SEM/EDS Characterization of Uncommon Metal Whiskers and Determination of Underlying Growth Mechanisms

2018 ◽  
Author(s):  
D. Basak ◽  
L. H. Ponce
Keyword(s):  
Reliability Analysis ◽  
Case Studies ◽  
Whisker Growth ◽  
Innovation Systems ◽  
Growth Mechanisms ◽  
Crystal Oscillator ◽  
Analysis Laboratory ◽  
Investigative Techniques

Abstract Two case-studies on uncommon metals whiskers, performed at the Reliability Analysis Laboratory (RAL) of Northrop Grumman Innovation Systems, are presented. The components analyzed are an Oven Controlled Crystal Oscillator (OCXO) and an Electromechanical Relay. Investigative techniques were used to determine the chemical and physical makeup of the metal whiskers and develop an understanding of the underlying effects and mechanisms that caused the conditions conducive to whisker growth.

scholarly journals Physical, Chemical-Physical Characterization and Determination of Bioactives Compounds of the Pimtobeira Fruits (Talisia esculenta)

2018 ◽  
Vol 11 (1) ◽  
pp. 303
Author(s):  
Artur X. M. de Queiroga ◽  
Franciscleudo B. da Costa ◽  
Mahyara de M. Santiago ◽  
Francimalda F. de Sousa ◽  
Kalinne P. dos Santos ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Bioactive Compounds ◽  
Soluble Solids ◽  
Physical Analysis ◽  
Physical Damage ◽  
Physical Chemical ◽  
Seed Husk ◽  
Analysis Laboratory

Pitombeira fruits have characteristics that provide them with industrial and processed consumption, but they are barely studied, resulting in the need to obtain more information about the species’ potential and its utilization to various purposes. In face of these facts, a physical, chemical-physical and a determination of bioactive compounds post-harvest characterization of pitombeira fruits was done. The fruits were acquired in a street Market in the municipality of Sousa-PB, Brazil, and taken to the Food Analysis Laboratory of the Center of the Federal University of Campina Grande, in the municipality of Pombal-PB, Brazil. Fruits were selected by the absence of physical damage and diseases, as well as by their ripening stage and size, and refrigerated at 4 ºC. Gone 15 repetitions with 25 fruits, 20 fruits were destined to chemical-physical and determination of bioactive compounds analysis and the 5 remaining fruits to the physical analysis. Pitombeira fruits had ideal functional characteristics and necessary to the development and processing of new products, such as high protein content (31.72% in the seed and 39.72% in the skin), phenolic compounds (101.47% in the seed and 106.61% in the skin) and carotenoids (10.14% in the seed and 23.39% in the seed husk). In particular, Pitomba’s pulp can be used for in natura consumption as well as processed, since it has high contents of mineral residue, soluble solids and vitamin C. Pitomba fruits have excellent physical, chemical-physcial and bioactive compounds characteristics, as observed in the high contents of proteins, phenolic compounds, carotenoids and flavonoids in all parts of the fruit. With all these characteristics presented, products such as juices, beverages, bakery products and even food supplements can be made form the pitomba.

scholarly journals Local innovation systems in Poland - the beginning of the road

2017 ◽  
Vol 21 (2) ◽  
pp. 60-67 ◽  
Author(s):  
Wojciech Dziemianowicz ◽  
Agnieszka Laskowska ◽  
Klaudia Peszat
Keyword(s):  
Factor Analysis ◽  
Case Studies ◽  
Innovation Systems ◽  
Systemic Approach ◽  
The Road ◽  
Local Innovation Systems

AbstractLocal innovation systems (LIS) constitute a relatively new term as usually the discussion about the systemic approach to innovation has focused on the level of countries, and most of all - regions. In this article an attempt was made to assess Polish municipalities from the perspective of their potential for development of local innovative systems. The performed factor analysis allowed characterization of five types of institution networks which may impact creation and development of LIS. The study was completed with case studies in selected voivodeship cities as centres of the highest concentration of institutions usually building local innovation systems, three of which were capitals of the poorest regions in Poland.

Characterization of Impressed Current Technique to Model Corrosion of Reinforcement in Concrete

2020 ◽  
Vol 11 (1) ◽  
pp. 93-99
Author(s):  
Abu Zakir Morshed ◽  
Sheikh Shakib ◽  
Tanzim Jahin
Keyword(s):  
Immersion Time ◽  
Chloride Content ◽  
Engineering Science ◽  
Coastal Regions ◽  
Faraday’S Law ◽  
Current Technique ◽  
Corrosion Cell ◽  
Impressed Current

Corrosion of reinforcement is an important durability concern for the structures exposed to coastal regions. Since corrosion of reinforcement involves long periods of time, impressed current technique is usually used to accelerate the corrosion of reinforcement in laboratories. Characterization of impressed current technique was the main focus of this research,which involved determination of optimum chloride content and minimum immersion time of specimens for which the application of Faraday’s law could be efficient. To obtain optimum chloride content, the electrolytes in the corrosion cell were prepared similar to that of concrete pore solutions. Concrete prisms of 200 mm by 200 mm by 300 mm were used to determine the minimum immersion time for saturation. It was found that the optimum chloride content was 35 gm/L and the minimum immersion time for saturation was 140 hours. Accounting the results, a modified expression based on Faraday’s law was proposed to calculate weight loss due to corrosion. Journal of Engineering Science 11(1), 2020, 93-99

The Determination of Sense via Deleuze and Blanchot: Paradoxes of the Habitual, the Immemorial, and the Eternal Return

2008 ◽  
Vol 2 (2) ◽  
pp. 155-177 ◽  
Author(s):  
Eugene Brently Young
Keyword(s):  
Eternal Return

Eternal return is the paradox that accounts for the interplay between difference and repetition, a dynamic at the heart of Deleuze's philosophy, and Blanchot's approach to this paradox, even and especially through what it elides, further illuminates it. Deleuze draws on Blanchot's characterisations of difference, forgetting, and the unlivable to depict the ‘sense’ produced via eternal return, which, for Blanchot, is where repetition implicates or ‘carries’ pure difference. However, for Deleuze, difference and the unlivable are also developed by the living repetition or ‘contraction’ of habit, which results in his distinctive characterization of ‘force’, ‘levity’, and sense in eternal return.

Case Studies in Atomic Force Probe Analysis

2006 ◽  
Author(s):  
Randal Mulder ◽  
Sam Subramanian ◽  
Tony Chrastecky
Keyword(s):  
Failure Analysis ◽  
Case Studies ◽  
Light Emission ◽  
Electrical Characterization ◽  
Logic Circuits ◽  
Contrast Imaging ◽  
Atomic Force ◽  
Measuring Surface ◽  
Analysis Environment

Abstract The use of atomic force probe (AFP) analysis in the analysis of semiconductor devices is expanding from its initial purpose of solely characterizing CMOS transistors at the contact level with a parametric analyzer. Other uses found for the AFP include the full electrical characterization of failing SRAM bit cells, current contrast imaging of SOI transistors, measuring surface roughness, the probing of metallization layers to measure leakages, and use with other tools, such as light emission, to quickly localize and identify defects in logic circuits. This paper presents several case studies in regards to these activities and their results. These case studies demonstrate the versatility of the AFP. The needs and demands of the failure analysis environment have quickly expanded its use. These expanded capabilities make the AFP more valuable for the failure analysis community.

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