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Статті в журналах з теми "Mode qA0":
1
Kergosien, Nina, Ludovic Gavérina, Guillemette Ribay, Florence Saffar, Pierre Beauchêne, Olivier Mesnil, and Olivier Bareille. "Lead Zirconate Titanate Transducers Embedded in Composite Laminates: The Influence of the Integration Method on Ultrasound Transduction." Materials 16, no. 8 (April 12, 2023): 3057. http://dx.doi.org/10.3390/ma16083057.
Анотація:
In the context of an embedded structural health monitoring (SHM) system, two methods of transducer integration into the core of a laminate carbon fiber-reinforced polymer (CFRP) are tested: cut-out and between two plies. This study focuses on the effect of integration methods on Lamb wave generation. For this purpose, plates with an embedded lead zirconate titanate (PZT) transducer are cured in an autoclave. The embedded PZT insulation, integrity, and ability to generate Lamb waves are checked with electromechanical impedance, X-rays, and laser Doppler vibrometry (LDV) measurements. Lamb wave dispersion curves are computed by LDV using two-dimensional fast Fourier transform (Bi-FFT) to study the quasi-antisymmetric mode (qA0) excitability in generation with the embedded PZT in the frequency range of 30 to 200 kHz. The embedded PZT is able to generate Lamb waves, which validate the integration procedure. The first minimum frequency of the embedded PZT shifts to lower frequencies and its amplitude is reduced compared to a surface-mounted PZT.
2
Sebayang, Ika Sari Damayanthi, and Syaefudin Wibowo. "Pemodelan Curah Hujan-Limpasan Pada Sub DAS Cikapundung Hulu." FORUM MEKANIKA 9, no. 1 (May 31, 2020): 34–41. http://dx.doi.org/10.33322/forummekanika.v9i1.952.
Анотація:
The Cikapundung River is one of the rivers that divides the city of Bandung and is often used as the main drainage center of the city, the flow of sewage or waste, tourism objects, and raw water sources. This causes the importance of observing reliable discharge values flowing on the Cikapundung River. In this study the authors analyzed the availability of minimum river discharge in Cikapundung Hulu Sub Das using the FJ Mock method. This study uses rainfall data and climatology data. The rainfall data used are rainfall data from Dago Pakar station and Meteo Lembang station, with a span of 10 years while the climatological data used is data from the Bandung Geophysical Station with a span of 10 years. Mainstay discharge calculated using the F.J Mock Method, where in the F.J Mock calculation there are a number of parameters assumed. This modeling test process is by calibrating the parameters assumed by Trial and Error. The average discharge magnitude for Q50, Q80, Q90, and Q95 in calculating the mock model in the period 2008 to 2014 resulted in a value of 3.87 m³ / sec; 2.98 m³ / sec; 2.46 m³ / sec; and 2.21 m³ /sec. While the discharge values of Q50, Q80, Q90, and Q95 in the observation debit produce successive values of 3.85 m³ / sec; 2.45 m³ / sec; 2.05 m³ / sec; and 1.91 m³ / sec. Even with the increase in the calculation period, reliable debit values have a tendency to rise.
3
Fachrunnisa and Manyuk Fauzi*. "Perbandingan Debit Andalan Hasil Tank Model terhadap Debit Pengamatan Sungai Tapung Kiri Stasiun Tandun." JURNAL TEKNIK 13, no. 2 (October 29, 2019): 177–85. http://dx.doi.org/10.31849/teknik.v13i2.3600.
Анотація:
Ketelitian suatu model hujan-aliran sangat dibutuhkan guna implementasi keluaran model dalam analisis-analisis hidrologi. Penelitian ini bertujuan untuk melakukan analisis terhadap rasio atau perbandingan hasil model tangki (tank model) terhadap data debit hasil pengamatan. Penelitian dilakukan di sungai Tapung Kiri dengan stasiun pencatatan Tandun. Luas daerah aliran sungai Tapung Kiri dengan titk kontrol (outlet) stasiun Tandun adalah 197,5 km2. Konsep model tangki yang digunakan adalah 4 buah tangki yang disusun secara seri. Hasil perbandingan didasarkan pada nilai root mean square error (RMSE), dimana diperoleh nilai RMSE kondisi musim basah (Q20%) = 6,70; kondisi normal (Q50%) = 4,49 dan musim kering (Q80%) = 5,27. Data debit pengamatan sungai Tapung Kiri rata-rata memiliki nilai tempat satuan, sementara itu nilai RMSE juga memiliki nilai tempat satuan maka dapat disimpulkan bahwa model tangki yang digunakan dalam penelitian ini memiliki kinerja baik.
4
Fachrunnisa and Manyuk Fauzi*. "Perbandingan Debit Andalan Hasil Tank Model terhadap Debit Pengamatan Sungai Tapung Kiri Stasiun Tandun." JURNAL TEKNIK 13, no. 2 (November 26, 2019): 177–85. http://dx.doi.org/10.31849/teknik.v13i2.3476.
Анотація:
Ketelitian suatu model hujan-aliran sangat dibutuhkan guna implementasi keluaran model dalam analisis-analisis hidrologi. Penelitian ini bertujuan untuk melakukan analisis terhadap rasio atau perbandingan hasil model tangki (tank model) terhadap data debit hasil pengamatan. Penelitian dilakukan di sungai Tapung Kiri dengan stasiun pencatatan Tandun. Luas daerah aliran sungai Tapung Kiri dengan titk kontrol (outlet) stasiun Tandun adalah 197,5 km2. Konsep model tangki yang digunakan adalah 4 buah tangki yang disusun secara seri. Hasil perbandingan didasarkan pada nilai root mean square error (RMSE), dimana diperoleh nilai RMSE kondisi musim basah (Q20%) = 6,70; kondisi normal (Q50%) = 4,49 dan musim kering (Q80%) = 5,27. Data debit pengamatan sungai Tapung Kiri rata-rata memiliki nilai tempat satuan, sementara itu nilai RMSE juga memiliki nilai tempat satuan maka dapat disimpulkan bahwa model tangki yang digunakan dalam penelitian ini memiliki kinerja baik.
5
Putri, Putu Indah Dianti, I. Gusti Ngurah Putu Dharmayasa, and Irma Suryanti. "DEBIT ANDALAN MODEL NRECA PADA DAS AYUNG MENDUKUNG PENGELOLAAN SEDIMENTASI DI MUARA SUNGAI." Jurnal Ilmiah Teknik Sipil 27, no. 2 (November 6, 2023): 139. http://dx.doi.org/10.24843/jits.2023.v27.i02.p01.
Анотація:
Muara sungai Ayung kerap mengalami sedimentasi yang menyebabkan terjadinya banjir pada daerah hulu. Pemahaman yang baik tentang debit andalan sangat penting dalam pengelolaan sedimentasi di muara sungai, karena dapat membantu mengatur aliran air sungai yang optimal, mengdidentifikasi debit air pada musim hujan dan kemarau, mencegah erosi dan sedimentasi berlebihan, serta mempertahankan keberlanjutan ekosistem di muara sungai. Metode NRECA adalah salah satu metode yang dapat digunakan untuk memperkirakan debit andalan dari model simulasi hujan-limpasan. Tujuan penelitian ini adalah untuk mendapatkan besaran debit andalan pada DAS Ayung yang dapat digunakan dalam pengelolaan muara sungai khususnya mencegah terjadinya ketidaklancaran pembuangan debit banjir menuju laut. Ketersediaan air yang ditunjukkan dengan debit andalan pada DAS Ayung pada kondisi musim basah (Q20%) didapatkan debit maksimum sebesar 32.09 m3/detik terjadi pada bulan Januari dan debit minimum sebesar 7.58 m3/detik terjadi pada bulan Juni. Kondisi musim kering (Q80%) didapatkan debit maksimum sebesar 10.76 m3/detik terjadi pada bulan Januari dan debit minimum sebesar 0.68 m3/detik terjadi pada bulan Juni. Sedangkan kondisi normal (Q50%) didapatkan debit maksimum sebesar 22.84 m3/detik terjadi pada bulan Januari dan debit minimum sebesar 1.74 m3/detik terjadi pada bulan Agustus.
