Acceder

Bibliografías temáticas / Partial CSIT / Artículos de revistas

Siga este enlace para ver otros tipos de publicaciones sobre el tema: Partial CSIT.

Artículos de revistas sobre el tema "Partial CSIT"

Autor: Grafiati

Publicado: 25 de mayo de 2024

Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros

Elija tipo de fuente:

Consulte los 50 mejores artículos de revistas para su investigación sobre el tema "Partial CSIT".

Junto a cada fuente en la lista de referencias hay un botón "Agregar a la bibliografía". Pulsa este botón, y generaremos automáticamente la referencia bibliográfica para la obra elegida en el estilo de cita que necesites: APA, MLA, Harvard, Vancouver, Chicago, etc.

También puede descargar el texto completo de la publicación académica en formato pdf y leer en línea su resumen siempre que esté disponible en los metadatos.

Explore artículos de revistas sobre una amplia variedad de disciplinas y organice su bibliografía correctamente.

1

Kramer, Gerhard. "Information Rates for Channels with Fading, Side Information and Adaptive Codewords". Entropy 25, n.º 5 (27 de abril de 2023): 728. http://dx.doi.org/10.3390/e25050728.

Texto completo

Resumen

Generalized mutual information (GMI) is used to compute achievable rates for fading channels with various types of channel state information at the transmitter (CSIT) and receiver (CSIR). The GMI is based on variations of auxiliary channel models with additive white Gaussian noise (AWGN) and circularly-symmetric complex Gaussian inputs. One variation uses reverse channel models with minimum mean square error (MMSE) estimates that give the largest rates but are challenging to optimize. A second variation uses forward channel models with linear MMSE estimates that are easier to optimize. Both model classes are applied to channels where the receiver is unaware of the CSIT and for which adaptive codewords achieve capacity. The forward model inputs are chosen as linear functions of the adaptive codeword’s entries to simplify the analysis. For scalar channels, the maximum GMI is then achieved by a conventional codebook, where the amplitude and phase of each channel symbol are modified based on the CSIT. The GMI increases by partitioning the channel output alphabet and using a different auxiliary model for each partition subset. The partitioning also helps to determine the capacity scaling at high and low signal-to-noise ratios. A class of power control policies is described for partial CSIR, including a MMSE policy for full CSIT. Several examples of fading channels with AWGN illustrate the theory, focusing on on-off fading and Rayleigh fading. The capacity results generalize to block fading channels with in-block feedback, including capacity expressions in terms of mutual and directed information.

Los estilos APA, Harvard, Vancouver, ISO, etc.

2

Kim, T. T. y M. Skoglund. "Diversity–Multiplexing Tradeoff in MIMO Channels With Partial CSIT". IEEE Transactions on Information Theory 53, n.º 8 (agosto de 2007): 2743–59. http://dx.doi.org/10.1109/tit.2007.901171.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

3

Dutta, Biswajit. "Full-Diversity Achieving Precoding for Asymmetric MIMO Using Partial CSIT". IEEE Transactions on Communications 61, n.º 3 (marzo de 2013): 1051–58. http://dx.doi.org/10.1109/tcomm.2013.012313.120353.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

4

Du, Weimin, Zujun Liu y Fan Li. "Interference Neutralization With Partial CSIT for Full-Duplex Cellular Networks". IEEE Access 7 (2019): 49177–90. http://dx.doi.org/10.1109/access.2019.2910601.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

5

Wang, Yanmin, Wei Feng, Limin Xiao, Yifei Zhao y Shidong Zhou. "Coordinated Multi-Cell Transmission for Distributed Antenna Systems with Partial CSIT". IEEE Communications Letters 16, n.º 7 (julio de 2012): 1044–47. http://dx.doi.org/10.1109/lcomm.2012.050912.120383.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

6

Yong Peng, K. Josiam y D. Rajan. "Diversity Multiplexing Tradeoff in MIMO Frequency Selective Channels with Partial CSIT". IEEE Communications Letters 12, n.º 6 (junio de 2008): 408–10. http://dx.doi.org/10.1109/lcomm.2008.080228.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

7

Li, Qian, Kwok H. Li y Kah C. Teh. "Diversity-Multiplexing Tradeoff of Symmetric MIMO Interference Channels with Partial CSIT". IEEE Transactions on Wireless Communications 10, n.º 7 (julio de 2011): 2325–33. http://dx.doi.org/10.1109/twc.2011.041311.101629.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

8

Maleki, Mehdi y Hamid Reza Bahrami. "Adaptive Space Modulation With Partial CSIT in Spatially Correlated Fading Channels". IEEE Transactions on Vehicular Technology 63, n.º 7 (septiembre de 2014): 3184–95. http://dx.doi.org/10.1109/tvt.2014.2300102.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

9

Mai, Vien V., Juyeop Kim, Sang-Woon Jeon, Sang Won Choi, Beomjoo Seo y Won-Yong Shin. "Degrees of Freedom of Millimeter Wave Full-Duplex Systems With Partial CSIT". IEEE Communications Letters 20, n.º 5 (mayo de 2016): 1042–45. http://dx.doi.org/10.1109/lcomm.2016.2536606.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

10

Piovano, Enrico y Bruno Clerckx. "Optimal DoF Region of the $K$ -User MISO BC With Partial CSIT". IEEE Communications Letters 21, n.º 11 (noviembre de 2017): 2368–71. http://dx.doi.org/10.1109/lcomm.2017.2724553.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

11

Su, Yinjie, Chen He y Lingge Jiang. "Dynamic Decode-and-Forward Relaying with Partial CSIT and Optimal Time Allocation". Chinese Journal of Electronics 24, n.º 1 (1 de enero de 2015): 193–98. http://dx.doi.org/10.1049/cje.2015.01.032.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

12

JIN, Sai, Deyou ZHANG y Li PING. "A Two-Way Relay Scheme for Multi-User MIMO Systems with Partial CSIT". IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E99.A, n.º 2 (2016): 678–81. http://dx.doi.org/10.1587/transfun.e99.a.678.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

13

Li, Qian, Kwok H. Li y Kah C. Teh. "Diversity-Multiplexing Tradeoff of Fading Interference Channels With Source Cooperation and Partial CSIT". IEEE Transactions on Information Theory 57, n.º 5 (mayo de 2011): 2781–804. http://dx.doi.org/10.1109/tit.2011.2120190.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

14

Wu, Jianjian, Xinyu Liu, Chanzi Liu, Chi-Tsun Cheng y Qingfeng Zhou. "Fairness-Oriented Transmission Schemes for Multiuser MISO Broadcast Channels". Wireless Communications and Mobile Computing 2022 (18 de noviembre de 2022): 1–10. http://dx.doi.org/10.1155/2022/8172300.

