bluuebunny/crossref_metadata_2025 huggingface dataset:
Design of LTE-Wi-Fi Aggregation with Multiple Wi-Fi APs for Heterogenous Network
Authors: Wijanto Eddy , Wahju Marsellinus Bachtiar , Sukwadi Ronald
Published: April 2023

The growth in mobile data traffic is forcing network operators to find ways to deliver higher bandwidth, better coverage, and better quality of service (QoS) at lower development costs. One method that can be used to meet this need is the aggregation technique. Aggregation techniques that run on several different technologies are called heterogeneous networks (HetNet). Recently, some advanced technologies have been proposed to aggregate different long-term evolution (LTE) carriers or different radio access technologies (RAT) to generate higher bandwidth. Many efforts have been made to improve the throughput of heterogeneous networks. One of the factors that affects the maximum LTE-WLAN aggregation (LWA) throughput is the Wi-Fi access point (AP) signal strength. Since the power of small cells is very low, the LWA range is not very large, so the LWA range needs to be increased. This paper proposes the solution that can be implemented by using multiple Wi-Fi Aps scheme. From the experiments, it found that LWA with multiple Wi-Fi APs has better signal strength than LWA with a single Wi-Fi AP. LWA with multiple Wi-Fi APs further increase the coverage of the network.
Analisis Pemakaian Energi Listrik di Kantin Kampus 2 Universitas Pamulang
Authors: Kusnadi Heri , Nurfadilah Hafidz , Mardiansyah  , Romdhoni
Published: April 2023

Energi listrik merupakan salah satu kebutuhan yang sangat penting untuk kehidupan serta dibutuhkan dalam berbagai kegiatan. Seiring perkembangan zaman kebutuhan listrik akan meningkat dengan adanya peningkatan dan perkembangan baik dari jumlah penduduk, jumlah investasi, perkembangan teknologi termasuk didalamnya perkembangan dunia pendidikan untuk semua jenjang pendidikan. Universitas Pamulang merupakan salah satu lembaga pendidikan yang memiliki kantin dengan konsumsi energi listrik cukup besar dengan total daya terpasang 24.700 VA (24,7 kVA) yang terbagi dalam 19 kios aktif dan 3 kios tidak aktif, dimana masing-masing kios memiliki daya 1.300 VA. Pada penelitian ini dilakukan analisis kapasitas, kebutuhan, dan biaya energi listrik di kantin belakang Kampus 2 UNPAM. Hasil dari penelitian ini  memperlihatkan perbandingan rekening listrik dengan hasil analisis dari perhitungan beban, perhitungan energi dan perhitungan kapasitas daya terpakai. Hasilnya dapat dilihat hasil dari rekening listrik lebih besar dari pada hasil analisis, hal tersebut terjadi karena hasil analisis yang dihitung ideal sehingga tidak mengetahui pemakaian yang tidak terkontrol serta faktor dari jam nyala yang berlebihan sehingga menyebabkan pemakaian energi pada peralatan listrik menjadi besar dan adanya tambahan biaya beban dari pihak PLN persero.
Perancangan Inverter Satu Fasa Berbasis Arduino Menggunakan Metode SPWM
Authors: Santoso Lia , Imron Arizal Mujibtamala Nanda , Kaloko Bambang Sri
Published: April 2023

Pada era berkembangnya teknologi saat ini, manusia tidak dapat terlepas dari kebutuhan energi listrik yang dapat menunjang pemakaian peralatan elektronik untuk setiap kegiatan rumah tangga maupun industri. Sebagian besar kebutuhan listrik memerlukan tegangan ac untuk mengidupkan peralatan listrik. Untuk tempat yang tidak terjangkau tegangan ac dapat menggunakan inverter sebagai alat konversi tegangan. Pada beberapa kasus, saat inverter melakukan konversi tegangan ditemukan beberapa kerusakan pada komponen dan penurunan kualitas output. Rancangan inverter pada paper ini menggunakan komponen yang menyesuaikan spesifikasi alat yang akan mengurangi timbulnya kerusakan pada rangkaian inverter. Arduino Nano digunakan sebagai pembangkit sinyal Pulse-Width Modulation (PWM). Penggunaan metode Sinusoidal Pulse-Width Modulation (SPWM) digunakan untuk menghasilkan tegangan dengan karakteristik gelombang sinus. Dari hasil yang didapatkan, inverter dapat bekerja dengan baik dan tidak mengalami kerusakan, namun output yang dihasilkan belum mencapai target spesifikasi, output tegangan dan arus yang dihasilkan memilki nilai kenaikan yang lebih stabil dan lebih tahan terhadap adanya tegangan jatuh.
Cognitive Correlates of a Large Time Differential between Timed Up and Go and Gait Speed during Inpatient Stroke Rehabilitation
Authors: Kim Hyun , Jaywant Abishek , Toglia Joan , Meyer Amy , Campo Marc , O’Dell Michael W.
Published: April 2023

