Patents by Inventor Ranjan Sen
Ranjan Sen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230259446Abstract: According to some embodiments, systems and methods are provided, comprising an Application Programming Interface (API) source; a cluster including a master node and at least one worker node; a memory storing processor-executable program code; and a processing unit to execute the processor-executable program code to cause the system to: receive, at the cluster, an API from the API source; receive, at the cluster, a customer usage value for the received API; determine a load test injection pattern for the received API based on the customer usage value; schedule execution of a load test for the received API based on the determined load test injection pattern; and execute the load test on the at least one worker node. Numerous other aspects are provided.Type: ApplicationFiled: February 16, 2022Publication date: August 17, 2023Inventors: Shuva Ranjan Sen SHARMA, Mohammad Jibran Jibran SOFI, Mayank LAKHERA, Deven PATIDAR
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Patent number: 11561886Abstract: A testing scenario (forming part of a computing environment executing a plurality of applications) is initiated to characterize performance of the applications. During the execution of the testing scenario, various performance metrics associated with the applications are monitored. Thereafter, data characterizing the performance metrics is provided (e.g., displayed, loaded into memory, stored on disk, transmitted to a remote computing system, etc.). The testing scenario is generated by monitoring service calls being executed by each of a plurality of automates across the applications, generating a service request tree based on the monitored service calls for all of the applications, and removing cyclic dependencies in the service request tree such that reusable testing components are only used once. Related apparatus, systems, techniques and articles are also described.Type: GrantFiled: September 19, 2019Date of Patent: January 24, 2023Assignee: SAP SEInventors: Dinesh Bhandarkar, Arpitha Shirdish, Sandeep Joy, Shuva Ranjan Sen Sharma
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Publication number: 20210089435Abstract: A testing scenario (forming part of a computing environment executing a plurality of applications) is initiated to characterize performance of the applications. During the execution of the testing scenario, various performance metrics associated with the applications are monitored. Thereafter, data characterizing the performance metrics is provided (e.g., displayed, loaded into memory, stored on disk, transmitted to a remote computing system, etc.). The testing scenario is generated by monitoring service calls being executed by each of a plurality of automates across the applications, generating a service request tree based on the monitored service calls for all of the applications, and removing cyclic dependencies in the service request tree such that reusable testing components are only used once. Related apparatus, systems, techniques and articles are also described.Type: ApplicationFiled: September 19, 2019Publication date: March 25, 2021Inventors: Dinesh Bhandarkar, Arpitha Shirdish, Sandeep Joy, Shuva Ranjan Sen Sharma
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Patent number: 10040714Abstract: The present invention provides a process for fabrication of ytterbium (Yb) doped optical fiber through vapor phase doping technique. The method comprises deposition of Al2O3 and Yb2O3 in vapor phase simultaneously in combination with silica during formation of sintered core layer. This is followed by collapsing at a high temperature in stepwise manner to produce the preform and drawing of fibers of appropriate dimension. The process parameters have been optimized in such a way that Al and Yb-chelate compounds can be transported to the reaction zone without decomposition and condensation of precursor materials. Thus variations of dopants concentration along the length of the preform have been minimized to <1% and good repeatability of the process has also been achieved. The resulting fibers also have smooth core-clad boundary devoid of any star-like defect. The process can be reliably adopted for fabrication of large core Yb doped optical fibers.Type: GrantFiled: March 26, 2014Date of Patent: August 7, 2018Assignees: Council of Scientific & Industrial Research, Department of Electronics and Information TechnologyInventors: Ranjan Sen, Maitreyee Saha