6
Pereira, Sara, Flávio Bastos, Carla Santos, José Maia, Go Tani, Leah E. Robinson, and Peter T. Katzmarzyk. "Variation and Predictors of Gross Motor Coordination Development in Azorean Children: A Quantile Regression Approach." International Journal of Environmental Research and Public Health 19, no. 9 (April 29, 2022): 5417. http://dx.doi.org/10.3390/ijerph19095417.
Анотація:
We investigated the development of gross motor coordination (GMC) as well as its predictors in school-aged Azorean children. The sample included 181 children (90 girls), followed consecutively for 4 years from 6 to 9 years of age. GMC was assessed with the Körperkoordinationstest für Kinder, and predictors included body mass index, standing long jump, 50-yard dash, and shuttle run. The changes in GMC and the effects of predictors were analyzed with mean-modeling as well as quantile regression. In the latter, we considered the following three quantiles (Q): Q20, Q50, and Q80 as markers of low, median, and high GMC levels, respectively. All analyses were conducted using R software and alpha was set at 5%. The GMC changes were curvilinear in both models, but the quantile approach showed a more encompassing picture of the changes across the three quantiles in both boys and girls with different rates of change. Further, the predictors had different effect sizes across the quantiles in both sexes, but in the mean-model their effects were constant. In conclusion, quantile regression provides more detailed information and permits a more thorough understanding of changes in GMC over time and the influence of putative predictors.
7
Mustamin, M. R., F. Maricar, and R. Karamma. "Modeling of Flood Prone Areas In The Kelara Watershed." IOP Conference Series: Earth and Environmental Science 1134, no. 1 (January 1, 2023): 012006. http://dx.doi.org/10.1088/1755-1315/1134/1/012006.
Анотація:
Abstract One of the efforts to minimize the negative impacts of flooding in the Kelara Watershed is to make model flood-prone areas that can be used as an initial reference for flood disaster mitigation. The analytical method used is hydraulic analysis using 2D HECRAS numerical simulations to determine areas affected by flooding based on flood discharge at a return period of 2 - 100 years. Based on the simulation results, it is found that the discovery area for Q2 is 331.42 Ha, Q5 is 547.21 Ha, Q10 is 798.76 Ha, Q20 is 925.11 Ha, Q25 is 925.79 Ha, Q50 is 1048.48 Ha, and Q100 is 1146.71 Ha. From the results of the flood depth verification, it was also known that the flood that occurred on January 22, 2019 was approaching the 100 year return period flood and June 12, 2020, was approaching the 20 year return period flood. So from the results of mapping and field verification, it is known that the 4 affected districts are Binamu District, Kelara District, Turatea District, and Biringbulu District with the location of the worst flooding occurred in Sapanang Village, Binamu District.
8
Rintis, Hadiani, Suyanto, and Yosephina Puspa Setyoasri. "Rainfall-Discharge Simulation in Bah Bolon Catchment Area by Mock Method, NRECA Method, and GR2M Method." Applied Mechanics and Materials 845 (July 2016): 24–29. http://dx.doi.org/10.4028/www.scientific.net/amm.845.24.
Анотація:
Rainfall-discharge simulation is a process transformation from rainfall to discharge in a catchment area by modelling. The most popular models are Mock method and NRECA method. It is according to the handbook of irrigation that is written by government (Indonesia). GR2M (Global Rainfall-Runoff Model) is a new model that is not usual to be used in Indonesia. GR2M is a simulation model that needs less parameter than Mock and NRECA methods. This research was conducted in the Bah Bolon catchment area, Simalungun, North Sumatra. It will analyze the simulation of rainfall-discharge by three methods, Mock, NRECA, and GR2M without considering whether the watershed was wet or dry watershed. The analysis was computed the dependable discharge by flow duration curve (fdc) in a series data on each method. The parameter that compared was the dependable discharge, i.e. the discharge with probability 70% (Q70), probability 80% (Q80), and probability 90% (Q90). GR2M will compared with Mock, then compared with NRECA. The results show that the discharge simulation by GR2M methods and the discharge simulation by Mock method has correlation 0.968. The discharge simulation by GR2M method and the discharge simulation by NRECA method has correlation 0,955. It means that GR2M close to the both of them, but GR2M can used easily because it has less parameter than the other. Based on the graphic, GR2M close to the Mock method for probability more than 50%. So, if the probability is 70%, 80%, and 90%, then GR2M method close to Mock method.
9
Vetter, T., S. Huang, V. Aich, T. Yang, X. Wang, V. Krysanova, and F. Hattermann. "Multi-model climate impact assessment and intercomparison for three large-scale river basins on three continents." Earth System Dynamics Discussions 5, no. 2 (July 4, 2014): 849–900. http://dx.doi.org/10.5194/esdd-5-849-2014.
Анотація:
Abstract. Climate change impacts on hydrological processes should be simulated for river basins using validated models and multiple climate scenarios in order to provide reliable results for stakeholders. In the last 10–15 years climate impact assessment was performed for many river basins worldwide using different climate scenarios and models. Nevertheless, the results are hardly comparable and do not allow to create a full picture of impacts and uncertainties. Therefore, a systematic intercomparison of impacts is suggested, which should be done for representative regions using state-of-the-art models. Our study is intended as a step in this direction. The impact assessment presented here was performed for three river basins on three continents: Rhine in Europe, Upper Niger in Africa and Upper Yellow in Asia. For that, climate scenarios from five GCMs and three hydrological models: HBV, SWIM and VIC, were used. Four "Representative Concentration Pathways" (RCPs) covering a range of emissions and land-use change projections were included. The objectives were to analyze and compare climate impacts on future trends considering three runoff quantiles: Q90, Q50 and Q10 and on seasonal water discharge, and to evaluate uncertainties from different sources. The results allow drawing some robust conclusions, but uncertainties are large and shared differently between sources in the studied basins. The robust results in terms of trend direction and slope and changes in seasonal dynamics could be found for the Rhine basin regardless which hydrological model or forcing GCM is used. For the Niger River scenarios from climate models are the largest uncertainty source, providing large discrepancies in precipitation, and therefore clear projections are difficult to do. For the Upper Yellow basin, both the hydrological models and climate models contribute to uncertainty in the impacts, though an increase in high flows in future is a robust outcome assured by all three hydrological models.
10
Saleh, Ayuko Hirani, Akira Tai, Shinichiro Yano, and Mukhsan Putra Hatta. "Implementation of Hydrological Model for the Malino Catchment Area in South Sulawesi Province, Indonesia." Journal of Disaster Research 18, no. 7 (October 1, 2023): 806–13. http://dx.doi.org/10.20965/jdr.2023.p0806.
Анотація:
In South Sulawesi, the development of irrigation may be hindered by the continuing limitations and inadequacies of hydrological data. It is well known that the rainfall monitoring station is more extensive than the river flow monitoring station. Therefore, the Malino Catchment Area was selected to illustrate the theory of four tank components. The 1st tank (tank A) has two horizontal outlets (Qa1 and Qa2) and one vertical outlet (Ia); the 2nd tank (tank B) has one horizontal outlet (Qb) and one vertical outlet (Ib); the 3rd tank (tank C) has the same conceptual structure as tanks A and B; and the 4th tank (tank D) has only one horizontal outlet (Qd). To ensure that the tank model represents vertical and horizontal flows in a watershed region, the flows (Qa1, Qa2, Qb, Qc, and Qd) are predicted to accumulate in one flow, more or less, and must equal the measured discharge (Qo) at the specified time. Rainfall and evapotranspiration data are required to calculate this model. The 264.55 km2 (25902 ha) research area has an elevation range of 400–2400 masl. The findings for land use are dominated by plantations (41.01%), forests (40.79%), rice fields (15.44%), and residential areas (0.96%). In the calibration of the tank model, R2 is evaluated at 0.560% (good) and Nash–Sutcliffe efficiency is evaluated at 0.526% (good) to ensure that the model can represent the distribution of water flow components. Additionally, the measurements for the total water flow (Qtotal) were 13702 m3/y with a total rainfall of 3996 mm/y. Furthermore, surface flow accounts for 77.26% of the total runoff water, while intermediate flow accounts for 20.25%.
Дисертації з теми "Mode qA0":
1
Kergosien, Nina. "Instrumentation de plaque composite de type aéronautique pour le contrôle santé intégré." Electronic Thesis or Diss., Ecully, Ecole centrale de Lyon, 2024. http://www.theses.fr/2024ECDL0008.