Purpose:

Cognitive impairment is highly prevalent after stroke but can be difficult to identify acutely. We aimed to study if a large difference between two common, routine physical therapy assessments (Timed Up and Go [TUG] test and 10-Meter Walk Test [10MWT]) could identify patients with subtle cognitive difficulties post-stroke.

Method:

An observational study was conducted in 141 individuals admitted to acute inpatient rehabilitation after stroke. We computed the percent difference between TUG and 10MWT performance. Cognitive outcome measures were the Trail Making Test A and B (TMT-A and -B) and the Functional Independence Measure (FIM)-Cognition subscale. Linear and logistic regression analyses were conducted to evaluate if the difference between TUG and 10MWT was associated with cognitive functioning.

Results:

After adjusting for covariates, there was no significant linear association between TUG-10MWT discrepancy and cognition; however, stroke patients with the largest difference between TUG and 10MWT (highest quartile of scores) exhibited significantly worse attention on the TMT-A (adjusted odds ratio = 2.46, p = 0.04).

Conclusions:

A large difference between TUG and 10MWT may reflect deficits in complex sustained attention in individuals with stroke. Physical therapy staff may use this difference score to identify patients with potential cognitive deficits and refer them for comprehensive neuropsychological evaluation.
Research on the effectiveness of means for intensifying oil compression in twin-screw extrusion presses
Authors: Hudzenko Maksym , Vasyliv Volodymyr , Zheplinska Mariia , Burova Zinaida , Sarana Viktor
Published: April 2023

The relevance of the study is due to the problem that is characteristic of various types of screw press structures, which leave up to 16% of the oil in the cake when pressing sunflower oil. In this regard, the purpose of this study is to find rational methods to improve the design of twin-screw extrusion presses to increase the oil yield. The leading methods for solving this problem are empirical research methods that allow comprehensively considering the stages of improving the geometric configuration of the screw shaft based on observation and finding a rational solution to the problem by measuring and experimenting. The paper analyses the features of technical means for grinding oil-containing raw materials in presses and extrusion presses, justifies the need to develop new grinding working bodies. The need to supplement the existing ideas about the interaction of special grinding working bodies with transport and compressive screw nozzles and the development of grinding units for twin-screw extrusion presses produced in Ukraine are clarified. Experimental studies were conducted with the developed design of new working bodies – cylindrical-conical nozzles. They create an intermediate compression of oil-containing raw materials, aimed at intensifying grinding with simultaneous mixing of the processed oil-containing material. A triple repetition of the increase in the degree of compression was obtained when installing three pairs of cylindrical-conical nozzles along the length of the screw shaft. Their use allowed for intensifying the degree of pressure increase and the additional oil yield of up to 3.1%. With each processed ton of seeds, due to the increase in the amount of pressed oil, the profit of enterprises that will improve twin-screw extrusion presses with these working bodies will also increase accordingly.
Gestão pública na Região Amazônica - Volume 2
Authors: Kruger Juliano Milton , Silva Anderson Lincoln Vital da , Silva Geymeesson Brito da , Filard Mariana Faria
Published: April 2023

Esta coletânea reúne textos produzidos junto aos cursos de Pós-Graduação em Gestão Pública e Gestão em Saúde do IFAM e Gestão Pública Municipal do IFRR. A proposta da coletânea foi discutir temáticas pertinentes à máquina pública acerca da educação, saúde, segurança e gestão, refletindo sobre a capacidade da Administração Pública de prover o crescimento e o desenvolvimento necessário à Amazônia.
Gestão pública na Região Amazônica - Volume 3
Authors: Kruger Juliano Milton , Souza Daniel Cerdeira de , Ribeiro Taiã Mairon Peixoto , Souza Tânia Midian Freitas de
Published: April 2023