Texto completo

Resumen

With the increasing number of Internet of Things (IoT), Industry 4.0 (I4.0), and mobile devices, it can be expected that base stations will have to serve more and more clients with a limited number of antennas. For their broadcast channels, nonorthogonal multiple access (NOMA) and blind interference alignment (BIA) are two efficient and commonly adopted transmission schemes. This paper conducts a comparison study on these techniques on a 3-user 2 × 1 multiple-input single-output (MISO) broadcast channel with a limited number of transmit antennas. Specifically, space-time block coding based NOMA (STBC-NOMA) and NOMA-assisted beamforming (NOMA-BF) are compared with BIA. Both perfect and imperfect successive interference cancellation (SIC) have been considered for NOMA-based schemes, and the theoretical achievable rates of all schemes have been derived. Furthermore, with a given fairness constraint among end users, the power allocation (PA) problems have been solved for cases when accurate channel state information is available at the transmitter (CSIT) as well as when only path loss information is available. Numerical results show the following: (1) none of the schemes under this study can always outperform the others under different SNR regions. (2) With imperfect SIC, NOMA-BF, and STBC-NOMA both suffer from a significant performance loss under a high SNR condition. (3) Fairness PA with only path loss information provides similar performance as that with perfect CSIT, thus partial CSIT is adequate for system or scheme designs in practice.

Los estilos APA, Harvard, Vancouver, ISO, etc.

15

Ekbatani, Siavash, Farzad Etemadi y Hamid Jafarkhani. "Outage Behavior of Slow Fading Channels With Power Control Using Partial and Erroneous CSIT". IEEE Transactions on Information Theory 56, n.º 12 (diciembre de 2010): 6097–102. http://dx.doi.org/10.1109/tit.2010.2078991.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

16

Piovano, Enrico, Hamdi Joudeh y Bruno Clerckx. "Generalized Degrees of Freedom of the Symmetric Cache-Aided MISO Broadcast Channel With Partial CSIT". IEEE Transactions on Information Theory 65, n.º 9 (septiembre de 2019): 5799–815. http://dx.doi.org/10.1109/tit.2019.2914204.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

17

Zhang, Yan-Yu. "Intrinsic Robustness of MISO Visible Light Communications: Partial CSIT Can be as Useful as Perfect One". IEEE Transactions on Communications 67, n.º 2 (febrero de 2019): 1297–312. http://dx.doi.org/10.1109/tcomm.2018.2874988.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

18

Mao, Yijie y Bruno Clerckx. "Beyond Dirty Paper Coding for Multi-Antenna Broadcast Channel With Partial CSIT: A Rate-Splitting Approach". IEEE Transactions on Communications 68, n.º 11 (noviembre de 2020): 6775–91. http://dx.doi.org/10.1109/tcomm.2020.3014153.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

19

Joudeh, Hamdi y Bruno Clerckx. "Sum-Rate Maximization for Linearly Precoded Downlink Multiuser MISO Systems With Partial CSIT: A Rate-Splitting Approach". IEEE Transactions on Communications 64, n.º 11 (noviembre de 2016): 4847–61. http://dx.doi.org/10.1109/tcomm.2016.2603991.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

20

Davoodi, Arash Gholami y Syed Jafar. "Aligned Image Sets and the Generalized Degrees of Freedom of Symmetric MIMO Interference Channel With Partial CSIT". IEEE Transactions on Information Theory 65, n.º 1 (enero de 2019): 406–17. http://dx.doi.org/10.1109/tit.2018.2873126.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

21

Joudeh, Hamdi y Bruno Clerckx. "On the Separability of Parallel MISO Broadcast Channels Under Partial CSIT: A Degrees of Freedom Region Perspective". IEEE Transactions on Information Theory 66, n.º 7 (julio de 2020): 4513–29. http://dx.doi.org/10.1109/tit.2019.2962136.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

22

Joudeh, Hamdi y Bruno Clerckx. "Corrections to “On the Separability of Parallel MISO Broadcast Channels Under Partial CSIT: A Degrees of Freedom Region Perspective”". IEEE Transactions on Information Theory 66, n.º 10 (octubre de 2020): 6605. http://dx.doi.org/10.1109/tit.2020.3015638.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

23

Chiu, Eddy, Vincent K. N. Lau, Shunqing Zhang y Bao S. M. Mok. "Precoder Design for Multi-Antenna Partial Decode-and-Forward (PDF) Cooperative Systems with Statistical CSIT and MMSE-SIC Receivers". IEEE Transactions on Wireless Communications 11, n.º 4 (abril de 2012): 1343–49. http://dx.doi.org/10.1109/twc.2012.031212.110774.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

24

Barkovska, Olesia, Dmytro Mohylevskyi, Yuliia Ivanenko y Dmytro Rosinskiy. "WAYS TO DETERMINE THE RANGE OF KEYWORDS IN A FREQUENCY DICTIONARY FOR TEXT CLASSIFICATION". Computer systems and information technologies, n.º 1 (30 de marzo de 2023): 14–20. http://dx.doi.org/10.31891/csit-2023-1-2.

Texto completo

Resumen

The paper is devoted to the actual problem of classifying textual documents of the collection by characteristic features, which is used for classifying news, reviews, determining the emotional tone of the text, as well as for forming catalogs of scientific, academic and research works. The paper proposes an approach for determining the significant words of a document for their further use as a feature vector in the classification process. In the course of the work, the author's keywords were identified, a partial dictionary was built, and the correlation between the author's keywords and the list of ordered words of the frequency dictionary based on the TF method, which also includes the author’s keywords, was analyzed. The determination of the range and percentage of significant words allows for further classification of scientific and research papers when forming thematic catalogs even in the absence of a list of author's keywords that can be used for classification. The results show that the use of the entire input range of frequency dictionary words is redundant and leads to a longer classification time.

Los estilos APA, Harvard, Vancouver, ISO, etc.

25

Ma, Yongtao, Linzhong Song, Yu Zhao y Kaihua Liu. "A tight outer bound of the degrees of freedom for the MIMO interference channel with the delayed CSIT and partial local feedback". Journal of the Franklin Institute 352, n.º 1 (enero de 2015): 291–310. http://dx.doi.org/10.1016/j.jfranklin.2014.10.026.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

26

Okhrimenko, Tetiana, Serhii Dorozhynskyi y Bohdan Horbakha. "ANALYSIS OF QUANTUM SECURE DIRECT COMMUNICATION PROTOCOLS". Computer systems and information technologies, n.º 1 (30 de marzo de 2023): 62–67. http://dx.doi.org/10.31891/csit-2023-1-8.

Texto completo

Resumen

The development of modern computer technologies endangers the confidentiality of information, which is usually ensured by traditional cryptographic means. This circumstance forces us to look for new methods of protection. In view of modern trends, quantum cryptography methods can become such alternatives, which allow solving a number of important cryptographic problems, for which the impossibility of solving using only classical (that is, non-quantum) communication has been proven. Quantum cryptography is a branch of quantum informatics that studies methods of protecting information by using quantum carriers. The possibility of such protection is ensured by the fundamental laws of quantum mechanics. One of the promising directions of quantum cryptography is Quantum Secure Direct Communication (QSDC) that offers secure communication without any shared key. A characteristic feature of this method is the absence of cryptographic transformations, accordingly, there is no key distribution problem. The purpose of this work is a general overview of quantum cryptography protocols, finding their weak points for further development and improvement, as well as identifying vulnerabilities to different attacks. The article analyzes new methods and protocols, as well as presents their advantages and disadvantages. Based on partial generalizations of theoretical provisions and practical achievements in the field of quantum cryptography, a generalized classification was developed. By comparing various factors of the protocols, and their resistance to certain cyberattacks, we have the opportunity to identify several problems in this field and expand the possibilities for choosing appropriate methods for building modern quantum information protection systems. In accordance with this, conclusions were presented regarding the use of protocols and increasing the level of their effectiveness.

