Electro-Thermal and Semiconductivity Behaviour of Natural Sintered Complex Ca...Al Baha University
The electrical
conductivity (휎), thermal conductivity (퐾) and thermoelectric power coefficient (훼) have been investigated as a function of applied
temperature for the sintered ore materials. The electrical conduction is mainly achieved by free electrons near or in conduction
band or n-type. As the sintering temperature (푇s) increases the conduction of the ore is also increased due to the recombination
process taking place between the electrons and holes. Electrons hopping between Fe2+ and Fe3+ are the main charge carriers.The
formation of Fe3O4 at high sintering temperature acts as an active mineralizer, thus inducing an increased degree of crystallinity
and a more ordered crystal structure is produced.
Electro-Thermal and Semiconductivity Behaviour of Natural Sintered Complex Ca...Al Baha University
The electrical
conductivity (휎), thermal conductivity (퐾) and thermoelectric power coefficient (훼) have been investigated as a function of applied
temperature for the sintered ore materials. The electrical conduction is mainly achieved by free electrons near or in conduction
band or n-type. As the sintering temperature (푇s) increases the conduction of the ore is also increased due to the recombination
process taking place between the electrons and holes. Electrons hopping between Fe2+ and Fe3+ are the main charge carriers.The
formation of Fe3O4 at high sintering temperature acts as an active mineralizer, thus inducing an increased degree of crystallinity
and a more ordered crystal structure is produced.
Artigiani e contadini che in tanti angoli del mondo lavorano per garantire qualità al lavoro e condizioni di vita dignitose a se stessi e alle loro comunità. Saperi e tradizioni che si incontrano per dare un sapore inconfondibile ai cibi delle feste e a piatti che ogni giorno portiamo in tavola. Sono le tante storie quotidiane del Commercio Equo e Solidale che potrete raccontare con le nostre proposte regalo. Naturali, accuratamente selezionati e dal gusto inconfondibile, i prodotti di LiberoMondo porteranno a chi li riceve tutta la vostra attenzione e tante storie del mondo.
Correlation between corrosion inhibitive effect and quantum molecular structu...Al Baha University
Correlation between corrosion inhibitive effect and quantum molecular structure of Schiff bases for iron in acidic and alkaline media
Quantum chemical calculations using the density functional theory (DFT) have been applied to the five kinds of polydentate Schiff base compounds (PSCs), act as inhibitors for iron in aerated 2.0 M HNO3 and 2.0 M NaOH media. The structural parameters, such as the frontier molecular orbital energy HOMO (highest occupied molecular orbital), LUMO (lowest unoccupied molecular orbital), energy gap ΔE (ELUMO - EHOMO), the charge distribution, the absolute electronegativity (χ), the fraction of electrons transfer (ΔN) from inhibitors to iron, the dipole moment (μ), the global hardness (η) and the total energy (Etotal) were also calculated and correlated with their inhibition efficiencies (%IE). The inhibition effects of (PSCs) may be explained in terms of electronic properties. The results showed that the (%IE) of PSCs increased with the increase in EHOMO and decrease in ELUMO - EHOMO. The inhibitor molecules were first adsorbed on the iron surface and blocking the reaction sites available for corrosive attack; and the areas containing N and O atoms are most possible sites for bonding by donating electrons to the iron surface through interaction with π-electrons of the aromatic rings, and the azo methine group. Also, the adsorbed Schiff base molecules interact with iron ions in the corrosive media leading to neutral and cationic iron-Schiff base complexes. Adsorption process is spontaneous, exothermic and obeyed Temkin isotherm and regarded as physical as chemical mechanism. The polarization studied indicated that the inhibitors act as a mixed type inhibitor in HNO3; cause only inhibition of the cathode process in NaOH, and the magnitude of the displacement of the Tafel plot is proportional to its concentration. Models for the inhibition corrosion behaviour were developed based upon statistical analyses of the experimental data. Some thermodynamic and kinetic parameters (Kads, ΔGads) were estimated. Both experimental and quantum theoretical calculations are in excellent agreement. The inhibition efficiency increase in the order of: PSC_1 > PSC_2 > PSC_3 > PSC_4>PSC_5. Thus, DFT study gave further insight into the mechanism of inhibition action of PSCs. This research might provide a theoretical inhibition performance evaluation approach for homologous inhibitors.
Personal details
Name Loutfy H. Madkour
E-mail loutfy_madkour@yahoo.com
Preferred name Madkour, Loutfy H.
Date / time 2016-05-02 14:51:16
Author profiles
Name Author ID Total Correct
Madkour, Loutfy H. 7003686193
170
170
Scott Pechstein – Why buying 3rd party is still the most efficient advertisementSean Bradley
Autobytel has partnered with Polk to track sales results on all Autobytel New and Used Car Quote Requests. Polk matches these leads to State Registration data for all 50 States. Scott will discuss numerous standard reports that include: Close Rate by Source, Close Rate by Make, Crossover between Makes (submitted a lead for a Toyota and bought a Nissan), Crossover between New and Used (submitted a lead for New and bought Used), and Time in Between Lead Submissions and Purchase. Most importantly, what can dealers can do with this information will be discussed. By the end of this discussion, you may redefine who your “competition” really is and refine your Internet Sales process. For a Toyota dealer, you may find you aren’t losing business to the local Toyota store, rather, to the used independent across town.