Esta coletânea reúne textos produzidos junto aos cursos de Pós-Graduação em Gestão Pública e Gestão em Saúde do IFAM e Gestão Pública Municipal do IFRR. A proposta da coletânea foi discutir temáticas pertinentes à máquina pública acerca da educação, saúde, segurança e gestão, refletindo sobre a capacidade da Administração Pública de prover o crescimento e o desenvolvimento necessário à Amazônia.
Analisis Potensi Sampah Laut Menjadi Briket Sebagai Sumber Energi Alternatif Masyarakat Daerah Pesisir
Authors: Safitri Vira
Published: April 2023

Artikel ini merupakan artikel review dimana dalam artikel dibahas mengenai berbagai jenis sampah laut, kemudian pemilihan sampah yang bisa diolah menjadi briket sebagai sumber energi alternatif masyarakat daerah pesisir. Hal ini dikarenakan jarang ditemukan mengenai pengelolaan sampah menjadi sumber energi yang baik, sehingga dengan adanya artikel ini semoga dapat menjadi rujukan atau ide yang kemudian dapat direalisasikan.
Dynamics of accumulation of photosynthetic pigments in leaves Trititrigia Cziczinii Tzvel.
Authors: Shchuklina O. A. , Voronina O. E. , Kvitko V. E. , Alenicheva A. D. , Voronchikhina I. N. , Zavgorodny S. V.
Published: April 2023

The productivity of plants depends on the efficiency of photosynthetic pigments, of which chlorophyll is the most important. In the conditions of sod-podzolic medium loamy soils of the Moscow region, the features of the accumulation of photosynthetic pigments (chlorophyll a and chlorophyll b) and the photosynthetic apparatus of a new synthetic grain crop Trititrigia cziczinii Tzvel. were studied. (Pamyati Lyubimovoj variety, line № 3202) compared to the winter wheat variety (Rubezhnaya) obtained by remote hybridization. The dynamics of the accumulation of chlorophyll a and chlorophyll b in the leaves of grain crops was measured during the generative development of plants starting from the earing phase (BBCH-scale code 52-53) on a spectrophotometer. The research results showed that all the studied varieties have their peaks of accumulation of the amount of chlorophyll a and chlorophyll b, depending on their biological characteristics. In winter wheat, the maximum amount of the sum of the two pigments fell on July 2 and amounted to 3,3 mg/g of raw leaf mass. In the trititrigia variety of the Pamyati lyubimovoj, the peak of pigment accumulation was noted almost a month later (July 30). The amount of pigments was 4,45 mg/g of raw mass. Trititrigia line № 3202 accumulated the maximum amount of chlorophyll (4,20 mg/g of raw leaf mass) even later than the Pamyati Lyubimovoj variety – August 5. The higher content of photosynthetic pigments in the cells of trititrigia leaves, compared with winter wheat, may indicate its high adaptive characteristics. And the peaks of chlorophyll accumulation, shifted by almost a month, indicate the long-term work of the assimilation apparatus and the uniqueness of the new synthetic culture. The leaf area measured in a straight linear way was different for all the studied objects. The largest leaf area was noted in the variety of trititrigia in Pamyati Lyubimovoj – 21,2 thousand m2/ha on July 13. The maximum leaf area at line № 3202 was 14.4 thousand m2/ha, then it gradually decreased. Rubezhnaya winter wheat had a significantly lower leaf area compared to trititrigia samples (the maximum was 6.1 thousand m2/ha), then the activity of the active assimilating surface decreased.
Perineurioma of the sciatic nerve with reticular, microcystic, and pseudolipoblastic features: illustrative case
Authors: Lenartowicz Karina A. , Amrami Kimberly K. , Torres-Mora Jorge , Spinner Robert J.
Published: April 2023

BACKGROUND

Perineuriomas are peripheral nerve sheath tumors that are composed of benign, localized proliferations of perineural cells and further subclassified as intraneural or extraneural (soft tissue) based on their relationship to the histological boundaries of the nerve. Multiple histological variants have been described, and herein the authors present the first known case of a pseudolipoblastic perineurioma affecting the nerve.