Анотація:
Des systèmes CSI sont actuellement à l'étude pour vérifier l'intégrité des matériaux composites des aéronefs. Ils permettent d’optimiser la maintenance, en donnant la possibilité de suivre l’état des structures en temps réel ou de contrôler ponctuellement des pièces difficiles d’accès par les méthodes de CND courantes. Les matériaux composites offrent la possibilité d’intégrer un système CSI directement à cœur du matériau. De cette façon, l’instrumentation est protégée de l’environnement et les problématiques de collage en surface sont résolues. L'objectif de cette thèse est de déterminer les effets de l'intégration de transducteurs ultrasonores piézoélectriques à cœur d'un composite PRFC stratifié de type aéronautique sur leur comportement en émission et en réception afin de montrer les avantages et inconvénients d'une telle intégration à cœur pour le monitoring de ces structures par ondes de Lamb. Les transducteurs PZT minces se sont révélés être les transducteurs les plus adaptés à l'intégration, car ils supportent les conditions d'élaboration d'un composite de structures aéronautiques élaboré en autoclave (7 bar et 180°C) et sont capables d'émettre et de recevoir des ondes guidées se propageant dans les plaques. La méthode d'intégration a été adaptée pour préserver l'intégrité des PZT et optimiser leur capacité d'émission d'ondes dans un composite. A cette occasion, la capacité des mesures d'impédance électromécanique à vérifier rapidement l'efficacité de la mise en œuvre de l'intégration a été validée. La caractérisation du champ d'onde qA0 a été réalisée expérimentalement, grâce aux déplacements hors plan mesurées avec un vibromètre laser suite à l'excitation de disques PZT intégrés à des fréquences comprises entre 30 et 200 kHzLa capacité du PZT intégré à détecter un défaut simulé de type aimant est aussi étudiée en essai d'émission-réception et est comparé avec le comportement de PZT couplés en surface de composite. Une étude par modélisation fréquentielle multiphysique a ensuite été réalisée afin de mettre en évidence les phénomènes physiques mis en jeu par l'intégration d'un PZT à cœur de composite. Ainsi, la direction des plis en contact du PZT intégré, la profondeur d'intégration et le couplage du PZT au composite influent sur le mécanisme de transduction ultrasonore. De plus, les contraintes induites par l'actionneur PZT ne permettent pas d'être simplifiées sous forme d'un modèle de type pin-force habituellement utilisé comme chargement d'un PZT en surface de matériau isotrope. En effet, les contraintes induites localement par l'excitation du PZT intégré ne sont pas radiales et dépendent de l'électrode du PZT considérée ainsi que des fréquences de génération d'ondesSHM systems are currently being developed to check the integrity of aircraft composite materials. These systems will help optimize maintenance by enabling real-time monitoring of structural condition, or spot-checking of parts that are difficult to access using conventional NDT methods. Composite materials offer the possibility of integrating a SHM system directly into the material. In this way, the instrumentation is protected from the environment and surface bonding issues are resolved. The aim of this thesis is to determine the effects of integrating piezoelectric transducers into the core of an aeronautical laminated CFRP composite on their Lamb-wave emission and reception abilities, in order to demonstrate the advantages and disadvantages for the design of a defect detection SHM system. Thin PZT transducers proved to be the most suitable ones for integration, as they can withstand the processing conditions of an autoclave-processed composite (7 bar and 180°C). They are also capable of transmitting and receiving guided waves, which are propagating in the plates. Moreover, the integration method was adapted to preserve the integrity of the PZTs and to optimize their ability to transmit waves in a composite. In order to assess the effectiveness of the integration, electromechanical impedance measurements were made a fast checking process. Characterization of qA0 mode wavefield transmitted by embedded PZT was carried out experimentally. Surface-bonded and embedded PZT were excited at frequencies between 30 and 200 kHz, while out-of-plane displacements were measured with a laser vibrometer. The ability of the embedded PZT to detect a simulated magnet-type defect are also studied in pitch-catch tests, and compared with the behavior of surface-bonded PZT to the composite surface. A dynamic finite element modelling study was then conducted to highlight the physical phenomena induced by the integration of a PZT in the composite core. The direction of the plies in contact with the embedded PZT, the depth of integration and the coupling of the PZT with the composite are influencing the ultrasonic transduction mechanism. Furthermore, it appears that the stresses induced by the PZT actuator cannot be simplified by the pin-force model usually used to load a PZT on an isotropic material surface in flaw detection models. These stresses are not radially oriented and depend on the PZT electrode considered, as well as on the wave generation frequencies
2
Zhang, Xu. "Modeling & Performance Analysis of QAM-based COFDM System." University of Toledo / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1310148963.
3
Castro, Sofia Balbina Santos Dias de. "Mode interactions with symmetry." Thesis, University of Warwick, 1993. http://wrap.warwick.ac.uk/4041/.
Анотація:
This thesis deals with steady-state mode interaction problems with symmetry. We prove several results concerning problems invariant under the action of an arbitrary compact Lie group Γ. These include the existence of mixed-mode solutions and secondary Hopf bifurcations. We also consider the unfolding of the equations characterizing such problems. Where appropriate, we distinguish the case when Γ acts trivially on one of the modes. We then apply the results to the problems of the (1,3)-, (1,5)- and (1,3,5)-mode interactions with spherical symmetry. We also consider the (3,5)- and the (1,3,5)-mode interaction problems with SO(3) symmetry.
4
Behrens, Gundula Ragna. "Mode jumping in MCMC." Thesis, University of Bath, 2008. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.478942.
Анотація:
Markov Chain Monte Carlo (MCMC) methods often have difficulties in moving between isolated modes. To understand these difficulties, some MCMC theory and some mode jumping approaches will be reviewed, first in fixed dimension and later in variable dimension. The focus will lie on improving the eficiency of the powerful, but computationally expensive method "tempered transitions". A technique for optimising the method's parameters ("temperatures") will be proposed. It will be demonstrated that the default choice of geometric temperatures can be far from optimal. The tuning technique will then be tested on a hard applied sampling problem, namely on sampling from a fixed-dimensional mixture model. The results will show that the optimisation is robust and performs well and that tempered transitions achieves mode jumping ("label-switching") where standard MCMC fails. Since mixture models are often of variable dimension, it will be verified that tempered transitions and the tuning technique can also be applied in variable-dimensional problems. Tests on a variable-dimensional mixture model will confirm that tempered transitions also improves jumps between dimensions.
5
Potgieter, Marnie. "Cellular effects of Coenzyme Q10 and resveratrol in the SJL/J dysferlinopathy mouse model." Thesis, University of Pretoria, 2010. http://hdl.handle.net/2263/24175.
Анотація:
The muscular dystrophies (MDs) are genetic disorders of muscle degeneration due to mutations in genes that encode a wide variety of proteins. Dysferlinopathy encompasses a large variety of neuromuscular diseases characterized by the absence of dysferlin in skeletal muscle and an autosomal recessive mode of inheritance. Dysferlinopathy can manifest as limb girdle muscular dystrophy type 2B (LGMD 2B), Miyoshi myopathy (MM) or distal myopathy with anterior tibial onset (DMAT). The first symptoms usually appear during the second or third decade of life as clumsiness when running, fatigue when walking long distances and difficulty in climbing stairs. Progression of the disease eventually leads to a loss of ambulation. A deficit in membrane-repair machinery in dysferlinopathy suggested a direct role for dysferlin in the Ca2+-dependent membrane-repair process. Recently, dysferlin has also been implicated in the process of chemotaxis. Evidence exists that free radical mediated injury contributes to the pathogenesis of muscle necrosis in the muscular dystrophies. The imbalance of free radical synthesis and antioxidant capacity has been suggested to contribute to the necrotic process. It is therefore imperative to explore the effect of antioxidant supplementation in the MDs. The present study followed a novel approach in investigating the cellular effects afforded by the supplementation of the SJL/J mouse model for dysferlinopathy with the antioxidants, Coenzyme Q10 (CoQ10) and resveratrol. The study aimed to determine, at cellular level, the histopathology and ultrastructural changes in the SJL/J mouse model following a 90 day trial with antioxidant supplementation. In addition to studying the morphology, the study paid attention to nonspecific parameters. The study mainly focused on the histopathology and ultrastructural alterations in the SJLL/J mouse. In addition the oxidative stress index of the affected quadriceps muscle was determined. The outcome provides evidence that increased oxidative stress levels are present in the SJL/J mouse. Antioxidant supplementation with CoQ10 at 120mg/kg/day or a resveratrol/CoQ10 combination supplementation at 40 and 60mg/kg/day, decreased the levels of oxidative stress and dystrophic markers at a cellular level. In addition, increased physical strength was observed. This thesis provides evidence to create a new platform for combination therapeutic strategies.Thesis (PhD)--University of Pretoria, 2010.
