aakash valliappan
SQA Analyst at Samsung Electronics
sqa analyst samsung electronics america inc
• diversified experience analysis , quality assurance . • good understanding lte call flow based 3gpp specificatons . • experience robotics automation . • experience aspect test simulator anritsu , spirent tool ( nomad/ mmqa ) attenuator . • experience wireless protocol log capturing diagnosis tool various chipsets qxdm , shannondm , mediatek , wireshark intent log . • profound understanding lte ims architecture . • hands-on experience aspect test management test planning , strategizing test execution . • good interpersonal skill ability work independently team environment .
Samsung Electronics
https://www.linkedin.com/company/samsung-electronics
•	Based on 3GPP specifications, analyzed logs for different test scenarios involving LTE call and VoLTE call.
•	Performed troubleshooting for the VoLTE calls on the Cisco/Affirmed GWs. 
•	Perform Voice Quality, Video Quality, IEC, and roaming testing using Wireshark, QCAT, QXDM, ShannonDM, and ELT Mediatek.
•	Identify, analyze, and Raise/Track PLMs for any defects or issues in the device by closely communicating with R&D and SMEs.
•	Work with ANRISTSU, Successfully performed key performance Indicator testing and collected logs in case on any Issues.
Bellevue, Washington, United States
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SQA Analyst
Sakthi Automotive Group
https://www.linkedin.com/company/sakthi-automotive-group
● Performed KPI and OEE meeting with managers and clients to discuss the issues and weekly update them regarding necessary action performed to achieve target reducing scrap, cold lap, shrinkage, gas holes in parts produced using I-Charts, Pareto Charts and Trend Charts. 
● Developed chemical composition, process flow, quality inspection procedure, test methods update work instructions and validation documents to achieve less rejection rate. Supported manufacturing process by implementing on time rejection rate to the manufacturing team to fix the issues then and there.  
● Studied engineering drawing, customer procurement specification, materials and material specification and further performed feasibility study based on inhouse facility and capacity analysis report to develop program quality plans, inspecting procedures to support program success, provide required test results and sending the prototype samples for approval. 
● Core member of the cross functional team for compiling PPAP package, developing APQP, Control Plans and FMEA.  
● Assist with compliance to ISO/TS 16949 including conducting internal audits, preparing for surveillance audits, Layered Process Audits (LPA) to continuously improve quality, reduce scrap, rework and customer rejections ensuring compliance with day to day requirements of the standard.  
● Conducted Run at Rate (T1-XX steering knuckle for GM) to verify production output to identify bottlenecks and total yield.  
● Addressed customer complaints by initiating action plans. Implemented interim containment actions and permanent preventive actions by applying 8D, fishbone and 5 why techniques.  
● Responsible for high yield and less rejection rate for VW project by collaborating with cross functional team by performing design of experiment, suggesting proper die changeover plan and process parameters and improved the OEE trend from 72% to 81% considering the KPI’s.
Greater Detroit Area
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Quality Engineer
Portland State University
https://www.linkedin.com/company/portland-state-university
• Conducted Design of Experiment for synthesized high emittance quantum dots and conjugating with antibody for tracking and targeting ovarian cancer.
• Set up the laboratory for synthesizing CdSe/ZnS (Core/Shell) quantum dots and maintained all the chemicals and inventory based on MSDS, followed the EHS regulations and maintained 5S.  
• Synthesized CdSe/Zns quantum dot with emittance around 550 nm using organometallic method, made them hydrophilic and conjugated with rat polyclonal IgG (provided by Kiromic Inc.) 
• The hydrodynamic diameter and size distribution of the quantum dots were determined by dynamic light scattering (DLS). Functional group and surface modification of hydrophilic QDs were characterized using Fourier Transform Infrared Spectroscopy (FTIR). The emission and absorption spectra of CdSe/Zns QDs were observed using Photoluminescence Spectroscopy (PL).
