70 research outputs found
Neutrino oscillation physics at JUNO
No full textInternational audienceJUNO is a multi-purpose neutrino observatory under construction in China. It will host a liquid scintillator detector underground with an overburden of to study the neutrinos from different neutrino sources. With an unprecedented energy resolution of at , JUNO is designed mainly to detect the anti-neutrinos from the nuclear power plants located from the detector. One of the main physics goals of the experiment is to determine the neutrino mass ordering and to precisely measure the neutrino oscillation parameters , , and using the reactor anti-neutrino flux. The results from JUNO are expected to improve upon the existing knowledge of precision on these three parameters by almost one order of magnitude. Additionally, JUNO can also detect solar and atmospheric neutrinos, and the neutrinos from supernova explosion. It will also search for a wide range of physics including the study of proton lifetimes, indirect dark matter searches, Geo-neutrinos, etc. This contribution will mainly report on the physics of neutrino oscillations with the reactor neutrinos, and discuss the analysis strategy used to treat the various uncertainties and backgrounds in estimating these parameter sensitivities
Study of neutrino oscillation parameters at the INO-ICAL detector using event-by-event reconstruction
No full textAbstract We present the reach of the proposed INO-ICAL in measuring the atmospheric-neutrino-oscillation parameters θ23 and Δm322 using full event-by-event reconstruction for the first time. We also study the fluctuations arising from the low event statistics and their effect on the precision measurements and mass-hierarchy analysis for a 5-year exposure of the 50 kton ICAL detector. We find a mean resolution of Δχ2≈2.9 , which rules out the wrong mass hierarchy of the neutrinos with a significance of approximately 1.7σ . These results on mass-hierarchy are similar to those presented in earlier studies that approximated the performance of the ICAL detector
Effect of Event-By-Event Reconstruction and Low Event Statistics on the Sensitivity of Oscillation Parameters in the INO-ICAL Detector
No full textTwo Value Graph Magma Algebras and Amenability
No full text© 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.We introduce two value graph magma algebras and examine the amenability of their bases for the commutative case. We use these algebras to construct a commutative algebra which has a unique simple basis up to mutual congeniality and no projective bases
Cost analysis and deep-dive in process improvement
No full textThesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, in conjunction with the Leaders for Global Operations Program at MIT, 2017.Thesis: M.B.A., Massachusetts Institute of Technology, Sloan School of Management, in conjunction with the Leaders for Global Operations Program at MIT, 2017.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Cataloged from student-submitted PDF version of thesis.Includes bibliographical references (pages 71-72).Amazon's Prime Pantry is a specialty business that focuses on selling household goods such as toilet paper or bottled water. The business is a part of the consumables portfolio that has consistently met or exceeded forecasts. However as the business grows and lower Average Sales Price (ASP) items are introduced, optimizing the current fulfillment solution is critical to ensure profitability through growth. In 2016, there was a 0-5 ASP range. As a relatively high velocity consumables business, the Pantry platform is well situated to help address this opportunity as well as address fulfillment of items below a 2.27M, only a fraction of the SKUs were analyzed. If case replenishment is automated or more pallets are used in the field, these savings will increase since the Variable Cost Per Unit (VCPU) of handling these items will decrease. The pick to rebin initiative can save the company an additional 0.018. Lastly, the OPEX machine would save 0.013. In total, these savings amount to $3.02M annually. Though the cost improvements are fairly significant, these improvements could prevent the business from needing to open new sites at the current frequency required and will improve the business's current operations immensely. Additionally, it will enable the business to introduce even lower ASP items profitably while improving the customer experience.by Nupur Satchit Dokras.S.M.M.B.A
Graphene
Get PDFL’any 2004, Andre K. Geim i Konstantin S. Novoselov, a la Universitat de Manchester, preparen i identifiquen el grafè a partir del grafit. Aquest treball té una rellevància especial i fa que l’any 2010 ambdós científics rebin el Premi Nobel de Física «pels seus innovadors experiments sobre el caràcter bidimensional del grafè». A banda de la importància del caràcter bidimensional de la seva estructura, el grafè obre nous camps de recerca i estudi tant de les seves propietats com de les aplicacions en l’àmbit de la química i els nous materials. Aquest treball, basat en el discurs inaugural del curs 2012-2013 pronunciat per l’autor a la Reial Acadèmia de Ciències i Arts de Barcelona, presenta una visió introductòria dels aspectes clau del grafè, així com de les seves propietats i aplicacions.Paraules clau: Grafè, matèria bidimensional, nanomaterials.In 2004, Andre K. Geim and Konstantin S. Novoselov of the University of Manchester identified and prepared graphene from graphite. This was an outstanding achievement and in 2010 both scientists were honoured with the Nobel Prize in Physics «for groundbreaking experiments regarding the two-dimensional material grapheme». Besides the importance of the two-dimensional nature of its structure, graphene opens many new fields of research and study in connection with its properties and innovative applications in the fields of chemistry and new materials. This paper, based on the inaugural speech for academic year 2012-2013 given by the author at the Royal Academy of Sciences and Arts of Barcelona, offers an introductory overview of graphene’s key aspects, properties and applications.Keywords: Graphene, two-dimensional material, nanomaterials
The use of life satisfaction diagrams and biographical grids as hybrid tools for the collection of sequential datas