Anatomy
unrestricted
6
Hill, Andrew Stephen. "O(2) equivariant mode interactions." Thesis, University of Warwick, 1988. http://wrap.warwick.ac.uk/99595/.
Анотація:
This thesis uses and develops methods of equivariant bifurcation theory in the context of 0(2) equivariant steady-state and Hopf mode interactions in circumstances where both two and three modes interact. The general actions of the 0(2) orthogonal group are applied to these mode interactions and as an illustration the 0(2) equivariant steady-state/Hopf/Hopf mode interaction is placed in the context of the Taylor-Couette system.
7
Gehre, Christian. "Development of a model of the new born child dummy Q0 /." Düsseldorf : VDI-Verl, 2007. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=016244739&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
8
Licitra, Floriana. "Pathophysiological and molecular characterization of a mouse model of ARCA2, a recessive cerebellar ataxia associated to Coenzyme Q10 deficiency." Thesis, Strasbourg, 2013. http://www.theses.fr/2013STRAJ096/document.
Анотація:
ARCA2 est une ataxie récessive qui se caractérise par une atrophie du cervelet et un léger déficit en coenzyme Q10. Des mutations dans le gène ADCK3 ont été récemment identifiées comme étant la cause d’ARCA2. ADCK3 code pour une kinase mitochondriale atypique, qui pourrait être impliquée dans la biosynthèse du coenzyme Q10. L’objectif de mon projet de thèse était d’élucider la physiopathologie d’ARCA2 en utilisant le modèle murin knockout pour Adck3. J’ai ainsi pu montrer que les souris Adck3-/- reproduisent de nombreux symptômes associés à ARCA2 et constituent un bon modèle pour étudier ARCA2. Au niveau du cervelet, les cellules de Purkinje sont spécifiquement touchées et présentent des anomalies morphologiques et fonctionnelles. Un léger défaut mitochondrial a été observé dans les muscles squelettiques des souris Adck3-/-. Enfin, une analyse transcriptomique de ces deux tissus a révélé des altérations de nombreuses voies, impliquant ADCK3 dans de nouveaux processus cellulairesARCA2 is a form of recessive ataxia characterized by a slow progression of the ataxic phenotype, cerebellar atrophy and mild deficit in Coenzyme Q10. ARCA2 was recently found associated with mutations in the ADCK3 gene that encodes a putativemitochondrial kinase homologous to the yeast Coq8 and the bacterial UbiB proteins, which are required for Coenzyme Q biosynthesis. In order to elucidate the pathophysiology of ARCA2, a constitutive knockout mouse for Adck3 was generated.Adck3-/- mice reproduce many ARCA2 symptoms such as slow progression of the ataxic phenotype and mild Coenzyme Q deficit, suggesting that Adck3-/- mice are a good model to study ARCA2. Strikingly, a morphological and functional impairmentwas found in cerebellar Adck3-/- Purkinje cells, whereas a mild mitochondrial defect was observed in the skeletal muscle of Adck3-/- mice. Interestingly, transcriptomic analyses revealed alteration in a number of molecular pathways implicating ADCK3in novel cellular processes
9
Wan, Derek. "On the supermarket model with memory." Thesis, London School of Economics and Political Science (University of London), 2012. http://etheses.lse.ac.uk/588/.
10
Gopal, Pillay Khuneswari. "Model selection and model averaging in the presence of missing values." Thesis, University of Glasgow, 2015. http://theses.gla.ac.uk/6834/.
Анотація:
Model averaging has been proposed as an alternative to model selection which is intended to overcome the underestimation of standard errors that is a consequence of model selection. Model selection and model averaging become more complicated in the presence of missing data. Three different model selection approaches (RR, STACK and M-STACK) and model averaging using three model-building strategies (non-overlapping variable sets, inclusive and restrictive strategies) were explored to combine results from multiply-imputed data sets using a Monte Carlo simulation study on some simple linear and generalized linear models. Imputation was carried out using chained equations (via the "norm" method in the R package MICE). The simulation results showed that the STACK method performs better than RR and M-STACK in terms of model selection and prediction, whereas model averaging performs slightly better than STACK in terms of prediction. The inclusive and restrictive strategies perform better in terms of prediction, but non-overlapping variable sets performs better for model selection. STACK and model averaging using all three model-building strategies were proposed to combine the results from a multiply-imputed data set from the Gateshead Millennium Study (GMS). The performance of STACK and model averaging was compared using mean square error of prediction (MSE(P)) in a 10% cross-validation test. The results showed that STACK using an inclusive strategy provided a better prediction than model averaging. This coincides with the results obtained through a mimic simulation study of GMS data. In addition, the inclusive strategy for building imputation and prediction models was better than the non-overlapping variable sets and restrictive strategy. The presence of highly correlated covariates and response is believed to have led to better prediction in this particular context. Model averaging using non-overlapping variable sets performs better only if an auxiliary variable is available. However, STACK using an inclusive strategy performs well when there is no auxiliary variable available. Therefore, it is advisable to use STACK with an inclusive model-building strategy and highly correlated covariates (where available) to make predictions in the presence of missing data. Alternatively, model averaging with non-overlapping variables sets can be used if an auxiliary variable is available.
Книги з теми "Mode qA0":
1
Lubis, Firman. Studi operations research (OR), pengembangan model quality assurance (QA). Jakarta: Badan Koordinasi Keluarga Berencana Nasional, 2000.
2
Boudreau, Joseph F., and Eric S. Swanson. Some useful classes with applications. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198708636.003.0003.
Анотація:
In this learn-by-doing chapter, some widely available classes are introduced and employed to solve problems in the physical sciences. By using linear algebra classes from the Eigen package, collection classes from the C++ standard library, and function classes from the authors’ own Qat libraries, readers become familiar some classes that can be effectively applied in physics computation and which are illustrative of good class design. Practice obtained in using these classes is intended to be helpful in understanding the more formal treatment of C++ concepts in subsequent chapters. Physics applications include familiar problems such as coupled oscillations and quantum mechanical scattering in one dimension from piecewise-constant potentials, for which computational methods are necessary in all but the simplest cases. Visualization of functions with the Qt-based Qat library is also introduced.
3
Ray, Sumantra (Shumone), Sue Fitzpatrick, Rajna Golubic, Susan Fisher, and Sarah Gibbings, eds. Audits and inspections. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780199608478.003.0024.
Анотація:
Audits and inspections are a vital and well recognised part of the clinical trial process. The requirement for quality data is recognised by everyone who works in clinical research. The ability to maintain accuracy and quality throughout a clinical trial is a dynamic process which involves both ongoing quality control (QC) steps and systematic and independent quality assurance (QA). This chapter starts by outlining the comparison between QC and QA and how these important processes form part of a Quality Management System (QMS) for an organisation. Additionally, we cannot begin to start discussing aspects of quality in clinical research without thinking about Good Clinical Practice (GCP) and this is frequently referenced throughout the chapter. Establishing a QA Unit, especially in the healthcare environment can be daunting. There always seems to be so many priorities and there are often pressures from within the organisation or from other teams for your help and support. It is important to allocate resources carefully to ensure the QA Unit is effective. By having an effective Quality Management System and a QA programme of effectual audits means that a range of possible risks may be prevented. Study-specific audits looking particularly at site audits are discussed as well as a systems based approach which is more common in larger QA Units. The audit process is reviewed in detail for both internal and external audits. Finally, inspection preparation, the inspection process and a detailed comparison of EMA, FDA and MHRA regulations used by inspectors is presented.
4
Clarke, Andrew. Temperature, growth and size. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780199551668.003.0013.
