Etiologies and Clinical Characteristics of Patients with Macular Hole: A 8-Years Single-Center Retrospective Study

Background: To investigate the etiologies and clinical characteristics of full-thickness macular hole (FTMH) patients at Shanxi eye hospital of North China. Methods: Patients diagnosed with FTMH and treated with surgery from 2012 to 2020 were included, and the etiologies and clinical features of different types of MHs were analysed in the 8-years cross sectional retrospective study. Multivariate correlation analysis was used to predict the related factors affecting baseline vision.Results: A total of 752 cases (776 eyes) were analysed. The top three causes of MH were idiopathic (IMH, 64.4%), myopic (MMH, 21.1%) and traumatic (TMH, 3.7%). Among these three causes’ groups, there were significant differences in sex distribution, age, and baseline BCVA. Female was predominated in IMH and MMH, while it was the opposite in TMH. The age of onset in IMH was older than MMH and TMH. The baseline Logarithm of the Minimum Angle of Resolution (logMAR) best-corrected visual acuity (BCVA) in IMH (Z=8.9, p<0.001) and Others group (Z=4.0, p<0.001) were significantly better than in MMH. In IMH, female patients had younger age, shorter axial length, and poorer baseline BCVA than male, while in MMH there were no significant differences between sexes. Multivariate correlation analysis showed that the smaller hole diameter of IMH, MMH without retinal detachment and younger age in TMH, may resulted in better baseline BCVA. Conclusions: The most common etiologies in MH were idiopathic, myopic and traumatic, which contributed to the different clinical features. Female was more common in IMH and MMH, and patients with MMH were 6.5 years earlier than IMH in onset. Therefore earlier monitoring fundus for female and people with high myopia is helpful for early detection and timely treatment.

Multivariate Correlation Analysis of the Electroconductive Textiles Obtained Using Functionalization by Radio-Frequency Oxygen Plasma Treatments

This paper presents a study concerning the preliminary treatments in radiofrequency (RF)oxygen (O2) plasma used to obtain a hydrophilic effect on raw cotton fabrics followed by electroconductive thin film deposition to obtain electroconductive textile surfaces. In addition, this study presents a multivariate correlation analysis of experimental parameters. The treatment using RF plasma O2 aimed to increase the hydrophilic character of the raw fabric and adherence of paste-based polymeric on polyvinyl alcohol (PVA) matrix and nickel (Ni), silver (Ag) or copper (Cu) microparticles. The purpose of the research was to develop electroconductive textiles for flexible electrodes, smart materials using a clean technology such as radiofrequency (RF) plasma O2 to obtain a hydrophilic surface with zero wastewater and reduced chemicals and carbon footprint. To achieve the foreseen results, we used advanced functionalization technologies such as RF plasma O2, followed by scraping a thin film of conductive paste-based Ni, Ag or Cu microparticles, and multivariate correlation methods to observe the dependence between parameters involved (dependent and independent variables). Overall, the fabrics treated in plasma with O2 using a kHz or MHz generator and power 100–200 W present an excellent hydrophilic character obtained in 3 min. After RF O2 plasma functionalization, a thin film based on polymeric matrix PVA and Ni microparticles have been deposited on the fabric surface to obtain electroconductive materials.

3.3. Predicative modeling of current liquidity of a commercial bank based on multivariate correlation analysis

Несмотря на то, что базовые экономические модели показывают свою жизнеспособность, прогрессивные информационные технологии требуют все более тонких инструментов воздействия на процессы регулирования денежных потоков в банковском секторе. Одним из таких инструментов традиционно выступает управление ликвидностью коммерческого банка. Вместе с тем, процессы управления ликвидностью сопровождаются кризисными явлениями и внутрибанковскими слабыми звеньями в коммуникациях и технологиях.В искомом ключе авторы предлагают методический подход по синхронизации целевых ориентиров и релевантных показателей деятельности банка на основе метода парных корреляций. Проанализированы факторы, влияющие на ликвидность современного банка с точки зрения тактических преференций. Обосновано заключение по применению политики рационального управления ликвидностью, включающей осмотрительное целеполагание, финансовое планирование и рисковую сдержанность. The article presents a study of dependence of short-term bank`s liquidity on a number of economic indicators based on correlation and regression modeling. It is established that the dynamics of current liquidity of banks is significantly influenced by such parameters as non-performant loans, short-term liabilities and equity. The proposed approach can be used by commercial banks` analysts in the development of models for assessing the financial condition.