Los estilos APA, Harvard, Vancouver, ISO, etc.

27

BARKOVSKA, OLESIA, ANTON HAVRASHENKO, VLADYSLAV KHOLIEV y OLENA SEVOSTIANOVA. "AUTOMATIC TEXT TRANSLATION SYSTEM FOR ARTIFICIAL LLANGUAGES". Computer systems and information technologies, n.º 3 (14 de abril de 2022): 21–30. http://dx.doi.org/10.31891/csit-2021-5-3.

Texto completo

Resumen

The growing number and variety of artificial languages leads to the need and relevance of creating automatic dictionaries for their translation in order to facilitate human communication. Such languages include languages where vocabulary, phonetics, and grammar have been specifically designed to achieve specific goals and to communicate with a group of people by interests or place of residence. These languages can be distributed among people of certain professions or among neighboring nations. Examples are slang and surzhik. The common for them is that there is a basic language (literary), the intersection in spelling and meaning of words and phrases with which is quite large. The main goal of the project is to create a system of automatic translation of words and texts from / into arbitrary languages, including hybrid, artificial and slang ones. The proposed model shows the interaction and partial interdependence of the creation and adjustment modules and the translation module of the dictionary, which is explained by tacking the approach of reverse propagation of the translation error. To perform experiments and analyze the performance of the proposed approach to the organization of automatic translation of texts from and into arbitrary language, a software application was developed, which includes a subprogram of initial word processing for dictionary organization, one for creating a working dictionary and one for two-way improvement of created dictionary by the inclusion of new texts in order to improve the quality of translation, including the search for word phrases, idiom, and translation for them, the subprogram of dividing the dictionary into sub-dictionaries with a small percentage of text, the subprogram of the translator itself. To test and analyze the results of the proposed generalized model, three types of source texts were used: literary poetry translation, literary prose translation, literal prose translation. The results of the experiments showed that the proposed approach provides a high level of translation (up to 98,8%) in similar languages (between such languages as Ukrainian-Russian, or Ukrainian - Ukrainian-Russian surzhik wih equal word order in the sentence), especially with a literally translated source text. It has become known that the use of artistic texts to generate dictionaries is possible, but not very effective.

Los estilos APA, Harvard, Vancouver, ISO, etc.

28

Gholami Davoodi, Arash y Syed Jafar. "Degrees of Freedom Region of the (M, N₁, N₂) MIMO Broadcast Channel With Partial CSIT: An Application of Sum-Set Inequalities Based on Aligned Image Sets". IEEE Transactions on Information Theory 66, n.º 10 (octubre de 2020): 6256–79. http://dx.doi.org/10.1109/tit.2020.3009614.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

29

Molnárová, Orsolya, Stanislav Habr, Esther de Prado, Jaroslav Čapek, Ondřej Ekrt, Gergely Németh, Přemysl Málek y Pavel Lejček. "Microstructural Evolution of a 3003 Based Aluminium Alloy during the CSET Process". Materials 14, n.º 19 (2 de octubre de 2021): 5770. http://dx.doi.org/10.3390/ma14195770.

Texto completo

Resumen

A new severe plastic deformation technique, known as the complex shearing of extruded tube (CSET), was applied to a 3003 based model aluminium alloy. This technique, consisting of a combination of extrusion and two consecutive Equal Chanel Angular Pressing (ECAP) passes accompanied with concurrent torsional straining, is capable to produce a fine-grained tubular sample directly from a bulk metallic cylinder in one forming operation. In the present paper, the microstructural development of the alloy during partial processes of CSET was studied in detail using light microscopy, electron backscatter diffraction, and transmission electron microscopy. It was found that CSET technique refines the grain size down to 0.4 µm and, consequently, increases the microhardness from the initial value of 40 HV to the final value of 120 HV. The contributions of partial processes of CSET to the total strain were estimated.

Los estilos APA, Harvard, Vancouver, ISO, etc.

30

Akai, F., S. Nakagawa, T. Fukawa, H. Yugami y M. Taneda. "Symptomatic Cavernous Internal Carotid Artery Aneurysms Treated with Detachable Coils". Interventional Neuroradiology 9, n.º 1_suppl (mayo de 2003): 89–94. http://dx.doi.org/10.1177/15910199030090s111.

Texto completo

Resumen

We reviewed the cranial nerve dysfunctions of eight patients with symptomatic cavernous internal carotid (CSIC) aneurysms treated by endovascular intraaneurysmal occlusion. Aneurysms were classified into three types according to their location and direction of growth. Anterior type aneurysms, which involved anterior bend of CSIC represented third nerve dysfunction. Posterior type aneurysms, which located posterior bend of CSIC preferred to affect sixth nerve function. CSIC aneurysms that extended over the both bends had total ophthalmoplegia. All patients responded to endovascular treatment, though partial resolution was recorded in the case of upward gaze or lateral gaze impairment. Endovascular treatment with detachable coils offers an excellent alternative with acceptable risks of morbidity.

Los estilos APA, Harvard, Vancouver, ISO, etc.

31

Blair, Joanne, Andrew McKay, Colin Ridyard, Keith Thornborough, Emma Bedson, Matthew Peak, Mohammed Didi et al. "Continuous subcutaneous insulin infusion versus multiple daily injections in children and young people at diagnosis of type 1 diabetes: the SCIPI RCT". Health Technology Assessment 22, n.º 42 (agosto de 2018): 1–112. http://dx.doi.org/10.3310/hta22420.