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Publication number: 20160083284Abstract: The present invention provides a process for fabrication of ytterbium (Yb) doped optical fiber through vapor phase doping technique. The method comprises deposition of Al2O3 and Yb2O3 in vapor phase simultaneously in combination with silica during formation of sintered core layer. This is followed by collapsing at a high temperature in stepwise manner to produce the preform and drawing of fibers of appropriate dimension. The process parameters have been optimized in such a way that Al and Yb-chelate compounds can be transported to the reaction zone without decomposition and condensation of precursor materials. Thus variations of dopants concentration along the length of the preform have been minimized to <1% and good repeatability of the process has also been achieved. The resulting fibers also have smooth core-clad boundary devoid of any star-like defect. The process can be reliably adopted for fabrication of large core Yb doped optical fibers.Type: ApplicationFiled: March 26, 2014Publication date: March 24, 2016Inventors: Ranjan Sen, Maitreyee Saha
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Patent number: 8649650Abstract: The present invention provides a method of making rare earth (RE) doped optical fiber using BaO as co-dopant instead of Al or P commonly used for incorporation of the RE in silica glass by MCVD and solution doping technique. The method comprises deposition of particulate layer of GeO2 doped SiO2 with or without small P2O5 for formation of the core and solution doping by soaking the porous soot layer into an aqueous solution of RE and Ba containing salt. This is followed by dehydration and sintering of the soaked deposit, collapsing at a high temperature to produce the preform and drawing of fibers of appropriate dimension. The use of Ba-oxide enables to eliminate unwanted core-clad interface defect which is common in case of Al doped fibers. The fibers also show good RE uniformity, relatively low optical loss in the 0.6-1.6 ?m wavelength region and good optical properties suitable for their application in amplifiers, fiber lasers and sensor devices.Type: GrantFiled: March 29, 2010Date of Patent: February 11, 2014Assignees: Council of Scientific & Industrial Research, Department of Information TechnologyInventors: Ranjan Sen, Anirban Dhar, Mukul Chandra Paul, Himadri Sekhar Maiti
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Publication number: 20120201504Abstract: The present invention provides a method of making rare earth (RE) doped optical fiber using BaO as co-dopant instead of Al or P commonly used for incorporation of the RE in silica glass by MCVD and solution doping technique. The method comprises deposition of particulate layer of GeO2 doped SiO2 with or without small P2O5 for formation of the core and solution doping by soaking the porous soot layer into an aqueous solution of RE and Ba containing salt. This is followed by dehydration and sintering of the soaked deposit, collapsing at a high temperature to produce the preform and drawing of fibers of appropriate dimension. The use of Ba-oxide enables to eliminate unwanted core-clad interface defect which is common in case of Al doped fibers. The fibers also show good RE uniformity, relatively low optical loss in the 0.6-1.6 ?m wavelength region and good optical properties suitable for their application in amplifiers, fiber lasers and sensor devices.Type: ApplicationFiled: March 29, 2010Publication date: August 9, 2012Inventors: Ranjan Sen, Anirban Dhar, Mukul Chandra Paul, Himadri Sekhar Maiti
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Publication number: 20060063709Abstract: Constitutive and tissue-specific protein factors which bind to transcriptional regulatory elements of Ig genes (promoter and enhancer) are described. The factors were identified and isolated by an improved assay for protein-DNA binding. Genes encoding factors which positively regulate transcription can be isolated and employed to enhance transcription of Ig genes. In particular, NF-kB, the gene encoding NF-kB, IkB and the gene encoding IkB and uses therefor.Type: ApplicationFiled: January 4, 2002Publication date: March 23, 2006Inventors: David Baltimore, Ranjan Sen, Phillip Sharp, Harinder Singh, Louis Staudt, Jonathan LeBowitz, Albert Baldwin, Roger Clerc, Lynn Corcoran, Patrick Baeuerle, Michael Lenardo, Chen-Ming Fan, Thomas Maniatis
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Patent number: 6889528Abstract: The present invention discloses a process for making rare earth (RE) doped optical fiber by using RE oxide coated silica nanoparticles as the precursor material, more particularly the method of the present invention involves preparation of stable dispersions (sol) of RE oxide coated silica nanoparticles at ambient temperature and applying a thin coating on the inner surface of silica glass tube following dip coating technique or any other conventional methods, of the said silica sol containing suitable dopants selected from Ge, Al, P, etc.Type: GrantFiled: October 22, 2001Date of Patent: May 10, 2005Assignees: Council of Scientific & Industrial Research, Bar-Ilan UniversityInventors: Ranjan Sen, Minati Chatterjee, Milan Kanti Naskar, Mrinmay Pal, Mukul Chandra Paul, Shyamal Kumar Bhadra, Kamal Dasgupta, Dibyendu Ganguli, Tarun Bandyopadhyay, Aharon Gedanken