صلاة الراعي
يا رب تكلم إلينا … أنر بصائرنا
افتح أذهاننا … أعطنا يا رب أنت كلاما من عندك
مرافقا كل كلمة بقوة و سلطان عمل الروح القدس فينا
لتثمر الكلمة فينا ما يجب و ما ينبغي
ما يمجدك و ما يسر قلبك
آمـــين
نحن نريد أن نرى هؤلاء الناس .. نريد أن ندخل داخل قلبها ..
نريد أن ندخل في أعماق الحالة . و بعد ذلك .. المفروض هذا الدخول
يحرك فينا ما يطلق عليه: الحنان .30.57
يا ترى هذا الحنان موجود عندنا أم لا!!
كل واحد يسأل نفسه ..
المسيح دخل إلى عمق الألم في حياة الناس
لذلك تحرك بعاطفة الحنان للعمل
يظن البعض أنهم غير قادرين .. لكن في الواقع نحن به نستطيع كل شيء
نحن في الواقع ينقصنا تحمل المسئولية للعمل و ليس بالكلام.
فالحنان ليس بالأغاني و الترانيم
نحتاج أن نخطو خطوة عملية في الشارع ..
خطوة حنان
هذا هو ما أريد أن أنبر عليه في دراستنا اليوم :
Artigiani e contadini che in tanti angoli del mondo lavorano per garantire qualità al lavoro e condizioni di vita dignitose a se stessi e alle loro comunità. Saperi e tradizioni che si incontrano per dare un sapore inconfondibile ai cibi delle feste e a piatti che ogni giorno portiamo in tavola. Sono le tante storie quotidiane del Commercio Equo e Solidale che potrete raccontare con le nostre proposte regalo. Naturali, accuratamente selezionati e dal gusto inconfondibile, i prodotti di LiberoMondo porteranno a chi li riceve tutta la vostra attenzione e tante storie del mondo.
Correlation between corrosion inhibitive effect and quantum molecular structu...Al Baha University
Correlation between corrosion inhibitive effect and quantum molecular structure of Schiff bases for iron in acidic and alkaline media
Quantum chemical calculations using the density functional theory (DFT) have been applied to the five kinds of polydentate Schiff base compounds (PSCs), act as inhibitors for iron in aerated 2.0 M HNO3 and 2.0 M NaOH media. The structural parameters, such as the frontier molecular orbital energy HOMO (highest occupied molecular orbital), LUMO (lowest unoccupied molecular orbital), energy gap ΔE (ELUMO - EHOMO), the charge distribution, the absolute electronegativity (χ), the fraction of electrons transfer (ΔN) from inhibitors to iron, the dipole moment (μ), the global hardness (η) and the total energy (Etotal) were also calculated and correlated with their inhibition efficiencies (%IE). The inhibition effects of (PSCs) may be explained in terms of electronic properties. The results showed that the (%IE) of PSCs increased with the increase in EHOMO and decrease in ELUMO - EHOMO. The inhibitor molecules were first adsorbed on the iron surface and blocking the reaction sites available for corrosive attack; and the areas containing N and O atoms are most possible sites for bonding by donating electrons to the iron surface through interaction with π-electrons of the aromatic rings, and the azo methine group. Also, the adsorbed Schiff base molecules interact with iron ions in the corrosive media leading to neutral and cationic iron-Schiff base complexes. Adsorption process is spontaneous, exothermic and obeyed Temkin isotherm and regarded as physical as chemical mechanism. The polarization studied indicated that the inhibitors act as a mixed type inhibitor in HNO3; cause only inhibition of the cathode process in NaOH, and the magnitude of the displacement of the Tafel plot is proportional to its concentration. Models for the inhibition corrosion behaviour were developed based upon statistical analyses of the experimental data. Some thermodynamic and kinetic parameters (Kads, ΔGads) were estimated. Both experimental and quantum theoretical calculations are in excellent agreement. The inhibition efficiency increase in the order of: PSC_1 > PSC_2 > PSC_3 > PSC_4>PSC_5. Thus, DFT study gave further insight into the mechanism of inhibition action of PSCs. This research might provide a theoretical inhibition performance evaluation approach for homologous inhibitors.
Personal details
Name Loutfy H. Madkour
E-mail loutfy_madkour@yahoo.com
Preferred name Madkour, Loutfy H.