Texto completo

Resumen

Background The risk of developing long-term complications of type 1 diabetes (T1D) is related to glycaemic control and is reduced by the use of intensive insulin treatment regimens: multiple daily injections (MDI) (≥ 4) and continuous subcutaneous insulin infusion (CSII). Despite a lack of evidence that the more expensive treatment with CSII is superior to MDI, both treatments are used widely within the NHS. Objectives (1) To compare glycaemic control during treatment with CSII and MDI and (2) to determine safety and cost-effectiveness of the treatment, and quality of life (QoL) of the patients. Design A pragmatic, open-label randomised controlled trial with an internal pilot and 12-month follow-up with 1 : 1 web-based block randomisation stratified by age and centre. Setting Fifteen diabetes clinics in hospitals in England and Wales. Participants Patients aged 7 months to 15 years. Interventions Continuous subsutaneous insulin infusion or MDI initiated within 14 days of diagnosis of T1D. Data sources Data were collected at baseline and at 3, 6, 9 and 12 months using paper forms and were entered centrally. Data from glucometers and CSII were downloaded. The Health Utilities Index Mark 2 was completed at each visit and the Pediatric Quality of Life Inventory (PedsQL, diabetes module) was completed at 6 and 12 months. Costs were estimated from hospital patient administration system data. Outcomes The primary outcome was glycosylated haemoglobin (HbA1c) concentration at 12 months. The secondary outcomes were (1) HbA1c concentrations of < 48 mmol/mol, (2) severe hypoglycaemia, (3) diabetic ketoacidosis (DKA), (4) T1D- or treatment-related adverse events (AEs), (5) change in body mass index and height standard deviation score, (6) insulin requirements, (7) QoL and (8) partial remission rate. The economic outcome was the incremental cost per quality-adjusted life-year (QALY) gained. Results A total of 293 participants, with a median age of 9.8 years (minimum 0.7 years, maximum 16 years), were randomised (CSII, n = 149; MDI, n = 144) between May 2011 and January 2015. Primary outcome data were available for 97% of participants (CSII, n = 143; MDI, n = 142). At 12 months, age-adjusted least mean squares HbA1c concentrations were comparable between groups: CSII, 60.9 mmol/mol [95% confidence interval (CI) 58.5 to 63.3 mmol/mol]; MDI, 58.5 mmol/mol (95% CI 56.1 to 60.9 mmol/mol); and the difference of CSII – MDI, 2.4 mmol/mol (95% CI –0.4 to 5.3 mmol/mol). For HbA1c concentrations of < 48 mmol/mol (CSII, 22/143 participants; MDI, 29/142 participants), the relative risk was 0.75 (95% CI 0.46 to 1.25), and for partial remission rates (CSII, 21/86 participants; MDI, 21/64), the relative risk was 0.74 (95% CI 0.45 to 1.24). The incidences of severe hypoglycaemia (CSII, 6/144; MDI, 2/149 participants) and DKA (CSII, 2/144 participants; MDI, 0/149 participants) were low. In total, 68 AEs (14 serious) were reported during CSII treatment and 25 AEs (eight serious) were reported during MDI treatment. Growth outcomes did not differ. The reported insulin use was higher with CSII (mean difference 0.1 unit/kg/day, 95% CI 0.0 to 0.2 unit/kg/day; p = 0.01). QoL was slightly higher for those randomised to CSII. From a NHS perspective, CSII was more expensive than MDI mean total cost (£1863, 95% CI £1620 to £2137) with no additional QALY gains (–0.006 QALYs, 95% CI –0.031 to 0.018 QALYs). Limitations Generalisability beyond 12 months is uncertain. Conclusions No clinical benefit of CSII over MDI was identified. CSII is not a cost-effective treatment in patients representative of the study population. Future work Longer-term follow-up is required to determine if clinical outcomes diverge after 1 year. A qualitative exploration of patient and professional experiences of MDI and CSII should be considered. Trial registration Current Controlled Trials ISRCTN29255275 and EudraCT 2010-023792-25. Funding This project was funded by the National Institute for Health Research (NIHR) Health Technology Assessment programme and will be published in full in Health Technology Assessment; Vol. 22, No. 42. See the NIHR Journals Library website for further project information. The cost of insulin pumps and consumables supplied by F. Hoffman-La Roche AG (Basel, Switzerland) for the purpose of the study were subject to a 25% discount on standard NHS costs.

Los estilos APA, Harvard, Vancouver, ISO, etc.

32

Liu, Li y Luo. "Effect of Carboxymethylation and Phosphorylation on the Properties of Polysaccharides from Sepia esculenta Ink: Antioxidation and Anticoagulation in Vitro". Marine Drugs 17, n.º 11 (1 de noviembre de 2019): 626. http://dx.doi.org/10.3390/md17110626.

Texto completo

Resumen

To investigate the effect of carboxymethylation and phosphorylation modification on Sepia esculenta ink polysaccharide (SIP) properties, this study prepared carboxymethyl SIP (CSIP) with the chloracetic acid method, and phosphorylated SIP (PSIP) with the sodium trimetaphosphate (STMP)/sodium tripolyphosphate (STPP) method, on the basis of an orthogonal experiment. The in vitro antioxidant and anticoagulant activities of the derivatives were determined by assessing the scavenging capacity of the 1,1-diphenyl-2-picrylhydrazyl (DPPH) and hydroxyl radicals, which activated the partial thromboplastin time (APTT), prothrombin time (PT), and thrombin time (TT). The results showed that SIP was modified successfully to be CSIP and PSIP, and degrees of substitution (DSs) of the two products were 0.9913 and 0.0828, respectively. Phosphorylation efficiently improved the antioxidant property of SIP, and the IC50 values of PSIP on DPPH and hydroxyl radicals decreased by 63.25% and 13.77%, respectively. But carboxymethylation reduced antioxidant activity of the native polysaccharide, IC50 values of CSIP on the DPPH and hydroxyl radicals increased by 16.74% and 6.89%, respectively. SIP significantly prolonged the APTT, PT, and TT in a dose-dependent fashion, suggesting that SIP played an anticoagulant action through intrinsic, extrinsic, and common coagulation pathways. CSIP and PSIP both possessed a stronger anticoagulant capacity than SIP via the same pathways; moreover, CSIP was observed to be more effective in prolonging APTT and PT than PSIP.

Los estilos APA, Harvard, Vancouver, ISO, etc.

33

YuSheng, Kong y Masud Ibrahim. "Service innovation, service delivery and customer satisfaction and loyalty in the banking sector of Ghana". International Journal of Bank Marketing 37, n.º 5 (1 de julio de 2019): 1215–33. http://dx.doi.org/10.1108/ijbm-06-2018-0142.

Texto completo

Resumen

Purpose The concept of innovation is gaining ground steadily in the context of an increasingly competitive and highly volatile banking sector. The purpose of this paper is to find out the role of service innovation (SI) in the relationship between service delivery (SERVD), customer satisfaction (CSAT) and loyalty in the banking sector of Ghana. Design/methodology/approach Drawing from banking and marketing literature, a conceptual framework was developed and tested using data from 450 sampled customers of commercial banks in Ghana. The data were analyzed using partial least squares structural equation modeling. Findings The findings indicate that SI has direct influence on SERVD and CSAT. Again the findings revealed a positive relationship between SERVD, CSAT and bank customer loyalty. Research limitations/implications This study offers theoretical support for the adoption of innovative techniques in service provision and delivery. Originality/value This paper provides an initial study into innovation management in financial services context in an emerging economy.

Los estilos APA, Harvard, Vancouver, ISO, etc.

34

BENATTIA, MOHAMED ELARBI y KACEM BELGHABA. "INVESTIGATION OF CONFORMABLE DOUBLE SHEHU TRANSFORM FOR SOLVING SOME FRACTIONAL DIFFERENTIAL PARTIAL EQUATIONS". Journal of Science and Arts 23, n.º 2 (30 de junio de 2023): 355–66. http://dx.doi.org/10.46939/j.sci.arts-23.2-a03.

Texto completo

Resumen

In this paper, we generalize the concept of single conformable Sehu transformation (CSHT) to double conformable transformation (CDFSHT). Moreover, we are able to prove some theorems and properties related to this work. We apply the double conformable Sehu transform to solve the initial and boundary problems of linear and (non)homogenous conformable fractional partial differential equations (PDEs). The validity and the applicability of the proposed technique are shown by three numerical examples. Mathematica software is used for Euclidean division of polynomials and drawing graphs.

Los estilos APA, Harvard, Vancouver, ISO, etc.

35

Huangfu, Huihui, Qinwen Yu, Peiwu Shi, Qunhong Shen, Zhaoyang Zhang, Zheng Chen, Chuan Pu et al. "The Impacts of Regional Regulatory Policies on the Prevention and Control of Chronic Diseases in China: A Mediation Analysis". Healthcare 9, n.º 8 (18 de agosto de 2021): 1058. http://dx.doi.org/10.3390/healthcare9081058.