Анотація:
Growth involves two flows of energy. The first is chemical potential energy in the monomers used to construct the proteins, lipids, polysaccharides and nucleic acids forming the new tissue. The second is the metabolic energy (ATP or GTP) used to construct the new tissue; this is the metabolic cost of growth and can be expressed as a dimensionless fraction of the energy retained in the new tissue. Its value is ~0.33. Typical temperature sensitivities for growth in the wild lie in the range Q10 1.5 – 3. Within species there may be evolutionary adjustments to growth rate to offset the effects of temperature, though these involve trade-offs with other physiological factors affecting fitness. Outside the tropics, many mammals and birds exhibit a cline in size, with larger species at higher latitudes (Bergmann’s rule). Carl Bergmann predicted such a cline from biophysical arguments based on endotherm thermoregulatory costs; Bergmann’s rule thus applies only to mammals and birds. Many ectotherms grow more slowly but attain a larger adult size when grown at lower temperatures (the temperature-size rule). The large size of some aquatic invertebrates at lower temperatures (notably in the polar regions and the deep sea) is associated with a higher oxygen content of the water.
5
Pediatric ICD-10-CM. American Academy of Pediatrics, 2015. http://dx.doi.org/10.1542/9781581109016.
Анотація:
In this first edition, Pediatric ICD-10-CM: A Manual for Provider-Based Coding strives to bring to the pediatric provider, coder, and biller the most accurate and easy-to use manual on ICD-10-CM yet. Composed entirely with a pediatrics focus, this manual exclusively features codes and guidelines for physician- and provider-based coding, all in a simplified yet familiar format. The full draft of the ICD-10-CM code set comes in at well over 1,000 pages. This book condenses that large and potentially cumbersome book into 400 pages of the most relevant,pediatrics-related codes and guidelines. It also fully integrates into the tabular list specific chapter and code guidelines. Guideline are now included directly at the chapter and code level, ensuring that coders will always use the right codes in right circumstances Features include Integrated codes and guidelines Simplified yet familiar layout Tabular and indexed navigation Pediatric-focused and provider-based guidance And more... Contents Include: ICD-10-CM Official Guidelines for Coding and Reporting: FY 2015 Certain Infectious and Parasitic Diseases (A00-B99) Neoplasms (C00-D49) Diseases of the Blood and Blood-Forming Organs and Certain Disorders Involving the Immune Mechanism (D50-D89) Endocrine, Nutritional and Metabolic Diseases (E00-E89) Mental, Behavioral and Neurodevelopmental Disorders (F01-F99) Diseases of the Nervous System (G00-G99) Diseases of the Eye and Adnexa (H00-H59) Diseases of the Ear and Mastoid Process (H60-H95) Diseases of the Circulatory System (I00-I99) Diseases of the Respiratory System (J00-J99) Diseases of the Digestive System (K00-K95) Diseases of the Skin and Subcutaneous Tissue (L00-L99) Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) Diseases of the Genitourinary System (N00-N99) Pregnancy, Childbirth, Certain Conditions Originating in the Perinatal Period (P00-P99) Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99) Symptoms, Signs, and Abnormal Clinical and Laboratory Findings (R00-R99) Injury, Poisoning and Consequences of Certain Other External Causes (S00-T88) External Causes of Morbidity (V00-Y99) Factors Influencing Health Status and Contact With Health Services (Z00-Z99)
6
Hall, Andrew, and Shamima Rahman. Mitochondrial diseases and the kidney. Edited by Neil Turner. Oxford University Press, 2015. http://dx.doi.org/10.1093/med/9780199592548.003.0340.
Анотація:
Mitochondrial disease can affect any organ in the body including the kidney. As increasing numbers of patients with mitochondrial disease are either surviving beyond childhood or being diagnosed in adulthood, it is important for all nephrologists to have some understanding of the common renal complications that can occur in these individuals. Mitochondrial proteins are encoded by either mitochondrial or nuclear DNA (mtDNA and nDNA, respectively); therefore, disease causing mutations may be inherited maternally (mtDNA) or autosomally (nDNA), or can arise spontaneously. The commonest renal phenotype in mitochondrial disease is proximal tubulopathy (Fanconi syndrome in the severest cases); however, as all regions of the nephron can be affected, from the glomerulus to the collecting duct, patients may also present with proteinuria, decreased glomerular filtration rate, nephrotic syndrome, water and electrolyte disorders, and renal tubular acidosis. Understanding of the relationship between underlying genotype and clinical phenotype remains incomplete in mitochondrial disease. Proximal tubulopathy typically occurs in children with severe multisystem disease due to mtDNA deletion or mutations in nDNA affecting mitochondrial function. In contrast, glomerular disease (focal segmental glomerulosclerosis) has been reported more commonly in adults, mainly in association with the m.3243A<G point mutation. Co-enzyme Q10 (CoQ10) deficiency has been particularly associated with podocyte dysfunction and nephrotic syndrome in children. Underlying mitochondrial disease should be considered as a potential cause of unexplained renal dysfunction; clinical clues include lack of response to conventional therapy, abnormal mitochondrial morphology on kidney biopsy, involvement of other organs (e.g. diabetes, cardiomyopathy, and deafness) and a maternal family history, although none of these features are specific. The diagnostic approach involves acquiring tissue (typically skeletal muscle) for histological analysis, mtDNA screening and oxidative phosphorylation (OXPHOS) complex function tests. A number of nDNA mutations causing mitochondrial disease have now been identified and can also be screened for if clinically indicated. Management of mitochondrial disease requires a multidisciplinary approach, and treatment is largely supportive as there are currently very few evidence-based interventions. Electrolyte deficiencies should be corrected in patients with urinary wasting due to tubulopathy, and CoQ10 supplementation may be of benefit in individuals with CoQ10 deficiency. Nephrotic syndrome in mitochondrial disease is not typically responsive to steroid therapy. Transplantation has been performed in patients with end-stage kidney disease; however, immunosuppressive agents such as steroids and tacrolimus should be used with care given the high incidence of diabetes in mitochondrial disease.
Частини книг з теми "Mode qA0":
1
Butkiewicz, Bohdan S. "Fuzzy Model of QPSK and QAM Modulation." In Emerging Intelligent Technologies in Industry, 297–305. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-22732-5_24.
2
Mohini, Anshu Priya, Samarendra Nath Sur, and Soumyasree Bera. "LabVIEW-Based Software and Hardware Implementation of 16-QAM Modem." In Advances in Communication, Devices and Networking, 221–27. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-3450-4_25.
3
Li, Junchen, Haigang Zhang, and Jinfeng Yang. "Discrimination Model of QAR High-Severity Events Using Machine Learning." In Intelligence Science and Big Data Engineering. Big Data and Machine Learning, 430–41. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-36204-1_36.
4
Abdolmaleki, Behzad, Helger Lipmaa, Janno Siim, and Michał Zając. "On QA-NIZK in the BPK Model." In Lecture Notes in Computer Science, 590–620. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-45374-9_20.
5
Kumar, Shobhan, and Arun Chauhan. "A Finetuned Language Model for Recommending cQA-QAs for Enriching Textbooks." In Advances in Knowledge Discovery and Data Mining, 423–35. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-75765-6_34.
6
Darojat, Ojat, and Wei Li. "Quality Assurance at Mega Universities." In Handbook of Open, Distance and Digital Education, 1–18. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-0351-9_40-1.
Анотація:
AbstractWithin the community of distance and online education, quality and quality assurance have been one of the most talked and discussed areas. This is especially true within the context of mega open universities where policies are always designed to optimize the openness, flexibility, and accessibility of the system. Even though distance education had initially been associated with opening access to education, the quality of education has become more and more important in line with the advancement of technology use throughout the system. It is within this quality paradigm that quality assurance (QA) has become one of the key aspects in planning and managing open, distance, and digital education (ODDE). This paradigm has also brought many ODDE providers including the mega open universities to reformulate their visions, missions, and strategies to address quality issues more adequately (Belawati & Zuhairi, 2007). This chapter explores the implementation of quality assurance (QA) programs at two mega universities, Universitas Terbuka and Open University of China, which have developed QA system and implemented systematic QA programs consistently, resulting in their enhanced quality of learning over the years. The discussion will start with a general overview about the universities, followed by their internal QA systems and implementations. The two exemplary QA systems and practices would illustrate how mega open universities undertake the quality assurance programs to ensure continuous improvement as well as to develop quality cultures within the respective institutions.
7
Darojat, Ojat, and Wei Li. "Quality Assurance at Mega Universities." In Handbook of Open, Distance and Digital Education, 725–42. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-2080-6_40.