OBSERVATIONS

A 52-year-old woman presented with a 5-year history of progressive, severe left buttock pain radiating down to the top of her foot and ankle, without any associated weakness, with a large mass in her sciatic nerve noted on magnetic resonance imaging (MRI). She underwent resection, which demonstrated a pseudolipoblastic perineurioma of the sciatic nerve, an unusual histological subtype composed of perineurial cells with an abundant clear intracytoplasmic background. Postoperatively, her pain resolved, and follow-up MRI showed no tumor persistence or recurrence.

LESSONS

On imaging, this lesion had a benign appearance, with areas suggestive of subacute hemorrhage, and was associated with a nerve. Although the distinctive morphological features of this lesion may suggest liposarcoma, careful morphological evaluation and appropriate immunohistochemical studies allow its correct classification.
Analysis of Formulation and Implementation Preparation: Waste to Energy Plant Development Policy in Surakarta City
Authors: Ayuningtyas Tiara Kusuma , Nurharjadmo Wahyu
Published: April 2023

The problem of waste as an urgent problem in Surakarta became the beginning of the idea the Waste to Energy of PLTSa Development in Putri Cempo Landfill. This study aims to describe the process of policy formulation and analyze the implementation preparation of PLTSa development policy in Surakarta. This descriptive qualitative study was obtained from interviews with 8 informants and analyze data from results of interviews, documentation, and observations according aspects of policy formulation process and policy implementation preparation. The findings show that the policy formulation process has through several formulation steps of the Draft Regional Regulation Formulation arranged by the executive and still in the draft has planned to be approved in 2020. Changes of central regulation on tipping fee and concerns about potential state losses had hampered the draft. Eventually, the draft has planned to be finished in 2020 and become regional regulation in 2021 but could not be continued because of the budget was refocusing for Covid-19 handling. Nevertheless, the political will of Surakarta about this matter is very serious. This is realized by taking preparatory steps to implement the policy in parallel with the policy formulation process. In the process of preparing for implementation, the Surakarta City Government has made preparations on organizational activities and interpretations. In organizational activities, designation of the implementor has been carried out institutionally and personally, establishment of implementation management with leading sector and collegial pattern, and the scheduling which is now in the construction phase. While the organizational activity being prepared is making SOP, this is somewhat hampered due to limited resources. In the interpretation activity, Surakarta City Government has not yet fully made official communication and socialization preparations to the residents considering that the implementation is unclear, so that it is still passive to residents around the PLTSa construction.
Local Community-based Tourism in The Frame Institutional Theory
Authors: Rentandatu Benhur , Alwi Alwi , Djabbari Muhammad Hidayat
Published: April 2023

The tourism sector is a strategic and superior sector that is the focus of development in supporting the regional economy of Merauke Regency. The tourist attractions of Merauke Regency include natural tourism, cultural tourism and artificial tourism. The wealth of tourism owned can be the main capital in the economic development of Merauke Regency. In addition, its tourism wealth also places Merauke Regency in a strategic position in the tourism constellation of the Unitary State of the Republic of Indonesia. For this reason, the development of local community-based tourism is important to do so as to increase community participation and improve the economy.
This study aims to explain the network of local community-based tourism development policies in Merauke Regency based on three institutional pillars (regulative, normative and cultural-cognitive). This study uses a qualitative approach. Data was collected through interviews, observation and documentation studies. Data processing and analysis techniques were carried out with data reduction, data display, and conclusion drawing/verification. Determination of informants using purvosive sampling technique.
The results of the study show that there is a regulatory synergy, namely the synergy of rules issued by the Merauke district government with the system of rules used in the life of indigenous peoples. Normative shows mentoring and community involvement around tourist sites for the development of skills and knowledge in tourism management, and cultural-cognitive shows the existence of shared knowledge and understanding related to developing economic aspects by creating production centers for the development of the potential of local communities in collaboration with the customs of indigenous peoples in producing their cultural products
Геологія марганцевих родовищ світу. Стаття 2. Перспективи розвитку мінерально-сировинної бази марганцевих руд в Україні
Authors: Rudko H. I. , Karly V. E.
Published: April 2023