Texto completo

Resumen

Regional regulatory policies (RPs) are a major factor in the prevention and control of chronic diseases (PCCDs) through the implementation of various measures. This study aimed to explore the impacts of RPs on PCCDs, with a focus on the mediating roles of community service. The soundness of the regulatory mechanism (SORM) was used to measure the soundness of RPs based on 1095 policy documents (updated as of 2015). Coverage provided by community service institutions (CSIs) and community health centres (CHCs) was used to represent community service coverage derived from the China Statistical Yearbook (2015), while the number of chronic diseases (NCDs) was used to measure the effects of PCCDs based on data taken from the 2015 China Health and Retirement Longitudinal Study survey. To assess the relationship between SORM, NCDs and community service, a negative binomial regression model and mediation analysis with bootstrapping were conducted. Results revealed that there was a negative correlation between SORM and NCDs. CSIs had a major effect on the relationship between RPs and PCCDs, while CHCs had a partial mediating effect. RPs can effectively prevent and control chronic diseases. Increased effort should also be aimed at strengthening the roles of CSIs and CHCs.

Los estilos APA, Harvard, Vancouver, ISO, etc.

36

Zaharie, A., M. L. Tintisan, A. C. Siomin, D. L. Manea y M. L. Pleşa. "Cement materials obtained by partial replacement of cement powder with brick powder". IOP Conference Series: Materials Science and Engineering 1242, n.º 1 (1 de abril de 2022): 012043. http://dx.doi.org/10.1088/1757-899x/1242/1/012043.

Texto completo

Resumen

Abstract The current evolution of the construction materials manufacturing industry requires an increased focus on the quantities of raw materials used, this can be adjusted by obtaining new sustainable materials with low energy and raw material consumption. The negative impact of the exploitation of natural resources is felt both from the point of view of the population’s health and of the economic branch. Urban development and the progress of society have led to an uncontrolled increase in the amount of waste resulting from construction and demolition. Over the years it has been shown that waste can be reintroduced into the circuit for reuse. Waste reuse positively influences the regeneration of the environment and the improvement of economic resources. The waste used in this study is the brick powder type waste, this waste being part of the category of recyclable waste resulting from building, rehabilitation modernization and demolition of different constructions This article studies the mechanical characteristics at 3, 7 and 28 days, of a series of CSIV type millet recipes with brick powder waste. Brick powder can be used in building materials without depleting the consumption of raw materials and without degrading the environment.

Los estilos APA, Harvard, Vancouver, ISO, etc.

37

Kim, Seong-Hwan, Joo-Youl Huh, Myung-Soo Kim y Jong-Sang Kim. "Effects of Oxygen Partial Pressure on Oxidation Behavior of CMnSi TRIP Steel in an Oxidation-Reduction Scheme". Corrosion Science and Technology 16, n.º 1 (28 de febrero de 2017): 15–22. http://dx.doi.org/10.14773/cst.2017.16.1.15.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

38

Budiman, Firmansyah Nur y Ali Muhammad Rushdi. "Dimensional analysis of partial discharge initiated by a metallic particle adhering to the spacer surface in a gas-insulated system". Communications in Science and Technology 6, n.º 2 (31 de diciembre de 2021): 91–100. http://dx.doi.org/10.21924/cst.6.2.2021.556.

Texto completo

Resumen

Partial discharges (PDs) constitute important phenomena in a Gas-Insulated System (GIS) that warrant recognition (and, subsequently, mitigation) as they are obvious symptoms of system degradation. This paper proposes the application of dimensional analysis, based on Buckingham pi theorem, for characterizing PDs provoked by the presence of metallic particles adhering to the spacer surface in a GIS employing SF6 (Sulphur hexafluoride). The ultimate goal of the analysis is to formulate the relationships that express three PD indicator quantities, namely current, charge, and energy, in terms of six independent quantities that collectively influence these indicators. These six quantities (henceforth referred to as the influencing, determining or affecting variables) include the level of applied voltage, the SF6 pressure, the length and position of the particle on the spacer, the duration of voltage application, and the gap between electrodes. To compute the pertinent dimensionless products, we implement three computational methods based on matrix operations. These three methods produce exactly the same dimensionless products, which are subsequently used for constructing the models depicting the relationships between each of the three PD dependent quantities and the common six determining variables. The models derived provide partial quantitative information and facilitate qualitative reasoning about the considered phenomenon.

Los estilos APA, Harvard, Vancouver, ISO, etc.

39

Tomotani, Barbara M., Rodrigo B. Salvador, Amandine J. M. Sabadel, Colin M. Miskelly, Julie C. S. Brown, Josette Delgado, Patrick Boussès, Yves Cherel, Susan M. Waugh y Sarah J. Bury. "Extreme bill dimorphism leads to different but overlapping isotopic niches and similar trophic positions in sexes of the charismatic extinct huia". Oecologia 198, n.º 1 (29 de noviembre de 2021): 67–77. http://dx.doi.org/10.1007/s00442-021-05082-8.

Texto completo

Resumen

AbstractThe New Zealand huia (Heteralocha acutirostris) had the most extreme bill sexual dimorphism among modern birds. Given the quick extinction of the species, the cause of the dimorphism could only be hypothesised to reflect different trophic niches and reduce male/female competition. We tested that hypothesis by combining museum specimens, geometric morphometrics, and isotopic analyses. We used geometric morphometrics to describe bill shape; measured bulk (δ15Nbulk) and (δ13Cbulk) values from feather as proxies of the birds’ foraging habitat and diet; and compared compound-specific stable isotopes analyses (CSIA) of nitrogen in amino acids (δ15NAA) in male–female pairs to estimate their trophic position. Sexes had significantly different, but overlapping feather δ15Nbulk and δ13Cbulk values, but δ15NAA indicated identical trophic positions and δ15Nbulk was not related to bill shape. Trophic position was less variable among females, consistent with a specialised foraging behaviour and, thus, supporting a partial male/female foraging segregation.

Los estilos APA, Harvard, Vancouver, ISO, etc.

40

Findlay, Izac, Dilana Staudt, Padraic Kearney, Holly McEwen, Ryan Duchatel, Evangeline Jackson, Tyrone Beitaki et al. "CSIG-10. PHARMACO-PHOSPHO-PROTEO-GENOMICS OF PEDIATRIC HIGH-GRADE GLIOMAS – A PILOT STUDY". Neuro-Oncology 24, Supplement_7 (1 de noviembre de 2022): vii40—vii41. http://dx.doi.org/10.1093/neuonc/noac209.159.