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Patent number: 6851281Abstract: The present invention provides a method of fabricating rare earth doped preforms and optical fibers by a combination of modified chemical vapor deposition (MCVD) process and solution doping technique said MCVD process is used to develop matched or depressed clad structure inside a silica glass substrate tube followed by deposition of porous silica soot layer containing GeO2, P2O5 or such refractive index modifiers by the backward deposition method for formation of the core and presintering the deposited particulate layer by backward pass with flow of GeCl4 and/or corresponding dopant halides, soaking the porous soot layer into an alcoholic/aqueous solution of RE-salts containing codopants such as AlCl3 in definite proportion, drying, oxidation, dehydration and sintering of the RE containing porous deposit and by collapsing at a high temperature to produce the preform followed by drawing the fibers by known technique to produce fibers with suitable core-clad dimensions and geometry.Type: GrantFiled: March 27, 2002Date of Patent: February 8, 2005Assignee: Council of Scientific and Industrial ResearchInventors: Ranjan Sen, Mrinmay Pal, Mukul Chandra Paul, Shyamal Kumar Bhadra, Somesh Chatterjee, Kamal Dasgupta
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Publication number: 20040214757Abstract: Constitutive and tissue-specific protein factors which bind to transcriptional regulatory elements of Ig genes (promoter and enhancer) are described. The factors were identified and isolated by an improved assay for protein-DNA binding. Genes encoding factors which positively regulate transcription can be isolated and employed to enhance transcription of Ig genes. In particular, NF-kB, the gene encoding NF-kB, IkB and the gene encoding IkB and uses therefor.Type: ApplicationFiled: January 4, 2002Publication date: October 28, 2004Inventors: David Baltimore, Ranjan Sen, Phillip A. Sharp, Harinder Singh, Louis Staudt, Jonathan H. LeBowitz, Albert S. Baldwin, Roger G. Clerc, Lynn M. Corcoran, Patrick A. Baeuerle, Michael J. Lenardo, Chen-Ming Fan, Thomas P. Maniatis
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Publication number: 20040187524Abstract: The present invention discloses a process for making rare earth (RE) doped optical fibre by using RE oxide coated silica nanoparticles as the precursor materia, more particularly the method of the present invention involves preparation of stable dispersions (sol) of RE oxide coated silica nanoparticles at ambient temperature and applying a thin coating on the inner surface of silica glass tube following dip coating technique or any other conventional methods, of the said silica sol containing suitable dopants selected from Ge, Al, P, etc.Type: ApplicationFiled: October 22, 2001Publication date: September 30, 2004Applicant: COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCHInventors: Ranjan Sen, Minati Chatterjee, Milan Kanti Naskar, Mrinmay Pal, Mukul Chandra Paul, Shyamal Kumar Bhadra, Kamal Dasgupta, Dibyendu Ganguli, Tarun Bandyopadhyay, Aharon Gedanken
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Patent number: 6751990Abstract: The present invention provides an improved process for making rare earth doped preforms and fibers by a combination of MCVD technique and solution doping method, said method comprising developing matched or depressed clad structure inside a silica glass substrate tube followed by deposition of unsintered particulate layer containing GeO2 and P2O5 for formation of the core and solution doping by soaking the porous soot layer into an alcoholic/aqueous solution of RE-salts containing co-dopants like AlCl3/Al(NO3)3 in definite proportion, controlling the porosity of the soot, dipping period, strength of the solution and the proportion of the codopants to achieve the desired RE ion concentration in the core and minimize the core clad boundary defects and followed by drying, oxidation, dehydration and sintering of the RE containing porous deposit and collapsing at a high temperature to produce the preform and overcladding with silica tubes of suitable dimensions and fiber drawing to produce fibers.Type: GrantFiled: March 6, 2001Date of Patent: June 22, 2004Assignee: Council of Scientific and Industrial ResearchInventors: Tarun Bandyopadhyay, Ranjan Sen, Shyamal Kumar Bhadra, Kamal Dasgupta, Mukul Chandra Paul
