Data Reduction and Regression Using Principal Component Analysis in Qualitative Spatial Reasoning and Health Informatics

Sabharwal, Chaman L.; Anjum, Bushra

doi:10.17562/pb-53-3

Cited by 11 publications

(4 citation statements)

References 11 publications

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“…The characteristics of Fm, A/Ci, and ostiolar opening were removed from the PCA, considering factor scores < 0.20, in both axes, indicating low representativeness. The use of PCA allows observation of qualitative standards without loss of data information from the difference and similarities represented by two components (dimensions), denoted as PC 1 and PC 2 (Sabharwal & Anjum, 2016). From this multivariate analysis it was identified which characteristics evaluated presented the highest constitution weight in each dimension (axis), considering the loads of factor scores.…”

Section: Resultsmentioning

confidence: 99%

CHICKEN MANURE AND LUMINOUS AVAILABILITY INFLUENCE GAS EXCHANGE AND PHOTOCHEMICAL PROCESSES IN Alibertia edulis (Rich.) A. Rich SEEDLINGS

et al. 2020

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Information on the physiological responses of native plants from the Brazilian Cerrado regarding the use of chicken manure and luminosities are important for their silvicultural management. Thus, aimed to evaluate the effect of chicken manure and luminous availability on the photosynthetic metabolism of Alibertia edulis (Rich) A. Rich. The experiment was carried out in pots, testing five doses of chicken manure -CM (0.00, 2.08, 4.16, 6.24 and 8.32 g kg -1 ) incorporated at Dystroferric Red Latosol, and two luminous environmental (full sun and 50% shaded). The higher CO2 assimilation rate, stomatal conductance and carboxylation efficiency of Rubisco occurred in seedlings grown in full sun. The seedlings showed higher photochemical indicators in photosystem II in the shaded and with addition of 8.32 g kg -1 of CM. The intercellular CO2 concentration in leaves was lower with addition of 5.55 g kg -1 of CM. The leaves presented larger stomatal dimensions under shaded. The cultivation of A. edulis in full sun and the addition of about 4.16 g kg -1 of CM favored greater stomatal regulation and CO2 assimilation.

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Section: Resultsmentioning

confidence: 99%

CHICKEN MANURE AND LUMINOUS AVAILABILITY INFLUENCE GAS EXCHANGE AND PHOTOCHEMICAL PROCESSES IN Alibertia edulis (Rich.) A. Rich SEEDLINGS

et al. 2020

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“…67,68 The SVD is related to the principal component analysis. 69,70 The measurements for the comparisons are corrected for delays in connectors, as well as simulated corrections based on measured cable parameters, in order to transform the data into equivalent 50% triggered TIC time delays. One can obtain root-mean-square deviations (RMSD) for each method from a global SVD fit over the 1.5-to 25-m cable range as is shown in Table 2.…”

Section: Delay Measurementmentioning

confidence: 99%

Design, implementation, and qualification of high-performance time and frequency reference for the MeerKAT telescope

Burger

Siebrits

Gamatham

et al. 2022

J. Astron. Telesc. Instrum. Syst.

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The details of the MeerKAT radio telescope's time and frequency reference subsystem that enables sampling via low-jitter, low-drift microwave clock signals, and absolute timing (≤5 ns accurate) are discussed. The subsystem's microwave and pulse per second transmission parts are now fully qualified and commissioned for the ultra high frequency (UHF) and L-bands and also provide for a 100-MHz interface and timing interfaces for S-band receivers that were installed. The subsystem includes a cable measurement system called the Karoo array timing system (KATS). Performance and differences on different bands and seasonal drift of the cable delay measurement of KATS are reported. A time scale called the Karoo Telescope Time (KTT) (which is estimated from tracking a few atomic clocks via new software) and the issuing of timing bulletins to users have been largely implemented and verified. Absolute timing calibration and linkage of KTT to the global positioning system time scale and to different UTC(k) realizations of the Coordinated Universal Time (UTC) instances are described. The subsystem uniquely enables high-fidelity sampling and stable tied array configuration. The latter configuration enables timing and transient science over time spans of 5 to 10 years. Simultaneous subarraying is supported. The backend is unique for radio telescopes in terms of being very deterministic as far as timing is concerned.

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“…The advantage of a principal component analysis (PCA) is that it is able to reduce dimensionality and still preserve most of the variation in data [77]. Thus, the PCA is applied to the household survey dataset to consolidate the different dimensions of flood impacts with financial implications into one score.…”

Section: Principal Component Analysismentioning

confidence: 99%

Recovering from Financial Implications of Flood Impacts—The Role of Risk Transfer in the West African Context

Wagner

Thiam²,

Dossoumou

et al. 2022

Sustainability

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In many West African river basins, households regularly experience floods and the associated impacts. In the absence of widely accessible formal risk transfer mechanisms (e.g., insurance), households often have to cope with financial impacts. Only a few studies have explored the financial effects of floods on agriculture-dependent households in the region and the role formal and informal risk transfer plays in their mitigation. This study addresses this gap, explores flood impacts with financial implications for households, and researches the existing strategies to mitigate them. Moreover, it aims to better understand how different measures influence the recovery process. The study draws on primary data from a household survey (n = 744) in the Lower Mono River basin, combined with stakeholder workshops and semi-structured interviews, and applies a generalized linear model to the survey data. The results reveal four flood impact types with financial implications: agricultural, material, health, and trade. Moreover, a shortened recovery time is significantly associated with assistance from savings groups and cooperatives—groups originally not formed to help during floods. In light of the severe and frequent flood impacts, effective and publicly accepted adaptation measures are needed to enable favorable conditions for creating sustainable and accessible risk transfer mechanisms.

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Data Reduction and Regression Using Principal Component Analysis in Qualitative Spatial Reasoning and Health Informatics

Cited by 11 publications

References 11 publications

CHICKEN MANURE AND LUMINOUS AVAILABILITY INFLUENCE GAS EXCHANGE AND PHOTOCHEMICAL PROCESSES IN Alibertia edulis (Rich.) A. Rich SEEDLINGS

CHICKEN MANURE AND LUMINOUS AVAILABILITY INFLUENCE GAS EXCHANGE AND PHOTOCHEMICAL PROCESSES IN Alibertia edulis (Rich.) A. Rich SEEDLINGS

Design, implementation, and qualification of high-performance time and frequency reference for the MeerKAT telescope

Recovering from Financial Implications of Flood Impacts—The Role of Risk Transfer in the West African Context

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