Portland, Oregon Area
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Graduate Research Assistant
Portland State University
https://www.linkedin.com/company/portland-state-university
Analysis of Mechanical Components
Analysis and Design of Machine Elements
Biomedical Engineering
Portland, Oregon Area
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Graduate Teaching Assistant
Masters
Specializing in Materials design, synthesis, Characterization and device fabrication
Materials Science Engineering
Portland State University
Master of Science
Physics
Alagappa University
Bachelor of Science
Physics
Bharathidasan University
The needs of the higher thermo-mechanical reliability performance in the Tin-based lead-free solder interconnections are drastically increased in wafer-level chip scale packages implemented in automotive field application. This study reveals that a few wt% Bismuth makes 64% improvement in thermo-mechanical reliability results compared with SAC405 solder. In this study, 12mm X 12mm X 1mm thickness 228LD CTBGA package assembled on 62mil thickness board with NSMD Cu-OSP pad using a SAC305 solder paste. This study is aimed to verify the key mechanism, which enabled the reliability improvements. The crack propagation path shifted with Bismuth contents variation in the lead-free solder interconnections under thermal cycling with -40 to 1250C temperature range and 10OC ramp rate. Microstructure has been studied via polarized optical imaging and High-speed EBSD (electron backscattering diffraction) analysis. The associated grain structure evolution was observed, revealing identifiable signature grain structure development during thermal cycling. Along with the microstructure evolution during thermal cycling, detail resistance monitoring for each localized daisy chain enabled the comparison between various solder materials showing the crack initiation and propagation phenomenon. With this analysis, the decoupling of crack initiation and propagation was performed.
Crack propagation mechanism study on bismuth contained Sn base lead free solder under thermo-mechanical stress
SMTA international conference, Rosemont, Illinois
Chemical Physics
521301
Classical Mechanics
521101
Condensed Matter Physics
521401
Crystal Growth
521510
Device and Circuit Lab
521104
Electromagnetic Theory
521203
Linear and Integrated Electronics
521103
Materials Science
521403
Mathematical Physics
521102
Nuclear Physics
521402
Quantum Mechanics
521201
Finite Element analysis
ME555
Intro: Electronic Packaging
ME578
Materials Failure Analysis
ME576
Microelectronic Device Fabrication
PH545/6/7
Phase Transformation and Kinetics in Materials
ME527
SCanning Electron Microscope and EDX
ME510
Solid Modelling (Solid Works)
ME550
• Conducted Design of Experiment for synthesized high emittance quantum dots and conjugating with antibody for tracking and targeting ovarian cancer. 
• Set up the laboratory for synthesizing CdSe/ZnS (Core/Shell) quantum dots and maintained all the chemicals and inventory based on MSDS, followed the EHS regulations and maintained 5S.  
• Synthesized CdSe/Zns quantum dot with emittance around 550 nm using organometallic method, made them hydrophilic and conjugated with rat polyclonal IgG (provided by Kiromic Inc.) 
• The hydrodynamic diameter and size distribution of the quantum dots were determined by dynamic light scattering (DLS). Functional group and surface modification of hydrophilic QDs were characterized using Fourier Transform Infrared Spectroscopy (FTIR). The emission and absorption spectra of CdSe/Zns QDs were observed using Photoluminescence Spectroscopy (PL).
High emittance CdSe/ZnS (core/shell) quantum dots for tracking and targeting ovarian cancer
• Analyzed thermo-mechanical performance of bismuth in Sn-Ag-Cu interconnection by comparing different wt% bismuth in alloyed Sn-Ag-Cu interconnections. 
• The thermal cycle reliability was evaluated by -40oC to 125oC thermal cycle with 10oC / minute ramping rate and 10-minute dwell time and mechanical shear stress was tested using Dage 4000 plus bond tester. 
• The microstructure was studied via polarized optical imaging and high-speed electron back scattering diffraction analysis.  
• The Weibull plot for the thermal cycling reliability and the microstructure revealed that few wt.% Bismuth in Sn-Ag-Cu solder alloy makes 64% improvement in thermo-mechanical reliability and identified the strengthening mechanism due to bismuth added solder which mitigates recrystallization and grain refinement.
The effect of bismuth in Sn-Ag-Cu interconnection thermo-mechanical performance
Designed and manufactured an Adapter and Casing for Cutting Shaft attached to High Speed Motor using Solidworks and 3D Printer
Adapter and Casing for Cutting Shaft attached to High Speed Motor
As Part of the graduate phase transformation course project I studied and presented the article "Metallurgy of Addictive Manufacturing using examples from Electron Beam Melting"
Metallurgy of Addictive Manufacturing using examples from Electron Beam Melting
Designed different parts of skateboard and assembled using Solidworks
Skate Board 3D design
Compared the difference in structural and compositional effect of polished and fractured titanium sample due to tensile tests ASTM E8-91 (room temperature) and E21-79 (1000oF) using scanning electron microscope and electron dispersive spectroscopy.
Difference in structural and compositional of Ti 6-2-4-2 titanium alloy due to tensile tests.
Studied and analyzed different parts of Printed circuit boards and studied its material properties.
Material Properties of Printed Circuit Boards
Designed a section of stadium roof structure using appropriate wide flange beam and analyzed the stresses, deflection and natural frequencies of vibration using Abaqus software.