Анотація:
AbstractWithin the community of distance and online education, quality and quality assurance have been one of the most talked and discussed areas. This is especially true within the context of mega open universities where policies are always designed to optimize the openness, flexibility, and accessibility of the system. Even though distance education had initially been associated with opening access to education, the quality of education has become more and more important in line with the advancement of technology use throughout the system. It is within this quality paradigm that quality assurance (QA) has become one of the key aspects in planning and managing open, distance, and digital education (ODDE). This paradigm has also brought many ODDE providers including the mega open universities to reformulate their visions, missions, and strategies to address quality issues more adequately (Belawati & Zuhairi, 2007). This chapter explores the implementation of quality assurance (QA) programs at two mega universities, Universitas Terbuka and Open University of China, which have developed QA system and implemented systematic QA programs consistently, resulting in their enhanced quality of learning over the years. The discussion will start with a general overview about the universities, followed by their internal QA systems and implementations. The two exemplary QA systems and practices would illustrate how mega open universities undertake the quality assurance programs to ensure continuous improvement as well as to develop quality cultures within the respective institutions.
8
Russell-Buckland, Joshua, P. Kaynezhad, S. Mitra, G. Bale, C. Bauer, I. Lingam, C. Meehan, et al. "Systems Biology Model of Cerebral Oxygen Delivery and Metabolism During Therapeutic Hypothermia: Application to the Piglet Model." In Advances in Experimental Medicine and Biology, 31–38. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-48238-1_5.
Анотація:
AbstractHypoxic ischaemic encephalopathy (HIE) is a significant cause of death and disability. Therapeutic hypothermia (TH) is the only available standard of treatment, but 45–55% of cases still result in death or neurodevelopmental disability following TH. This work has focussed on developing a new brain tissue physiology and biochemistry systems biology model that includes temperature effects, as well as a Bayesian framework for analysis of model parameter estimation. Through this, we can simulate the effects of temperature on brain tissue oxygen delivery and metabolism, as well as analyse clinical and experimental data to identify mechanisms to explain differing behaviour and outcome. Presented here is an application of the model to data from two piglets treated with TH following hypoxic-ischaemic injury showing different responses and outcome following treatment. We identify the main mechanism for this difference as the Q10 temperature coefficient for metabolic reactions, with the severely injured piglet having a median posterior value of 0.133 as opposed to the mild injury value of 5.48. This work demonstrates the use of systems biology models to investigate underlying mechanisms behind the varying response to hypothermic treatment.
9
Jung, Insung. "Quality Assurance in Online, Open, and Distance Education." In Handbook of Open, Distance and Digital Education, 1–16. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-0351-9_39-1.
Анотація:
AbstractOver the past few decades, online, open, and distance education (ODE) has enjoyed phenomenal growth across different regions, and with the spread of the COVID-19 virus, its use has adopted more quickly and widely at all levels of education in both developed and developing countries. There has also been a surge in trans-institutional online courses and programs. Despite this surge in widespread practice of ODE, an image problem that perceives ODE as a second-rate education, indicated by Daniel (Quality assurance and accreditation in distance education and e-learning: Models, policies, and research. Routledge, New York, 2011) a decade ago, still exists, meaning that there is a need for even stronger measures to ensure that ODE is as good as in-person education and that quality assurance (QA) systems are in place as it enters the mainstream of education.Applying QA to ODE processes and outcomes is a relatively new phenomenon. Drawing upon previous literature on quality and QA in ODE, including institutional case studies, this chapter examines various definitions of quality and QA in ODE practice, difficulties, and challenges presented by QA in ODE and the role of stakeholders in QA in ODE. It then discusses how different ODE institutions judge and assure the quality of their courses, programs, and services and what values and assumptions underpin such QA approaches. It finally draws conclusions about what still needs to be considered and actioned.
10
Jung, Insung. "Quality Assurance in Online, Open, and Distance Education." In Handbook of Open, Distance and Digital Education, 709–24. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-2080-6_39.
Анотація:
AbstractOver the past few decades, online, open, and distance education (ODE) has enjoyed phenomenal growth across different regions, and with the spread of the COVID-19 virus, its use has adopted more quickly and widely at all levels of education in both developed and developing countries. There has also been a surge in trans-institutional online courses and programs. Despite this surge in widespread practice of ODE, an image problem that perceives ODE as a second-rate education, indicated by Daniel (Quality assurance and accreditation in distance education and e-learning: Models, policies, and research. Routledge, New York, 2011) a decade ago, still exists, meaning that there is a need for even stronger measures to ensure that ODE is as good as in-person education and that quality assurance (QA) systems are in place as it enters the mainstream of education.Applying QA to ODE processes and outcomes is a relatively new phenomenon. Drawing upon previous literature on quality and QA in ODE, including institutional case studies, this chapter examines various definitions of quality and QA in ODE practice, difficulties, and challenges presented by QA in ODE and the role of stakeholders in QA in ODE. It then discusses how different ODE institutions judge and assure the quality of their courses, programs, and services and what values and assumptions underpin such QA approaches. It finally draws conclusions about what still needs to be considered and actioned.
Тези доповідей конференцій з теми "Mode qA0":
1
Barbosa, Fabio A., Mareli Rodigheri, Samuel Lennard, Ming-Jun Li, and Filipe M. Ferreira. "Single-Mode Coherent Transmission over Universal Fiber for Data Center Interconnects." In Optical Fiber Communication Conference. Washington, D.C.: Optica Publishing Group, 2024. http://dx.doi.org/10.1364/ofc.2024.w1h.3.
Анотація:
We demonstrate DP-16-QAM up to 42 Gbaud over 50 km of universal fiber, meeting current DCI requirements while allowing SDM upgrades. Multipath interference is analyzed experimentally using mandrel wrapping and matched by split-step simulation.
2
Qiao, Gang, Yu Yang, Zhaopeng Xu, Mingqing Zuo, Chengbin Long, Jiarui Zhang, Shangcheng Wang, et al. "130.6-Tb/s Self-homodyne Coherent Transmission over Weakly-Coupled FMF for Data Center Applications." In Optical Fiber Communication Conference. Washington, D.C.: Optica Publishing Group, 2024. http://dx.doi.org/10.1364/ofc.2024.th1b.6.
Анотація:
We experimentally demonstrate high-capacity MDM self-homodyne coherent transmission over 30-km weakly-coupled 10-mode fiber with specially designed multiple-ring-core profile, achieving a total throughput of 130.6 Tb/s with 9 information-bearing modes carrying 16-λ 120-GBaud PCS 64-QAM signals.
3
Kronenwett, M., A. S. Parkins, and H. J. Carmichael. "Photon Correlations in Two-Mode Cavity QED." In Quantum-Atom Optics Downunder. Washington, D.C.: OSA, 2007. http://dx.doi.org/10.1364/qao.2007.qme30.
4
Nakazawa, Masataka, Masato Yoshida, and Toshihiko Hirooka. "Mode Division Multiplexed Coherent Optical Transmission in Time Domain by Using Higher-order Hermite-Gaussian Pulses." In Optical Fiber Communication Conference. Washington, D.C.: Optica Publishing Group, 2024. http://dx.doi.org/10.1364/ofc.2024.w2b.19.
Анотація:
We propose a new mode-division-multiplexing (MDM) technique in time-domain using higher-order Hermite-Gaussian pulses. 32-QAM, 450-km MDM transmission was successfully demonstrated with HG0, HG1, HG2, and HG3 pulses, where the time-domain orthogonality was used for demultiplexing.
5
van den Hout, Menno, Giammarco Di Sciullo, Georg Rademacher, Ruben S. Luís, Benjamin J. Puttnam, Nicolas K. Fontaine, Roland Ryf, et al. "2736 Tb/s Transmission Over 1001 km of 15-Mode Fiber Using 16-QAM C-Band Signals." In Optical Fiber Communication Conference. Washington, D.C.: Optica Publishing Group, 2023. http://dx.doi.org/10.1364/ofc.2023.th4b.5.
Анотація:
We transmit 15×184×24.5 GBd PDM-16-QAM signals, spanning the full C-band, over 1001 km of 15-mode fiber. The resulting net data rate of 273.6 Tb/s is the highest reported in long-distance multi-mode fiber transmission.
6
Lett, Paul D., Vincent Boyer, Alberto Marino, Colin McCormick, Neil Corzo Trejo, Kristen Lemons, and Kevin Jones. "Multi-Spatial-Mode Squeezed Light from Four-Wave Mixing in Hot Rb Vapor." In Quantum-Atom Optics Downunder. Washington, D.C.: OSA, 2007. http://dx.doi.org/10.1364/qao.2007.qwc2.