Україна займає третю позицію у світі за загальними ресурсами марганцю, які становлять близько 6 % світових ресурсів, і є провідною у світі за споживанням та виробництвом марганцевої продукції (феромарганець, силікомарганець, металічний марганець та ін.).Надано інформацію про будову Нікопольського і Великотокмацького марганцевих родовищ України, проаналізовано умови залягання покладів, потужність шарів і запаси марганцевих руд. Незважаючи на те, що Україна посідає третє місце за світовими запасами марганцю, сьогодні склалася ситуація, коли видобування марганцю не ведеться через загальні проблеми мінерально-сировинної бази марганцю, які потребують запровадження більш досконалих технологічних схем видобування, збагачення руд та переробки концентратів. Крім того, додаткові пошуки власних родовищ високорентабельних марганцевих родовищ сприятимуть успішному розвитку всієї мінерально-сировинної бази корисних копалин нашої держави.
Проблема інноваційного розвитку в сфері публічного управління користуванням надрами залізорудних родовищ
Authors: Iemelianov V. O. , Bahrii I. D. , Kryl Ia. M. , Kuzmenko S. O.
Published: April 2023

Вступ. Однією із найважливіших складових публічного управління в галузі надрокористування є регулювання державою рентних платежів за користування надрами, діюча методологія якого в Україні потребує вдосконалення. Показано, що геолого-технологічні параметри цінності руд мають різні фізичні за природою показники і не можуть бути використані для оцінки руд з метою оподаткування. Запропоновано методику визначення грошової цінності різних родовищ та алгоритм такої оцінки як складових інноваційної методології регулювання рентних платежів за користування надрами.Проблематика. Методи, за якими в Україні розраховують вартість видобутих корисних копалин, а саме: за фактичними цінами реалізації (що часто неможливо, як, наприклад, для бідної залізної руди гірничо-збагачувальних підприємств, з причин її фактичної відсутності на ринку); за розрахунковою вартістю (що взагалі абсурдна ідея з точки зору ринкової економіки), не дозволяють державі об’єктивно визначати геолого-технологічно та економічно обґрунтовану рентну плату за користування надрами. В результаті у Податковий кодекс України закладено абсурдно градуйовану норму рентної плати в залежності від світової ціни на залізорудну сировину, що нічим не обґрунтовано і має суб’єктивний характер.Мета. Розробка інноваційної методології, яка дозволить державі здійснювати геологічно та економічно обґрунтоване регулювання рентних платежів за користування надрами.Матеріали і методи. Комплексне геолого-геохімічне та геолого-технологічне дослідження двох геолого-промислових типів залізних руд: 1) природно-багатої гематитової (мартитової) руди; 2) силікат-магнетитових бідних руд залізистих кварцитів з родовищ Кривбасу. Критичний аналіз літератури з питань законодавчого регулювання платежів за користування надрами в Україні тощо.Результати. Запропоновано розроблену інноваційну методологію геолого-технологічно та економічно обґрунтованого регулювання рентних платежів за користування надрами на прикладі відомих залізорудних родовищ та гірничо-збагачувальних підприємств України.
Pseudoangiomatous stromal hyperplasia of the breast: Clinical evaluation
Authors: Esmer Ahmet Cem , Tazeoglu Deniz , Dag Ahmet
Published: April 2023

BACKGROUND: Pseudoangiomatous stromal hyperplasia is a rare benign breast stromal proliferative lesion of the breast. Clinical presentation ranges from rapidly growing mass to incidental identification in routine screening. This difference in manifestation and its rarity makes it difficult to be a standard treatment protocol. Therefore, we aimed to share our clinical experience in Pseudoangiomatous stromal hyperplasia. METHODS: The files of patients who underwent core biopsy or surgical excision due to a breast mass and resulted in pseudoangiomatous stromal hyperplasia between January 2013 and December 2021 were included in the study. RESULTS: 17 patients with a median age of 37 (22–68) were found Pseudoangiomatous stromal hyperplasia confirmed by surgical excision or core biopsy. Chosen treatment option was observation in 8 patients (47.1%), while surgical excision was used in 9 (52.9%) patients. The mean follow-up period was 55.24 ± 26.72 (13–102) months. None of the patients observed the Malignant transformation during the follow-up period. CONCLUSION: For Pseudoangiomatous Stromal Hyperplasia of the breast, surgical excision with clean margins or close follow-up after diagnosis confirmation by tissue biopsy is sufficient. Pseudoangiomatous Stromal Hyperplasia is not a risk factor for developing breast cancer.
Conventional and contrast-enhanced ultrasound of scleroring angiomatoid nodular transformation of the spleen
Authors: Xu Wei-Chen , Sun Li-Ping , Xu Hui-Xiong , Wang Qiao
Published: April 2023