A section of Stadium Roof Structure using wide flange beam using FEA software
• The effect of different concentration of Mn in SnO2 nanoparticles were analyzed by synthesizing pure and Mn Doped SnO2 using chemical co-precipitation method and characterizing it using Powdered X-Ray Diffractometer and Fourier Transform Infrared Spectroscopy. 
• It was confirmed that average crystallite size decreased with increase in Mn concentration due to decreasing diffusion rate and the absorption range in FTIR spectra increased with increase in Mn Concentration.
The concentration effect of Mn in tin oxide nanoparticles
Social Services
Red Cross Youth
https://www.linkedin.com/company/red-cross-youth
I was a active member (July 2010 - April 2013) in Red Cross Youth in Bharathidasan University, India. I organized few voluntary awareness program in my city. I was Treasury in-charge in treasury's absence.
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Active Member
Education
Portland State University
https://www.linkedin.com/company/portland-state-university
Mentored an undergraduate student to synthesize quantum dots for bioconjugation
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Mentor
https://www.linkedin.com/in/thomas-glynn-67840820
Lancaster, PA
Thomas Glynn
Metallurgical Engineer, process metallurgy, process engineering, process development, new product introduction, quality assurance and Lean Six Sigma methods.
https://www.linkedin.com/in/yasmeen-khan-6b0364b9
San Francisco Bay Area
Yasmeen Khan
Teacher
https://www.linkedin.com/in/sohin-patel-562054163
Bellevue, WA
SOHIN PATEL
Professional Wireless Engineer | MCPTT | eMBMS | ProSe | 5G,LTE, IMS |
https://www.linkedin.com/in/kaushal-irukulla
Butler, WI
Kaushal Irukulla
Quality Engineer II at Milwaukee Tool
https://in.linkedin.com/in/alagammai-palaniappan-8bab3117b
Tamil Nadu, India
alagammai palaniappan
Junior research fellow
https://www.linkedin.com/in/mustafa-almuzel-74879636
Seattle, WA
Mustafa Almuzel
PhD Candidate in Engineering & Technology Management
https://www.linkedin.com/in/arumugham-palaniappan-a0013294
Richardson, TX
Arumugham Palaniappan
M.D.
https://in.linkedin.com/in/alagammai-palaniappan-4b692a15
Chennai
Alagammai Palaniappan
Lead Business Analyst - Payments at Temenos
https://www.linkedin.com/in/anuradha-veerappan-41768096
Greater Hartford
Anuradha Veerappan
Therapeutic Optometrist in Rocky Hill, CT
https://in.linkedin.com/in/prasad-cdm-06789816a
Chennai
Prasad CDM
Quality Control Engineer at Yamaha Motor Corporation, USA
https://www.linkedin.com/in/steven-v-a69b0258
Houston, TX
Steven V.
Process Control Engineer
https://www.linkedin.com/in/janet-wickeraad-bb8b2956
Greater Sacramento
Janet Wickeraad
Quality Engineer
https://in.linkedin.com/in/venkatadurgarao-pusapati-44093330
Krishna
Venkatadurgarao Pusapati
Senior Quality cum Material Engineer in M/S Lion Engineering Consultants Pvt Ltd
https://www.linkedin.com/in/dharshanika-selvakumar-a30969119
Beaverton, OR
Dharshanika Selvakumar
Project Engineer at Lam Research
https://www.linkedin.com/in/michael-oluwole-684412123
Herndon, VA
Michael Oluwole
Metaverse Technology Hub Founder at MOO  | Data Center Critical Project Manager at AWS
https://www.linkedin.com/in/jordan-henry-665346141
Fairview, OR
Jordan Henry
Ultra Pure and Waste Water Technician at Microchip Technology
https://mx.linkedin.com/in/abelardo-mariscal-51103869
Hermosillo, SON
Abelardo Mariscal
Industrial Engineer
https://www.linkedin.com/in/dr-vipra-jadhav-114711166
Greater Chicago Area
Dr.Vipra Jadhav
Statistical Process Engineer at Wockhardt USA
https://in.linkedin.com/in/pratik-gupta-8a694217
Vadodara
Pratik Gupta
Senior Civil Engineer at GFL, Dahej
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First Lady of Ukraine, screenwriter Olena Zelenska, who stands firmly with her husband. Both have refused asylum invitation by the US."It is said…
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Some useful tricks to avoid losing time on #Excel!
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#neverstoplearning
College Grad Recruiting
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Semiconductor Manufacturing
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Intel Student Lounge
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Metallurgy & Material Science
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TENPDX - The Engineers Network
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