura cross-coupling, Stille reaction, and ring-closing metathesis (RCM) in the reaction sequence. The required asymmetric center at C-7′ was established by an asymmetric reduction of a keto compound using the Corey–Bakshi–Shibata (CBS) catalyst. In our approach, the eight-membered ring was achieved by RCM for the first time.

Thermal Performance in Multi-Pass Solar Systems With Well-Mixed Storage

1987 ◽  
Vol 109 (2) ◽  
pp. 94-100
Author(s):  
J. M. Gordon ◽  
Y. Zarmi
Keyword(s):  
System Performance ◽  
Closed Loop ◽  
Open Loop ◽  
Thermal Coupling ◽  
Storage Tanks ◽  
Actual System ◽  
Solar Systems ◽  
Penalty Factor ◽  
First Time ◽  
Partial Depletion

An approximate analysis of multi-pass, closed-loop solar systems with well-mixed storage tanks is presented. The thermal coupling of the storage tank both to the collector-storage loop (“charging” cycle) and the load-storage loop (“discharging” cycle) is shown to reduce system performance by a penalty factor, called the partial depletion factor, when compared to one-pass, open-loop systems in which the storage fluid is completely consumed by the load by the end of each 24-hour day (total depletion). This penalty factor is typically around 20 percent for systems with a daytime-only load and 30 percent for systems with a nighttime-only load. Our analysis provides, for the first time, the explanation for the findings of various experiments and numerical simulations. We establish the approximate validity of a “quasi-steady state” approach, wherein actual system performance is approximated by a calculation based on the repetition of one representative day. The approach is general in that it is applicable to all solar collector types.

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