Sclerosing angiomatoid nodular transformation (SANT) is an uncommon non-tumorous disease of the spleen. The low morbidity and non-specific clinical symptoms of SANT might cause a misdiagnosis. The present study reported a case of a 31-year-old female with a SANT of the spleen. Findings on clinical manifestations and examinations, especially on contrast-enhanced ultrasound (CEUS), were carefully analyzed, and relevant literatures have also been reviewed.
Study of blood rheological parameters and NO in coronary artery disease patients with and without collaterals
Authors: Chigogidze Maia , Mantskava Maia , Sanikidze Tamar , Pagava Zurab , Urdulashvili Tamar , Tsimakuridze Marina , Momtselidze Nana , Sharashidze Nino
Published: April 2023

BACKGROUND: In coronary artery disease (CAD), an alternative way of improvement of blood circulation in the ischemic area of the myocardium is coronary collateral circulation. Our study aimed to investigate the rheological parameters of blood and nitric oxide (NO) content in patients with various degrees of collateral development and the likelihood of the influence of blood fluidity on collateral angiogenesis. METHODS: We studied patients with stable CAD who underwent elective coronary angiography and a control group with the same mean age. We investigated patients with different degrees of developing collaterals and those without them. In studied patients, the blood plasma viscosity, aggregability, and deformability of erythrocytes, as the main indicators of blood rheology. We recorded content of stable metabolic end products of nitric oxide (NOx). RESULTS: Results of the studies showed that in the blood of studied patients with CAD erythrocyte aggregation was increased and NO content decreased compared to the control level; NO content was as lower, as less was the number of developed collaterals was recorded. CONCLUSION: In this work, the role of the aggregation ability of erythrocytes and the endothelial origin of NO in the direct and feedback regulatory mechanism of angiogenesis in patients with CAD are discussed.
Bayesian decision making under soft probabilities
Authors: Zou Yuan
Published: April 2023

Bayesian decision models use probability theory as a commonly technique to handling uncertainty and arise in a variety of important practical applications for estimation and prediction as well as offering decision support. But the deficiencies mainly manifest in the two aspects: First, it is often difficult to avoid subjective judgment in the process of quantization of priori probabilities. Second, applying point-valued probabilities in Bayesian decision making is insufficient to capture non-stochastically stable information. Soft set theory as an emerging mathematical tool for dealing with uncertainty has yielded fruitful results. One of the key concepts involved in the theory named soft probability which is as an immediate measurement over a statistical base can be capable of dealing with various types of stochastic phenomena including not stochastically stable phenomena, has been recently introduced to represent statistical characteristics of a given sample in a more natural and direct manner. Motivated by the work, this paper proposes a hybrid methodology that integrates soft probability and Bayesian decision theory to provide decision support when stochastically stable samples and exact values of probabilities are not available. According to the fact that soft probability is as a special case of interval probability which is mathematically proved in the paper, thus the proposed methodology is thereby consistent with Bayesian decision model with interval probability. In order to demonstrate the proof of concept, the proposed methodology has been applied to a numerical case study regarding medical diagnosis.
An improved BRB-based anomaly detection method of drive end bearings
Authors: Shao Yubo , Zhang Bangcheng , Yin Xiaojing , Gao Zhi , Li Jing
Published: April 2023