Texto completo

Resumen

Abstract Pediatric high-grade gliomas (pHGG) are the leading cause of cancer-related death in children and young adults. Current treatment strategies are centered on maximal safe resection, followed by radiotherapy, and interrogation of the tumor genome to identify targetable mutations. Unfortunately, we are yet to see an improvement in patient outcomes with a median overall survival remaining 15-months. To improve patient outcomes, we have begun to characterize the genome, proteome, and phosphoproteome of 168 pHGGs to better understand the functional consequences of their somatic alterations as well as their influence of the tumor microenvironment. Employing a novel ‘pharmaco-phospho-proteo-genomics’ pipeline, we have analyzed pHGG cell lines and tumor tissue specimens at diagnosis, relapse (partial resection congenital glioblastoma), and autopsy. Genomic profiling was conducted utilizing the 523-gene TruSight Oncology 500 (TSO500) next-generation sequencing panel. Simultaneously, tumor proteomes and phosphoproteomes were characterized using our high-throughput global phospho-proteomic profiling technique termed pHASED (phospho Heavy-labelled-spiketide FAIMS StEpped-CV DDA). High-fidelity tumor proteomic and phospho-proteomic data were identified and compared to normal control brain samples. Across 40 pHGG samples, we identified 290 unique somatic alterations with a high predicted impact severity and quantified 7,345 unique proteins and 3,327 phosphoproteins. Gene panel sequencing of a critical pediatric glioblastoma patient sample identified 18 somatic alterations, eight of which had a high predicted impact severity, however, none were targetable. Conversely, phosphoproteomic profiling identified enriched MAPK and PRKCB signaling, relative to normal brain tissues, thereby encouraging the use of the TGA/FDA approved therapies trametinib (MAPKs) and enzastaurin (PRKCB). In vitro investigations confirmed the utility of these treatment approaches and in vivo patient derives xenograft mouse models for this sample are under investigation. This pilot study provides critical data to support the benefit of interrogating the genome, proteome, and phospho-proteome of these devastating tumours to aid in the selection/development of effective treatment strategies.

Los estilos APA, Harvard, Vancouver, ISO, etc.

41

Shchurova, Elena N., Oxana G. Prudnikova, Anastasiia A. Kachesova, Marat S. Saifutdinov y Marina S. Tertyshnaya. "Improvement of Functional State of Patients after Spinal Cord Injury During Epidural Electrical Stimulation: Prospective Study". Bulletin of Rehabilitation Medicine 22, n.º 6 (26 de febrero de 2024): 28–41. http://dx.doi.org/10.38025/2078-1962-2023-22-6-28-41.

Texto completo

Resumen

the lack of convincing evidence of a therapeutic effect. AIM. To evaluate the effect of complex rehabilitation using EPS and activation of the proprioceptive apparatus on the indicators of the functional state of patients with long-term consequences of spinal cord injury with partial spinal cord injury. MATERIALS AND METHODS. A prospective study was conducted with the participation of 29 patients with long-term consequences of spinal cord injury with partial spinal cord injury. The catamnesis of the disease was 3.7 ± 0.5 years. Comprehensive rehabilitation included epidural electrical stimulation by implantable electrode and activation of the proprioceptive apparatus. The neurological (ASIA scale) and functional (CSIM III scale) status of the patient was analyzed. Motor function was evaluated using 10-meter Walk test; M-responses of limb muscles — using electromyography, temperature and pain sensitivity — using esthesiometry. RESULTS. An increase in muscle strength and M-response of the muscles of the extremities, normalization of the motor deficit index, reduction of the walking test time, increase in movement speed and the patient’s independence index were revealed. There is an improvement in temperature and pain sensitivity at the level of damage and in the dermatomes located distally. The effect decreases in dermatomes far from the level of the electrode installation; but with increase in the number of courses the effect increases. DISCUSSION. The results obtained indicate that this rehabilitation complex, including UES, has a positive effect on the functioning of both the motor and sensitive spheres. CONCLUSION. Application of EES and activation of the proprioceptive apparatus improves the functional condition of sensorimotor sphere in the long-term consequences of spinal cord injury with partial spinal cord damage. Repeated rehabilitation courses have cumulative effect.

Los estilos APA, Harvard, Vancouver, ISO, etc.

42

Vereskun, Aleksei V. y Aleksander S. Kotosonov. "Improvement of the Unified State System for Emergency Situations Prevention and Response Activities on the Elimination of Emergencies in the Conditions of Full and (or) Partial Restriction of the Electric Energy Consumption Mode". Технологии гражданской безопасности 19, n.º 2 (2022): 81–85. http://dx.doi.org/10.54234/cst.19968493.2022.19.2.72.15.81.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

43

Alkhushayni, Suboh, Du’a Al-zaleq, Luwis Andradi y Patrick Flynn. "The Application of Differing Machine Learning Algorithms and Their Related Performance in Detecting Skin Cancers and Melanomas". Journal of Skin Cancer 2022 (4 de mayo de 2022): 1–11. http://dx.doi.org/10.1155/2022/2839162.

Texto completo

Resumen

Skin cancer, and its less common form melanoma, is a disease affecting a wide variety of people. Since it is usually detected initially by visual inspection, it makes for a good candidate for the application of machine learning. With early detection being key to good outcomes, any method that can enhance the diagnostic accuracy of dermatologists and oncologists is of significant interest. When comparing different existing implementations of machine learning against public datasets and several we seek to create, we attempted to create a more accurate model that can be readily adapted to use in clinical settings. We tested combinations of models, including convolutional neural networks (CNNs), and various layers of data manipulation, such as the application of Gaussian functions and trimming of images to improve accuracy. We also created more traditional data models, including support vector classification, K-nearest neighbor, Naïve Bayes, random forest, and gradient boosting algorithms, and compared them to the CNN-based models we had created. Results had indicated that CNN-based algorithms significantly outperformed other data models we had created. Partial results of this work were presented at the CSET Presentations for Research Month at the Minnesota State University, Mankato.

Los estilos APA, Harvard, Vancouver, ISO, etc.

44

Takada, Y., E. Murphy, P. Pil, C. Chen, M. H. Ginsberg y M. E. Hemler. "Molecular cloning and expression of the cDNA for alpha 3 subunit of human alpha 3 beta 1 (VLA-3), an integrin receptor for fibronectin, laminin, and collagen." Journal of Cell Biology 115, n.º 1 (1 de octubre de 1991): 257–66. http://dx.doi.org/10.1083/jcb.115.1.257.

Texto completo

Resumen

alpha 3 beta 1 (VLA-3), a member of the integrin family of cell adhesion receptors, may function as a receptor for fibronectin, laminin, and collagen. A partial cDNA clone (2.4 kb) for the human alpha 3 subunit was selected from an endothelial cell lambda gt11 cDNA library by specific antibody screening. Several overlapping cDNA clones were subsequently obtained, of a total length of 4.6 kb from various cDNA libraries. The reconstructed alpha 3 cDNA was expressed on the surface of chinese hamster ovary cells as detected by an alpha 3-specific mAb after transfection, suggesting that the cDNA is authentic. Within this sequence was an open reading frame, encoding for 1,051 amino acids, including a signal peptide of 32 residues, a long extracellular domain (959 residues), a transmembrane domain (28 residues), and a short cytoplasmic segment (32 residues). Overall, the alpha 3 amino acid sequence was 25-37% similar to the other integrin alpha subunits that are cleaved, with most similarity to the alpha 6 sequence (37%), and less similarity to those alpha subunits that have I domains (15-20%, excluding the I domain sequence itself). Features most like those in other alpha subunits are (a) the positions of 18/19 cysteine residues, (b) three potential metal binding domains of the general structure DX(D/N)X(D/N)GXXD, and (c) the predicted transmembrane domain. The mass of alpha 3 calculated from its amino acid sequence is 113,505. The human alpha 3 sequence was 89% identical to hamster galactoprotein b3, and 70% similar to the chicken CSAT antigen band 2 protein partial sequence, suggesting that these two polypeptides are homologues of human alpha 3.