Get PDFThis article describes the characteristics of two types of hybrid tools that are useful for obtaining both quantitative and qualitative data. It reviews how these tools have been used in previously published studies and identifies the advantages and disadvantages of their use. The two types of tools in question are life satisfaction diagrams and biographical grids. Both types of diagrams were originally designed as instruments for obtaining quantitative data within life course research, and later came to be used as either hybrid tools or only as qualitative tools. Both types of diagrams are evaluated mainly on the use made by the author in studies in which he has participated. The main advantages identified can be summarised in two points: (1) the ease of obtaining an accurate representation of complex facts and (2) the opportunity for this representation to stimulate personal reflection. One main limitation common to both diagrams has been identified: they can be difficult to understand unless interviewees receive a clear explanation. This type of diagrams can be seen as a bridge between the life course perspective and mixed methods research, a combination that has been seldom addressed in the methodological literature.En el artículo se describen las características de dos tipos de herramientas híbridas útiles para la obtención conjunta de datos cuantitativos y cualitativos, se revisa el tipo de uso que han tenido en trabajos publicados precedentemente y se identifican las ventajas e inconvenientes de su uso. Estos dos tipos de herramientas son los diagramas de satisfacción vital y las parrillas biográficas. Ambos tipos de diagramas fueron originariamente diseñados como instrumentos de obtención de datos cuantitativos en el marco de la investigación sobre el curso de vida y posteriormente han pasado a ser utilizados también como herramientas híbridas y como herramientas únicamente cualitativas. Ambos tipos de diagramas son evaluados principalmente a partir del uso realizado por el autor en investigaciones en las que ha participado. Las principales ventajas identificadas pueden resumirse en dos puntos: 1) la facilidad para obtener una representación fidedigna de hechos complejos, y 2) la posibilidad de estimular la reflexión personal a partir de dicha representación. Se identifica también una limitación principal común para los dos tipos de diagramas: pueden ser difíciles de entender, a menos que las personas entrevistadas reciban una explicación clara sobre cómo utilizarlos. En cualquier caso, este tipo de diagramas constituyen un puente entre la perspectiva del curso de vida y la investigación con métodos mixtos, una combinación muy poco tratada en la literatura metodológica.En l'article es descriuen les característiques de dos tipus d'eines híbrides útils per a l'obtenció conjunta de dades quantitatives i qualitatives, es revisa el tipus d'ús que han tingut en treballs publicats precedentment i s'identifiquen els avantatges i els inconvenients del seu ús. Aquests dos tipus d'eines són els diagrames de satisfacció vital i les graelles biogràfiques. Tots dos tipus de diagrames van ser originàriament dissenyats com a instruments d'obtenció de dades quantitatives en el marc de la recerca sobre el curs de vida i posteriorment han passat a ser utilitzats també com a eines híbrides i com a eines únicament qualitatives. Tots dos tipus de diagrames són avaluats principalment a partir de l'ús realitzat per l'autor en recerques en les quals ha participat. Els principals avantatges identificats poden resumir-se en dos punts: 1) la facilitat per obtenir una representació fidedigna de fets complexos, i 2) la possibilitat d'estimular la reflexió personal a partir d'aquesta representació. S'identifica també una limitació principal comuna per als dos tipus de diagrames: poden ser difícils d'entendre, tret que les persones entrevistades rebin una explicació clara sobre com utilitzar-los. En tot cas, aquest tipus de diagrames constitueixen un pont entre la perspectiva del curs de vida i la recerca amb mètodes mixtos, una combinació molt poc tractada en la literatura metodològica
Earliest Resolution to the Neutrino Mass Ordering?
No full textWe hereby illustrate and numerically demonstrate via a simplified proof of concept calculation tuned to the latest average neutrino global data that the combined sensitivity of JUNO with NOvA and T2K experiments has the potential to be the first fully resolved (5) measurement of neutrino Mass Ordering (MO) around 2028; tightly linked to the JUNO schedule. Our predictions account for the key ambiguities and the most relevant 1 data fluctuations. In the absence of any concrete MO theoretical prediction and given its intrinsic binary outcome, we highlight the benefits of having such a resolved measurement in the light of the remarkable MO resolution ability of the next generation of long baseline neutrino beams experiments. We motivate the opportunity of exploiting the MO experimental framework to scrutinise the standard oscillation model, thus, opening for unique discovery potential, should unexpected discrepancies manifest. Phenomenologically, the deepest insight relies on the articulation of MO resolved measurements via at least the two possible methodologies matter effects and purely vacuum oscillations. Thus, we argue that the JUNO vacuum MO measurement may feasibly yield full resolution in combination to the next generation of long baseline neutrino beams experiments
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Synergies and Prospects for Early Resolution of the Neutrino Mass Ordering
Get PDFThe measurement of neutrino Mass Ordering (MO) is a fundamental element for
the understanding of leptonic flavour sector of the Standard Model of Particle
Physics. Its determination relies on the precise measurement of and using either neutrino vacuum oscillations, such
as the ones studied by medium baseline reactor experiments, or matter effect
modified oscillations such as those manifesting in long-baseline neutrino beams
(LBB) or atmospheric neutrino experiments. Despite existing MO indication
today, a fully resolved MO measurement (5) is most likely to
await for the next generation of neutrino experiments: JUNO, whose stand-alone
sensitivity is 3, or LBB experiments (DUNE and
Hyper-Kamiokande). Upcoming atmospheric neutrino experiments are also expected
to provide precious information. In this work, we study the possible context
for the earliest full MO resolution. A firm resolution is possible even before
2028, exploiting mainly vacuum oscillation, upon the combination of JUNO and
the current generation of LBB experiments (NOvA and T2K). This opportunity
is possible thanks to a powerful synergy boosting the overall sensitivity where
the sub-percent precision of by LBB experiments is found
to be the leading order term for the MO earliest discovery. We also found that
the comparison between matter and vacuum driven oscillation results enables
unique discovery potential for physics beyond the Standard Model
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