The anomaly detection research of drive end bearings (DEBs) is of great significance to the safe and reliable operation of hoist. This paper proposes an anomaly detection method of DEBs based on the linear weighted sum combines with the belief rule base. First, in order to improve the accuracy of anomaly detection, the time-domain features and frequency-domain features are integrated by linear weighted sum (LWS) respectively. Then, belief rule base (BRB) method is provided for anomaly detection using fused features. Meanwhile, the covariance matrix adaption evolution strategy (CMA-ES) is utilized to optimize the parameters of belief rule base model. Finally, the validity of the proposed method is verified by the vibration data, which are acquired from the condition monitoring system of hoist in body-in-white (BIW) welding production line. The proposed method achieves a high detection accuracy. It is proved that the proposed method is suitable for anomaly detection of DEBs in the actual BIW welding production line.
Novel results on G -lower L -fuzzy rough approximation operator in ( O , G ) -fuzzy rough set model1
Authors: Han Nana , Qiao Junsheng
Published: April 2023

Lately, Jiang and Hu (H.B. Jiang, B.Q. Hu, On ( O , G ) -fuzzy rough sets based on overlap and grouping functions over complete lattices, Int. J. Approx. Reason. 144 (2022) 18-50.) put forward ( O , G ) -fuzzy rough sets via overlap and grouping functions over complete lattices. Meanwhile, they showed the characterizations of O -upper and G -lower L -fuzzy rough approximation operators in ( O , G ) -fuzzy rough set model based on some of specific L -fuzzy relations and studied the topological properties of the proposed model. Nevertheless, we discover that the partial results given by Jiang and Hu could be further optimized. So, as a replenish of the above article, in this paper, based on G -lower L -fuzzy rough approximation operator in ( O , G ) -fuzzy rough set model, we further explore several new conclusions on the relationship between G -lower L -fuzzy rough approximation operator and different L -fuzzy relations. In particular, the equivalent descriptions of relationship between G -lower L -fuzzy rough approximation operator and O -transitive ( O -Euclidean) L -fuzzy relations are investigated, which are not involved in above literature and can make the theoretical results of this newly fuzzy rough set model more perfect.
The resolution of q-rung orthopair fuzzy set based three-way group conflict analysis
Authors: Lin Tiantai , Yang Bin
Published: April 2023

In social life, conflict situations occur frequently all the time. To analyse a conflict situation, not only the intrinsic reason of the conflict but also the resolution of the conflict should be given. In this paper, we propose a combine conflict analysis model under q-rung fuzzy orthopair information system that contain conflict resolution, which is called discern function-based three-way group conflict analysis. Firstly, we propose three novel form conflict distances which are induced by discern functions, and examine their properties, then the comprehensive conflict distances are given based on the normality and symmetry they share. Thus, the conflict analysis and resolution method in our model can be directly gained based on these novel form conflict distances. Secondly, from the view of group decision, the comprehensive q-rung fuzzy loss function is attained by aggregating a group of q-rung fuzzy loss functions through the q-rung orthopair fuzzy weighted averaging operator in the procedure of conflict resolution. Finally, we employ an example of the governance of a local government to demonstrate the process of finding an optimal feasible strategy in our model.
An ensemble deep learning classifier stacked with fuzzy ARTMAP for malware detection
Authors: Al-Andoli Mohammed Nasser , Tan Shing Chiang , Sim Kok Swee , Goh Pey Yun , Lim Chee Peng
Published: April 2023

Malicious software, or malware, has posed serious and evolving security threats to Internet users. Many anti-malware software packages and tools have been developed to protect legitimate users from these threats. However, legacy anti-malware methods are confronted with millions of potential malicious programs. To combat these threats, intelligent anti-malware systems utilizing machine learning (ML) models are useful. However, most ML models have limitations in performance since the training depth is usually limited. The emergence of Deep Learning (DL) models allow more training possibilities and improvement in performance. DL models often use gradient descent optimization, i.e., the Back-Propagation (BP) algorithm; therefore, their training and optimization procedures suffer from local sub-optimal solutions. In addition, DL-based malware detection methods often entail single classifiers. Ensemble learning overcomes the shortcomings of individual techniques by consolidating their strengths to improve the performance. In this paper, we propose an ensemble DL classifier stacked with the Fuzzy ARTMAP (FAM) model for malware detection. The stacked ensemble method uses several heterogeneous deep neural networks as the base learners. During the training and optimization process, these base learners adopt a hybrid BP and Particle Swarm Optimization algorithm to combine both local and global optimization capabilities for identifying optimal features and improving the classification performance. FAM is selected as a meta-learner to effectively train and combine the outputs of the base learners and achieve robust and accurate classification. A series of empirical studies with different benchmark data sets is conducted. The results ascertain that the proposed ensemble method is effective and efficient, outperforming many other compared methods.
Analysis of birth rates in China with uncertain statistics
Authors: Ye Tingqing , Zheng Haoran
Published: April 2023