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Publication number: 20030182970Abstract: The present invention provides a method of fabricating rare earth doped preforms and optical fibres by a combination of modified chemical vapour deposition (MCVD) process and solution doping technique said MCVD process is used to develop matched or depressed clad structure inside a silica glass substrate tube followed by deposition of porous silica soot layer containing GeO2, P2O5 or such refractive index modifiers by the backward deposition method for formation of the core and presintering the deposited particulate layer by backward pass with flow of GeCl4 and/or corresponding dopant halides, soaking the porous soot layer into an alcoholic/aqueous solution of RE-salts containing codopants such as AlCl3 in definite proportion, drying, oxidation, dehydration and sintering of the RE containing porous deposit and by collapsing at a high temperature to produce the preform followed by drawing the fibres by known technique to produce fibres with suitable core-clad dimensions and geometry.Type: ApplicationFiled: March 27, 2002Publication date: October 2, 2003Applicant: COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCHInventors: Ranjan Sen, Mrinmay Pal, Mukul Chandra Paul, Shyamal Kumar Bhadra, Somesh Chatterjee, Kamal Dasgupta
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Publication number: 20020124601Abstract: The present invention provides an improved process for making rare earth doped preforms and fibers by a combination of MCVD technique and solution doping method, said method comprising developing matched or depressed clad structure inside a silica glass substrate tube followed by deposition of unsintered particulate layer containing GeO2 and P2O5 for formation of the core and solution doping by soaking the porous soot layer into an alcoholic/aqueous solution of RE-salts containing co-dopants like AlCl3/Al(NO3)3 in definite proportion, controlling the porosity of the soot, dipping period, strength of the solution and the proportion of the codopants to achieve the desired RE ion concentration in the core and minimize the core clad boundary defects and followed by drying, oxidation, dehydration and sintering of the RE containing porous deposit and collapsing at a high temperature to produce the preform and overdladding with silica tubes of suitable dimensions and fiber drawing to produce fibers.Type: ApplicationFiled: March 6, 2001Publication date: September 12, 2002Inventors: Tarun Bandyopadhyay, Ranjan Sen, Shyamal Kumar Bhadra, Kamal Dasgupta, Mukul Chandra Paul
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Patent number: 6410516Abstract: Constitutive and tissue-specific protein factors which bind to transcriptional regulatory elements of Ig genes (promoter and enhancer) are described. The factors were identified and isolated by an improved assay for protein-DNA binding. Genes encoding factors which positively regulate transcription can be isolated and employed to enhance transription of Ig genes. In particular, NF-kB, the gene encoding NF-kB, IkB and the gene encoding IkB and uses therefor.Type: GrantFiled: June 5, 1995Date of Patent: June 25, 2002Assignees: President & Fellows of Harvard College, Massachusetts Institute of Technology, Whitehead Instittue for Biomedical ResearchInventors: David Baltimore, Ranjan Sen, Phillip A. Sharp, Harinder Singh, Louis Staudt, Jonathan H. Lebowitz, Albert S. Baldwin, Jr., Roger G. Clerc, Lynn M. Corcoran, Patrick A. Baeuerle, Michael J. Lenardo, Chen-Ming Fan, Thomas P. Maniatis
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Patent number: 6150090Abstract: Constitutive and tissue-specific protein factors which bind to transcriptional regulatory elements of Ig genes (promoter and enhancer) are described. The factors were identified and isolated by an improved assay for protein-DNA binding. Genes encoding factors which positively regulate transcription can be isolated and employed to enhance transription of Ig genes. In particular, NF-kB, the gene encoding NF-kB, IkB and the gene encoding IkB and uses therefor.Type: GrantFiled: June 5, 1995Date of Patent: November 21, 2000Assignees: Massachusetts Institute of Technology, Whitehead Institute, President and Fellows of Harvard CollegeInventors: David Baltimore, Ranjan Sen, Phillip A. Sharp, Harinder Singh, Louis Staudt, Jonathan H. LeBowitz, Albert S. Baldwin, Jr., Roger G. Clerc, Lynn M. Corcoran, Patrick A. Baeuerle, Michael J. Lenardo, Chen-Ming Fan, Thomas P. Maniatis
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Patent number: 5804374Abstract: Constitutive and tissue-specific protein factors which bind to transcriptional regulatory elements of Ig genes (promoter and enhancer) are described. The factors were identified and isolated by an improved assay for protein-DNA binding. Genes encoding factors which positively regulate transcription can be isolated and employed to enhance transription of Ig genes. In particular, NF-kB, the gene encoding NF-kB, IkB and the gene encoding IkB and uses therefor.Type: GrantFiled: April 6, 1995Date of Patent: September 8, 1998Assignees: Massachusetts Insti. Technology, Whitehead Insti., Pres. and Fellow of Harvard CollegeInventors: David Baltimore, Ranjan Sen, Phillip A. Sharp, Harinder Singh, Louis Staudt, Jonathan H. LeBowitz, Albert S. Baldwin, Jr., Roger G. Clerc, Lynn M. Corcoran, Patrick A. Baeuerle, Michael J. Lenardo, Chen-Ming Fan, Thomas P. Maniatis