Los estilos APA, Harvard, Vancouver, ISO, etc.

45

Gao, Xiangdong, Wuzhong Li, Yiming Yang, Kaigui Yin y Shihao Zhou. "Multiple Influences of Paleogeography, Sequence Stratigraphy, and Fold Structure on Coalbed Methane Accumulation in the Lopingian (Late Permian) of Junlian Coalfield, SW China". Geofluids 2021 (14 de octubre de 2021): 1–17. http://dx.doi.org/10.1155/2021/3401273.

Texto completo

Resumen

Junlian coalfield is one of the main targets for coalbed methane (CBM) exploration and development in the southwest China. Based on field geological survey, core observation, gas content statistics, coal maceral composition, vitrinite reflectance ( R O ), proximate analysis and trace element test, lithological types, lithofacies, sedimentary environment, and structural analysis, this research established the sequence stratigraphy frame, revealed the plane distribution characteristics of sedimentary facies, and defined CBM accumulation mode. The results show that six rock types were identified and further subdivided into twenty lithofacies types. Four types of sedimentary systems such as alluvial plains, delta, lagoon-tidal flat, and carbonate platform were summarized according to their combination characteristics. Additionally, 12-14 fourth-order sequences and three third-order sequences CSI, CSII, and CSIII were divided, and a sequence stratigraphic framework of the Lopingian coal-bearing series was established. Among them, the features of third-order sequence CSIII paleogeography from west to east are alluvial plains, deltas, lagoon-tidal flats, and limited carbonate platforms. Thick coal seams are mainly developed in the sedimentary environment of tidal flats, delta plains, and floodplains behind banks. Closely related to coal seam thickness, gas contents of Lopingian coal seams are generally higher than 8 m3/t, except the low level in northwest and partial denudation areas. CBM accumulation is significantly controlled by the fold structure, and the hydraulic plugging effect makes the syncline core favorable for CBM accumulation. Furthermore, favorable geostress conditions enable the secondary anticline to become a favorable area for CBM accumulation when the sealing conditions are better. This research will provide a theoretical guide for the exploration and development of CBM in the study area.

Los estilos APA, Harvard, Vancouver, ISO, etc.

46

Poillon, William N., Bak C. Kim y Oswaldo Castro. "Intracellular Hemoglobin S Polymerization and the Clinical Severity of Sickle Cell Anemia". Blood 91, n.º 5 (1 de marzo de 1998): 1777–83. http://dx.doi.org/10.1182/blood.v91.5.1777.

Texto completo

Resumen

Abstract Recent work has enabled us to quantitate the four variables (2,3-DPG concentration, pHi, non-S hemoglobin composition, and O2 saturation) that modulate the equilibrium solubility (csat) of Hb S inside sickle erythrocytes (SS RBCs). Using measured values of mean corpuscular hemoglobin concentration (MCHC), 2,3-DPG concentration, and %Hb (F+A2), along with estimates of pHiand the Δcsat due to partial oxygenation of SS RBCs in the microcirculation, we calculated the mean polymer fraction (fp) in erythrocytes from 46 SS homozygotes. Values of fp derived from the conservation of mass equation ranged from 0.30 to 0.59. MCHC and %Hb F were major determinants of the magnitude of fp; 2,3-DPG concentration and pHialso contributed, but to a lesser extent. A clinical severity score (CSS) was assigned to each patient based on mean hospitalization rate. There was a weak, but statistically significant, negative correlation between fp and steady state hematocrit (P = .017), but none between fp and whole blood hemoglobin concentration (P = .218). Although there was no correlation between fp and mean number of hospitalization days per year, patients with the greatest number of admissions and hospitalization days were found only among those who had an fp > 0.45. All five patients who died during the follow-up period (median, 7 years; range, 3 to 10 years) had fp values ≥0.48. However, patients with few admissions, low hospitalization days, and long survivals occurred at all fp levels. These results suggest that the clinical course of homozygous SS disease cannot be predicted by mean fpcalculations, which assume a homogeneous distribution of the five variables that modulate intraerythrocytic polymerization. A heterogeneous distribution is more likely; so the amount of polymerized Hb S could vary considerably among cell populations. Factors such as membrane abnormalities and endothelial cell interactions may also contribute to clinical severity.

Los estilos APA, Harvard, Vancouver, ISO, etc.

47

Poillon, William N., Bak C. Kim y Oswaldo Castro. "Intracellular Hemoglobin S Polymerization and the Clinical Severity of Sickle Cell Anemia". Blood 91, n.º 5 (1 de marzo de 1998): 1777–83. http://dx.doi.org/10.1182/blood.v91.5.1777.1777_1777_1783.

Texto completo

Resumen

Recent work has enabled us to quantitate the four variables (2,3-DPG concentration, pHi, non-S hemoglobin composition, and O2 saturation) that modulate the equilibrium solubility (csat) of Hb S inside sickle erythrocytes (SS RBCs). Using measured values of mean corpuscular hemoglobin concentration (MCHC), 2,3-DPG concentration, and %Hb (F+A2), along with estimates of pHiand the Δcsat due to partial oxygenation of SS RBCs in the microcirculation, we calculated the mean polymer fraction (fp) in erythrocytes from 46 SS homozygotes. Values of fp derived from the conservation of mass equation ranged from 0.30 to 0.59. MCHC and %Hb F were major determinants of the magnitude of fp; 2,3-DPG concentration and pHialso contributed, but to a lesser extent. A clinical severity score (CSS) was assigned to each patient based on mean hospitalization rate. There was a weak, but statistically significant, negative correlation between fp and steady state hematocrit (P = .017), but none between fp and whole blood hemoglobin concentration (P = .218). Although there was no correlation between fp and mean number of hospitalization days per year, patients with the greatest number of admissions and hospitalization days were found only among those who had an fp > 0.45. All five patients who died during the follow-up period (median, 7 years; range, 3 to 10 years) had fp values ≥0.48. However, patients with few admissions, low hospitalization days, and long survivals occurred at all fp levels. These results suggest that the clinical course of homozygous SS disease cannot be predicted by mean fpcalculations, which assume a homogeneous distribution of the five variables that modulate intraerythrocytic polymerization. A heterogeneous distribution is more likely; so the amount of polymerized Hb S could vary considerably among cell populations. Factors such as membrane abnormalities and endothelial cell interactions may also contribute to clinical severity.

Los estilos APA, Harvard, Vancouver, ISO, etc.

48

Li, Huaimin, Donghang Li, Ke Xu, Weixing Cao, Xiaoping Jiang y Jun Ni. "Monitoring of Nitrogen Indices in Wheat Leaves Based on the Integration of Spectral and Canopy Structure Information". Agronomy 12, n.º 4 (29 de marzo de 2022): 833. http://dx.doi.org/10.3390/agronomy12040833.