Date / time 2016-05-02 14:51:16
Author profiles
Name Author ID Total Correct
Madkour, Loutfy H. 7003686193
170
170
Scott Pechstein – Why buying 3rd party is still the most efficient advertisementSean Bradley
Autobytel has partnered with Polk to track sales results on all Autobytel New and Used Car Quote Requests. Polk matches these leads to State Registration data for all 50 States. Scott will discuss numerous standard reports that include: Close Rate by Source, Close Rate by Make, Crossover between Makes (submitted a lead for a Toyota and bought a Nissan), Crossover between New and Used (submitted a lead for New and bought Used), and Time in Between Lead Submissions and Purchase. Most importantly, what can dealers can do with this information will be discussed. By the end of this discussion, you may redefine who your “competition” really is and refine your Internet Sales process. For a Toyota dealer, you may find you aren’t losing business to the local Toyota store, rather, to the used independent across town.
صلاة الراعي
يا رب تكلم إلينا … أنر بصائرنا
افتح أذهاننا … أعطنا يا رب أنت كلاما من عندك
مرافقا كل كلمة بقوة و سلطان عمل الروح القدس فينا
لتثمر الكلمة فينا ما يجب و ما ينبغي
ما يمجدك و ما يسر قلبك
آمـــين
نحن نريد أن نرى هؤلاء الناس .. نريد أن ندخل داخل قلبها ..
نريد أن ندخل في أعماق الحالة . و بعد ذلك .. المفروض هذا الدخول
يحرك فينا ما يطلق عليه: الحنان .30.57
يا ترى هذا الحنان موجود عندنا أم لا!!
كل واحد يسأل نفسه ..
المسيح دخل إلى عمق الألم في حياة الناس
لذلك تحرك بعاطفة الحنان للعمل
يظن البعض أنهم غير قادرين .. لكن في الواقع نحن به نستطيع كل شيء
نحن في الواقع ينقصنا تحمل المسئولية للعمل و ليس بالكلام.
فالحنان ليس بالأغاني و الترانيم
نحتاج أن نخطو خطوة عملية في الشارع ..
خطوة حنان
هذا هو ما أريد أن أنبر عليه في دراستنا اليوم :
セル生産方式におけるロボットの活用には様々な問題があるが,その一つとして 3 体以上の物体の組み立てが挙げられる.一般に,複数物体を同時に組み立てる際は,対象の部品をそれぞれロボットアームまたは治具でそれぞれ独立に保持することで組み立てを遂行すると考えられる.ただし,この方法ではロボットアームや治具を部品数と同じ数だけ必要とし,部品数が多いほどコスト面や設置スペースの関係で無駄が多くなる.この課題に対して音𣷓らは組み立て対象物に働く接触力等の解析により,治具等で固定されていない対象物が組み立て作業中に運動しにくい状態となる条件を求めた.すなわち,環境中の非把持対象物のロバスト性を考慮して,組み立て作業条件を検討している.本研究ではこの方策に基づいて,複数物体の組み立て作業を単腕マニピュレータで実行することを目的とする.このとき,対象物のロバスト性を考慮することで,仮組状態の複数物体を同時に扱う手法を提案する.作業対象としてパイプジョイントの組み立てを挙げ,簡易な道具を用いることで単腕マニピュレータで複数物体を同時に把持できることを示す.さらに,作業成功率の向上のために RGB-D カメラを用いた物体の位置検出に基づくロボット制御及び動作計画を実装する.
This paper discusses assembly operations using a single manipulator and a parallel gripper to simultaneously
grasp multiple objects and hold the group of temporarily assembled objects. Multiple robots and jigs generally operate
assembly tasks by constraining the target objects mechanically or geometrically to prevent them from moving. It is
necessary to analyze the physical interaction between the objects for such constraints to achieve the tasks with a single
gripper. In this paper, we focus on assembling pipe joints as an example and discuss constraining the motion of the
objects. Our demonstration shows that a simple tool can facilitate holding multiple objects with a single gripper.
【DLゼミ】XFeat: Accelerated Features for Lightweight Image Matchingharmonylab
公開URL:https://arxiv.org/pdf/2404.19174
出典:Guilherme Potje, Felipe Cadar, Andre Araujo, Renato Martins, Erickson R. ascimento: XFeat: Accelerated Features for Lightweight Image Matching, Proceedings of the 2024 IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR) (2023)
概要:リソース効率に優れた特徴点マッチングのための軽量なアーキテクチャ「XFeat(Accelerated Features)」を提案します。手法は、局所的な特徴点の検出、抽出、マッチングのための畳み込みニューラルネットワークの基本的な設計を再検討します。特に、リソースが限られたデバイス向けに迅速かつ堅牢なアルゴリズムが必要とされるため、解像度を可能な限り高く保ちながら、ネットワークのチャネル数を制限します。さらに、スパース下でのマッチングを選択できる設計となっており、ナビゲーションやARなどのアプリケーションに適しています。XFeatは、高速かつ同等以上の精度を実現し、一般的なラップトップのCPU上でリアルタイムで動作します。