7
Yan, Xiao, Qian Wang, and Kaiyu Qin. "Dual-Mode Blind Equalization Algorithm for High-Order QAM." In 2009 WRI International Conference on Communications and Mobile Computing (CMC). IEEE, 2009. http://dx.doi.org/10.1109/cmc.2009.34.
8
Chang, Hung-Bin, Shao-Yung Lee, Chih-Hsien Cheng, Hao-Chung Kuo, and Gong-Ru Lin. "Lensed MMF and SMF coupling of tri-mode VCSEL for 62-Gbps OOK and 164-Gbps OFDM transmission." In CLEO: Applications and Technology. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleo_at.2022.ath2l.7.
Анотація:
The non-tilting lensed-MMF/SMF coupling of tri-mode VCSEL with D factor of 14 GHz/mA0.5 is demonstrated to provide root-mean-square linewidth of 0.66/0.54 nm and mode-partition-noise of -145/-140 dBc/Hz for error-free 62-/58-Gbit/s NRZ-OOK and 164-/140-Gbit/ s 16-QAM-OFDM transmission.
9
Liu, Cao, Shizhu He, Kang Liu, and Jun Zhao. "Curriculum Learning for Natural Answer Generation." In Twenty-Seventh International Joint Conference on Artificial Intelligence {IJCAI-18}. California: International Joint Conferences on Artificial Intelligence Organization, 2018. http://dx.doi.org/10.24963/ijcai.2018/587.
Анотація:
By reason of being able to obtain natural language responses, natural answers are more favored in real-world Question Answering (QA) systems. Generative models learn to automatically generate natural answers from large-scale question answer pairs (QA-pairs). However, they are suffering from the uncontrollable and uneven quality of QA-pairs crawled from the Internet. To address this problem, we propose a curriculum learning based framework for natural answer generation (CL-NAG), which is able to take full advantage of the valuable learning data from a noisy and uneven-quality corpus. Specifically, we employ two practical measures to automatically measure the quality (complexity) of QA-pairs. Based on the measurements, CL-NAG firstly utilizes simple and low-quality QA-pairs to learn a basic model, and then gradually learns to produce better answers with richer contents and more complete syntaxes based on more complex and higher-quality QA-pairs. In this way, all valuable information in the noisy and uneven-quality corpus could be fully exploited. Experiments demonstrate that CL-NAG outperforms the state-of-the-arts, which increases 6.8% and 8.7% in the accuracy for simple and complex questions, respectively.
10
Neskorniuk, Vladislav, Andrea Carnio, Domenico Marsella, Sergei K. Turitsyn, Jaroslaw E. Prilepsky, and Vahid Aref. "Model-Based Deep Learning of Joint Probabilistic and Geometric Shaping for Optical Communication." In CLEO: Science and Innovations. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleo_si.2022.sw4e.5.
Анотація:
Autoencoder-based deep learning is applied to jointly optimize geometric and probabilistic constellation shaping for optical coherent communication. The optimized constellation shaping outperforms the 256 QAM Maxwell-Boltzmann probabilistic distribution with extra 0.05 bits/4D-symbol mutual information for 64 GBd transmission over 170 km SMF link.
Звіти організацій з теми "Mode qA0":
1
Li, Hang, Hosam Hegazy, Xiaorui Xue, Jiansong Zhang, and Yunfeng Chen. BIM Standards for Roads and Related Transportation Assets. Purdue University, 2023. http://dx.doi.org/10.5703/1288284317641.
Анотація:
With the industry foundation classes (IFC) building information modeling (BIM) standard (ISO 16739) being adopted by AASHTO as the national standard for modeling bridge and road infrastructure projects, there comes a great opportunity to upgrade the INDOT model development standard of roads and related assets to 2D+3D BIM. This upgrade complies with the national standard and creates a solid foundation for preserving accurate asset information for lifecycle data needs. This study reviewed the current modeling standards for drainage and pavement at different state DOTs and investigated the interoperability between state-of-the-art design modeling software and IFC. It was found that while the latest modeling software is capable of supporting interoperability with IFC, there remain gaps that must be addressed to achieve smooth interoperability for supporting life cycle asset data management. Specifically, the prevalent use of IfcBuildingElementProxy and IfcCourse led to a lack of differentiation in the use of IFC entities for the representations of different components, such as inlets, outfalls, conduits, and different concrete pavement layers. This, in turn, caused challenges in the quality assurance (QA) of IFC models and rendered the conventional model view definition (MVD)-based model checking insufficient. To address these gaps and push forward BIM for infrastructure at INDOT, efforts were made in this project to initially create model development instruction manuals that can serve as the foundation for further development and the eventual establish a consistent and comprehensive IFC-based modeling standards and protocols. In addition, automated object classification leveraging invariant signatures of architecture, engineering, and construction (AEC) objects was investigated. Correspondingly, a QA method and tool was developed to check and identify the different components in an IFC model. The developed tool achieved 91% accuracy on drainage and 100% accuracy in concrete pavement in its tested performance. These solutions aim to support the lifecycle management of INDOT transportation infrastructure projects using BIM and IFC.
2
Chepeliev, Maksym. The GTAP 10A Data Base with Agricultural Production Targeting Based on the Food and Agricultural Organization (FAO) Data. GTAP Research Memoranda, September 2020. http://dx.doi.org/10.21642/gtap.rm35.
Анотація:
This document describes a new source of inputs, based on FAO data, that allows us to estimate agricultural output targets on 133 regions of the GTAP 10A Data Base. This approach allows to overcome several limitations present under the current agricultural production targeting (APT) processing. First, a significant expansion in the regional coverage is achieved, as the number of regions undergoing APT more than doubles. Second, the detailed commodity classification of the FAO dataset allows for a more accurate mapping to the GTAP Data Base sectors. Third, a better commodity coverage in the FAO data prevents the issue of mapping a processed commodities to the corresponding primary sector. Finally, reliance on the FAO agricultural output data provides a better opportunity for further incorporation of the nutritional accounts to the GTAP Data Base, by lowering inconsistencies between GTAP and FAO agricultural accounting. Comparisons between OECD-based agricultural output (currently used in the GTAP Data Base) and FAO-derived estimates are provided in the document. FAO-based agricultural production targets are incorporated to the GTAP 10A Data Base build stream to produce a special release of the GTAP Data Base. JEL classification: C68, D57, D58, Q10, Q11. Keywords: Agricultural production targeting, GTAP Data Base, Computable general equilibrium.
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Mazari, Mehran, Siavash F. Aval, Siddharth M. Satani, David Corona, and Joshua Garrido. Developing Guidelines for Assessing the Effectiveness of Intelligent Compaction Technology. Mineta Transportation Institute, January 2021. http://dx.doi.org/10.31979/mti.2021.1923.
Анотація:
Many factors affect pavement compaction quality, which can vary. Such variability may result in an additional number of passes required, extended working hours, higher energy consumption, and negative environmental impacts. The use of Intelligent Compaction (IC) technology during construction can improve the quality and longevity of pavement structures while reducing risk for contractors and project owners alike. This study develops guidelines for the implementation of IC in the compaction of pavement layers as well as performing a preliminary life-cycle cost analysis (LCCA) of IC technology compared to the conventional compaction approach. The environmental impacts of the improved construction process were quantified based on limited data available from the case studies. The LCCA performed in this study consisted of different scenarios in which the number of operating hours was evaluated to estimate the cost efficiency of the intelligent compaction technique during construction. The analyses showed a reduction in energy consumption and the production of greenhouse gas (GHG) emissions with the use of intelligent compaction. The LCCA showed that the use of IC technology may reduce the construction and maintenance costs in addition to enhancing the quality control and quality assurance (QC/QA) process. However, a more comprehensive analysis is required to fully quantify the benefits and establish more accurate performance indicators. A draft version of the preliminary guidelines for implementation of IC technology and long-term monitoring of the performance of pavement layers compacted thereby is also included in this report.
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Lee, Wall, and Burch. L52333 NDE and Inspection Techniques Applied to Composite Wrap Repairs. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), June 2012. http://dx.doi.org/10.55274/r0010468.