Texto completo

Resumen

Canopy spectral reflectance can indicate both crop nutrient and canopy structural information. Differences in canopy structure can affect spectral reflectance. However, a non-imaging spectrometer cannot distinguish such differences while monitoring crop nutrients, because the results are likely to be influenced by the canopy structure. In addition, nitrogen application rate is one of the main factors influencing the canopy structure of crops. Strong correlations exist between indices of canopy structure and leaf nitrogen, and thus, these can be used to compensate for the spectral monitoring of nitrogen content in wheat leaves. In this study, canopy structural indices (CSI) such as wheat coverage, height, and textural features were obtained based on the RGB and height images obtained by the RGB-D camera. Moreover, canopy spectral reflectance was obtained by an ASD hyperspectral spectrometer, based on which two vegetation indices—ratio vegetation index (RVI) and angular insensitivity vegetation index (AIVI)—were constructed. With the vegetation indices and CSIs as input parameters, a model was established to predict the leaf nitrogen content (LNC) and leaf nitrogen accumulation (LNA) of wheat based on partial least squares (PLS) and random forest (RF) regression algorithms. The results showed that the RF model with RVI and CSI as inputs had the highest prediction accuracy for LNA, the coefficient of determination (R2) reached 0.79, and the root mean square error (RMSE) was 1.54 g/m2. The vegetation indices and coverage were relatively important features in the model. In addition, the PLS model with AIVI and CSI as input parameters had the highest prediction accuracy for LNC, with an R2 of 0.78 and an RMSE of 0.35%, among the vegetation indices. In addition, parts of both the textural and height features were important. The results suggested that PLS and RF regression algorithms can effectively integrate spectral and canopy structural information, and canopy structural information effectively supplement spectral information by improving the prediction accuracy of vegetation indices for LNA and LNC.

Los estilos APA, Harvard, Vancouver, ISO, etc.

49

Riyanto, Eko, Muslikh Muslikh y Bambang Supriyadi. "PERILAKU SAMBUNGAN SAYAP MENERUS BALOK PROFIL I DENGAN KOLOM TABUNG BAJA AKIBAT BEBAN SIKLIK". INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur 13, n.º 2 (5 de diciembre de 2017): 76–88. http://dx.doi.org/10.21831/inersia.v13i2.17172.

Texto completo

Resumen

ABSTRACTUsing Concrete-Filled Steel Tube (CSFT) as a column component provides many advantages over steel columns. Steel tube serve as reinforcement as well as formwork for concrete filler increases the strength column. The lack of experience and complexity of the beam-column connection system becomes an obstacle to use the CFST as a column. In addition, strength and stiffness of the connection system should be sufficient to endure the earthquake loads. in this research, continuous joint of beam-CFST and continuous joint of beam-column steel tube without concrete filler (BKS-K). Load cycle of specimen refer to ACI 374.1-05. The test results showed the average load of 23,85 kN on BKS-K increased to 26.05 kN on BKS-T. Elastic stiffness (Ke) at BKS-K of 0,531 kN/mm increased to 0,531 kN/mm on BKS-T. BKS-T also has a larger hysteretic loop than BKS-K. BKS-K and BKS-T adequate the strong column weak beam criteria with partial ductility. Keywords: CFST, beam-column joint, cyclic test. ABSTRAKPenggunaan kolom tabung baja dengan isian beton memberikan banyak keuntungan dibandingkan dengan kolom biasa. Adanya isian beton pada tabung baja, kuat tekan terhadap gaya aksial meningkat. Selain itu sambungan harus memiliki kekuatan menahan beban gempa. Kajian ini bertujuan mengetahui perilaku histeristis, kekuatan, kekakuan dan pola keruntuhan dalam menahan beban siklik. Kajian ini dibuat benda uji sambungan sayap menerus balok-kolom tabung baja dengan isian beton (BKS-T) dan sambungan sayap menerus balok-kolom tabung baja tanpa isian beton (BKS-K). Benda uji dibebani dengan siklus beban yang mengacu pada ACI 374.1-05. Hasil pengujian menunjukkan beban maksimum rata-rata sebesar 23,85 kN pada BKS-K meningkat menjadi 26,05 kN pada BKS-T. Kekakuan elastis (Ke) pada BKS-K sebesar 0,531 kN/mm meningkat menjadi 0,737 kN/mm pada BKS-T. Benda uji BKS-T juga memiliki hysteretic loop yang lebih besar dari BKS-K. Benda uji BKS-K dan BKS-T mengalami kegagalan yang memenuhi kriteria strong column weak beam dengan daktilitas parsial.Kata kunci: CFST, sambungan balok-kolom, uji siklik.

Los estilos APA, Harvard, Vancouver, ISO, etc.

50

Broullón, Daniel, Fiz F. Pérez, Antón Velo, Mario Hoppema, Are Olsen, Taro Takahashi, Robert M. Key, Toste Tanhua, J. Magdalena Santana-Casiano y Alex Kozyr. "A global monthly climatology of oceanic total dissolved inorganic carbon: a neural network approach". Earth System Science Data 12, n.º 3 (5 de agosto de 2020): 1725–43. http://dx.doi.org/10.5194/essd-12-1725-2020.

Texto completo

Resumen

Abstract. Anthropogenic emissions of CO2 to the atmosphere have modified the carbon cycle for more than 2 centuries. As the ocean stores most of the carbon on our planet, there is an important task in unraveling the natural and anthropogenic processes that drive the carbon cycle at different spatial and temporal scales. We contribute to this by designing a global monthly climatology of total dissolved inorganic carbon (TCO2), which offers a robust basis in carbon cycle modeling but also for other studies related to this cycle. A feedforward neural network (dubbed NNGv2LDEO) was configured to extract from the Global Ocean Data Analysis Project version 2.2019 (GLODAPv2.2019) and the Lamont–Doherty Earth Observatory (LDEO) datasets the relations between TCO2 and a set of variables related to the former's variability. The global root mean square error (RMSE) of mapping TCO2 is relatively low for the two datasets (GLODAPv2.2019: 7.2 µmol kg−1; LDEO: 11.4 µmol kg−1) and also for independent data, suggesting that the network does not overfit possible errors in data. The ability of NNGv2LDEO to capture the monthly variability of TCO2 was testified through the good reproduction of the seasonal cycle in 10 time series stations spread over different regions of the ocean (RMSE: 3.6 to 13.2 µmol kg−1). The climatology was obtained by passing through NNGv2LDEO the monthly climatological fields of temperature, salinity, and oxygen from the World Ocean Atlas 2013 and phosphate, nitrate, and silicate computed from a neural network fed with the previous fields. The resolution is 1∘×1∘ in the horizontal, 102 depth levels (0–5500 m), and monthly (0–1500 m) to annual (1550–5500 m) temporal resolution, and it is centered around the year 1995. The uncertainty of the climatology is low when compared with climatological values derived from measured TCO2 in the largest time series stations. Furthermore, a computed climatology of partial pressure of CO2 (pCO2) from a previous climatology of total alkalinity and the present one of TCO2 supports the robustness of this product through the good correlation with a widely used pCO2 climatology (Landschützer et al., 2017). Our TCO2 climatology is distributed through the data repository of the Spanish National Research Council (CSIC; https://doi.org/10.20350/digitalCSIC/10551, Broullón et al., 2020).

Los estilos APA, Harvard, Vancouver, ISO, etc.

Ofrecemos descuentos en todos los planes premium para autores cuyas obras están incluidas en selecciones literarias temáticas. ¡Contáctenos para obtener un código promocional único!