The Factors Determining Voter Turnouts in Presidential Elections in Nigeria: Multivariate Correlation Analysis of the 2019 Presidential Election

People’s active participation in elections is one of the key measures of electoral democracy. The people’s lack of interests or apathy in elections tends to undervalue the democratic process, engender mistrust in political institutions, and enthrone unaccountable leadership. This is why voter turnout is a crucial aspect of electoral studies. Even though Nigeria has successfully undergone two decades of uninterrupted democracy, she may not be too fast in imbibing the tenets of electoral democracy which presupposes active people’s participation in the electoral process. This is because there has been a conspicuous decline in voter turnouts in presidential elections since 2003. There are several factors responsible for this decline. This paper analysed three key variables – violence, socioeconomic factors, and candidate’s popularity - with the use of Multivariate Correlation Analysis (a statistical procedure that calculates correlation coefficients of two or more variables to determine the strengths of their relationships). The study, therefore, finds that of the three variables, candidate’s popularity as indicated by voters’ preferences for candidate’s/running mate’s tribe, political party, and trust in candidate’s abilities provide stronger evidence of the declining turnouts in Nigerian presidential elections.

Perspektif terhadap Kawasan Bersejarah: Kategori Pengunjung berdasarkan Korelasi antara Daya Tarik dan Harapan terhadap Kawasan Braga

The Braga area is one of the cultural heritage tourist destinations in Bandung with the attraction of its colonial architecture. The emergence of new buildings in the region is presented without giving attention to the surrounding colonial buildings. The visitor’s perspective on the Braga area is an important basis in regional growth and development. This study aims to find the perspective of visitors based on the correlation between their attraction and expectations of the Braga region. The method used in this study was mixed methods (qualitative-quantitative), and data collection was carried out using a survey through a freely distributed online questionnaire (snowball non-random sampling). The collected data is then analyzed qualitatively using content analysis and quantitatively using principal component analysis, factor analysis, and multivariate correlation analysis. The results of the study revealed the existence of two perspectives, namely appreciative and recreational. The appreciative perspective sees Braga as having an attractive heritage of historical buildings and hopes that Braga will become a conservation area. While the recreational perspective regards Braga as an entertainment area that is unique and hopes for the commodification of the Braga area.

TIPE WISATAWAN BERDASARKAN KORELASI MOTIVASI DAN KEGIATAN DI TEMPAT WISATA (STUDI KASUS: INDONESIA)

Tourism has become a major contributing sector in the economies of many countries in the world, especially Indonesia. The attractiveness of Indonesia comes from a variety of potential such as nature, local wisdom, or artificial. Those attractions make tourist can be defined as many types based on their motives and activities. This research used mixed method (qualitative-quantitative) with sequential procedure strategy. The purpose of this study is to determine the type of tourists based on the correlation between the motivation of travel with tourism activities. Data collection was done through an online questionnaire and distributed to several groups (nonprobability-convenience sampling). The collected data were then analyzed qualitatively using content analysis and quantitatively using principal component analysis, factor analysis, and multivariate correlation analysis. The results of the analysis revealed that there are six tourism motivations namely contemplation, social-exploration, restorative, culinary, opportunity, and novelty. In addition, there are four tourism activities namely physical activity, cognitive, affective, and adventure. The results of the correlation of motivation and tourism activities then form a pattern that shows three types of tourists such as explorer, pleasure seeker, and adventurer.