Анотація:
The objective includes: Assess commercially available inspection methods to validate integrity of composite repair systems. Identify applicability to inspect composite overwrap and parent metal for both onshore and sub-sea pipelines (where information is available). Identify sources of data to include other users of composite materials(aerospace/aircraft, naval/ship repairs). Identify procedures and technologies to assess inspection effectiveness and provide a gap analysis. Interface with other PRCI projects on long-term testing of composite repairs and other joint industry projects on composite repairs to improve our understanding of long term durability of repairs. Identify global experience with composite repairs; not just North America. For general wall loss, radiography or electromagnetic techniques appear to be the best candidates. Standard radiography techniques can detect changes in wall thickness over a large area. Saturated low frequency systems, e.g. SLOFEC are good for a quick rapid scan of the area of interest. Pulsed eddy current, e.g. PEC, is also available for a general survey of the underlying substrate. For pinhole leaks, the electromagnetic techniques do not have sufficient resolution to detect defects of order 20 mm (0.8 in.) diameter and less. Standard radiography techniques can detect pinhole leaks down to diameters of 3 mm (0.12 in.) or less. Tangential radiography techniques are generally good for defect sizing but there are practical limitations with chord length (i.e. beam path through the pipe wall). Ultrasonic techniques could offer a potential solution but is currently limited due to the high attenuation of the composite repair material where through the repair inspection could only detect large diameter defects greater than 25 mm (1 in.) diameter on thin repairs less than 5 mm (0.2 in.). Detecting pin hole defects by applying the ultrasound along the axial direction of the substrate, effectively skipping the ultrasound under the repair, showed more promise. For delamination or debonding of the interface between the composite laminate and the steel substrate, laser shearography and microwave inspection appear to offer the best solution. Currently there is no single inspection technique that can be applied with confidence to the inspection of interfacial delaminations. Further developments are on-going to provide a solution to this challenging inspection problem. Acoustic emission is able to give an overall picture of the damage within the composite under live loads. It can be used as a QA tool to test the integrity of the repair. However, it is difficult to interpret the signals to gain any quantitative information about a particular defect.
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MR (Diffusion-Weighted Imaging (DWI) of the Apparent Diffusion Coefficient (ADC), Clinically Feasible Profile. Chair Michael Boss, Dariya Malyarenko, and Daniel Margolis. Radiological Society of North America (RSNA) / Quantitative Imaging Biomarkers Alliance (QIBA), December 2022. http://dx.doi.org/10.1148/qiba/20221215.
Анотація:
The goal of a QIBA Profile is to help achieve a useful level of performance for a given biomarker. The Claim (Section 2) describes the biomarker performance and is derived from the body of scientific literature meeting specific requirements, in particular test-retest studies. The Activities (Section 3) contribute to generating the biomarker. Requirements are placed on the Actors that participate in those activities as necessary to achieve the Claim. Assessment Procedures (Section 4) for evaluating specific requirements are defined as needed to ensure acceptable performance. Diffusion-Weighted Imaging (DWI) and the Apparent Diffusion Coefficient (ADC) are being used clinically as qualitative (DWI) and quantitative (ADC) indicators of disease presence, progression or response to treatment. Use of ADC as a robust quantitative biomarker with finite confidence intervals places additional requirements on Sites, Acquisition Devices and Protocols, Field Engineers, Scanner Operators (MR Technologists, Radiologists, Physicists and other Scientists), Image Analysts, Reconstruction Software and Image Analysis Tools. Additionally, due to the intrinsic dependence of measured ADC values on biophysical tissue properties, both the Profile Claims and the associated scan protocols (Section 3.6.2) are organ-specific. All of these are considered Actors involved in Activities of Acquisition Device Pre-delivery and Installation, Subject Handling, Image Data Acquisition, Reconstruction, Registration, ADC map generation, Quality Assurance (QA), Distribution, Analysis, and Interpretation. The requirements addressed in this Profile are focused on achieving ADC values with minimal systematic bias and measurement variability. DISCLAIMER: Technical performance of the MRI system can be assessed using a phantom having known diffusion properties, such as the QIBA DWI phantom. The clinical performance target is to achieve a 95% confidence interval for measurement of ADC with a variable precision depending on the organ being imaged and assuming adequate technical performance requirements are met. While in vivo DWI/ADC measurements have been performed throughout the human body, this Profile focused on four organ systems, namely brain, liver, prostate, and breast as having high clinical utilization of ADC with a sufficient level of statistical evidence to support the Profile Claims derived from the current peer-reviewed literature. In due time, new DWI technologies with proven greater performance levels, as well as more organ systems will be incorporated in future Profiles. This document is intended to help a variety of users: clinicians using this biomarker to aid patient management; imaging staff generating this biomarker; MRI system architects developing related products; purchasers of such products; and investigators designing clinical trials utilizing quantitative diffusion-based imaging endpoints. Note that this document only states requirements specific to DWI to achieve the claim, not requirements that pertain to clinical standard of care. Conforming to this Profile is secondary to proper patient care.
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Quality Assurance in HECA Colleges During the COVID-19 Pandemic: A Mixed Methods Analysis through the lens of QQI’s Core Criteria. Higher Education College's Assocation (HECA), May 2022. http://dx.doi.org/10.22375/hqf.tos22.
Анотація:
The National Forum’s 2020 Network and Discipline Fund was launched in November 2020 and focuses on Shared Solutions to Common Challenges. Its overarching aim is to support networks and discipline groups to work together to respond proactively to identified challenges in teaching and learning in higher education, including those that have come to light through the sudden move to online/remote teaching and learning. The National Forum’s 2020 Network and Discipline Fund, drawing on the Higher Education Colleges’ Association (HECA) members’ experience, provided the HECA Academic Quality Enhancement Forum(HAQEF) with opportunities to strengthen its networks and discipline group, support their efforts to enhance teaching and learning, and produce useful insights and resources into the application of quality assurance of blended and online learning. In the pandemic period, many colleges were forced to change from a face-to-face delivery model of education and training to an online format of delivery. This disruption meant that assumptions about and plans for how the courses were to be delivered and managed had to be rapidly reviewed. With government pronouncements advising all staff to work from home where possible, the majority of internal roles and processes of colleges were also affected. The quality assurance (QA) policies, processes and procedures that were developed by colleges had to be modified to reflect this change in circumstances. This document reports on the results of a mixed methods study of QA developments that came about as a result of the initial changes enforced by the pandemic and the move to working from home. It also looked at what was learned about the management of quality in this sector during this time. Data was collected by HAQEF via a survey of QA personnel from the member colleges of HECA and follow up interviews. The survey consisted of 11 questions, one for each Core Area of Quality, as set out in the QQI Core QA Guidelines (2016). The questions asked for reflections on each provider’s experience of managing this aspect of QA, what resources or instances of good practice they could share with practitioners and which stakeholders were involved in this adaptation. The interviews asked about the measures that were undertaken to adapt QA processes in the pandemic period and what challenges could be reported from this adaptation. The report is divided into 11 chapters, with each chapter centred on a discussion of one Core Area of Quality as set out in the QQI Core QA Guidelines. An overview of the core area is developed, followed by a commentary on common experiences of the group in this area. Most sections conclude with resources, volunteered by member colleges of HECA, that was rated as useful in how the cohort navigated the management of QA in this core area.
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Health Education Materials for the Workplace: Tools. Population Council, 2017. http://dx.doi.org/10.31899/sbsr2017.1007.
Анотація:
Companies can derive many benefits from educating workers on health. Yet workplaces in many lower income countries have a need for easy-to-access, on-demand health education materials. The Evidence Project/Meridian in partnership with Bayer has developed a set of health education materials for these industrial and agricultural workplaces. The materials cover important health issues facing women and men workers: - Family Planning - Engaged Fathers and Health - Healthy Timing and Spacing of Pregnancy - Menstrual Hygiene - Handwashing These materials are designed to be printed at the workplace on desktop printers, making the materials easy to access and available on demand. They are available in English, Bengali (approved by the Ministry of Health), and Arabic. The materials, in color and black and white (to save on printing costs), come in three types: - Mini-Posters (MP), to be posted in public areas - Handouts (HO), for workers to take home and containing a bit more information - Supplemental materials (QA) to reinforce learning. Each workplace can determine how best to use these materials. The Implementation Guide gives workplace health staff and managers ideas for fitting the materials into their health promotion activities. There is also a User’s Guide for Brands/Retailers, NGOs and other interested parties explaining how the materials can be used in their workplace programs in global supply chains.