Uncertain statistics is a set of mathematical techniques to collect, analyze and interpret data based on uncertainty theory. In addition, probability statistics is another set of mathematical techniques based on probability theory. In practice, when to use uncertain statistics and when to use probability statistics to model some quality depends on whether the distribution function of the quality is close enough to the actual frequency. If it is close enough, then probability statistics may be used. Otherwise, uncertain statistics is recommended. In order to illustrate it, this paper employs uncertain statistics, including uncertain time series analysis, uncertain regression analysis and uncertain differential equation, to model the birth rate in China, and explains the reason why uncertain statistics is used instead of probability statistics by analyzing the characteristics of the residual plot. In addition, uncertain hypothesis test is used to determine whether the estimated uncertain statistical models are appropriate.
Effects of gait training on structural brain changes in Parkinson’s disease
Authors: Kim Eunkyung , Kim Heejae , Yun Seo Jung , Kang Min-Gu , Shin Hyun Iee , Oh Byung-Mo , Seo Han Gil
Published: April 2023

Background: Gait training may lead to functional brain changes in Parkinson’s disease (PD); however, there is a lack of studies investigating structural brain changes after gait training in PD. Objective: To investigate structural brain changes induced by 4 weeks of gait training in individuals with PD. Methods: Diffusion tensor imaging and structural T1 images were acquired in PD group before and after robot-assisted gait training or treadmill training, and in healthy control group. Tract-based spatial statistics and tensor-based morphometry were conducted to analyze the data. The outcome of gait training was assessed by gait speed and dual-task interference of cognitive or physical tests of the 10-meter walking test representing gait automaticity. The associations between structural brain changes and these outcomes were investigated using correlation analysis. Results: A total of 31 individuals with PD (68.5±8.7 years, the Hoehn & Yahr stage of 2.5 or 3) and 28 healthy controls (66.6±8.8 years) participated in this study. Compared to the controls, PD group at baseline showed a significant increased fractional anisotropy (FA) in the right forceps minor and bilateral brainstem and reduced radial diffusivity (RD) in the right superior longitudinal fasciculus, as well as the expanded structural volumes in the several brain areas. After gait training, FA increased in the left internal capsule and it decreased in the left cerebellum Crus I, while the structural volume did not change. The increased FA in the left internal capsule positively correlated with the baseline gait speed and negatively correlated with gait speed improvement; moreover, the decreased FA in the left cerebellum Crus I negatively correlated with the baseline gait speed during the cognitive task. Conclusions: Gait training induces white matter changes in the brain of individuals with PD, which suggests the improvement of brain structural pathology to mitigate the impact of neurodegenerative consequences.
Vestibular symptoms are related to the proportion of REM sleep in people with sleep complaints: A preliminary report
Authors: Altena Ellemarije , Buguet Estelle , Higginson Caitlin , Lee Elliott , Douglass Alan , Spitale Naomi , Robillard Rebecca
Published: April 2023

OBJECTIVE/BACKGROUND: Though sleep problems (apnea, insomnia) and related daytime symptoms (fatigue, anxiety, depression) have been associated with vestibular problems (falls, dizziness), it is not well known which particular sleep features relate to vestibular problems. We thus assessed symptoms of vestibular problems in patients visiting a sleep clinic and evaluated how they were associated with objective sleep parameters derived from polysomnography and relevant daytime symptoms. PATIENTS/METHODS: The polysomnography data of thirty-one patients (61% female, between 20 and 79 years of age) who were referred for clinical sleep assessment was collated with subjective measures of symptoms linked to vestibular problems (rated on the Situational Characteristics Questionnaire), as well as fatigue, anxiety and depression symptoms. Multiple linear regression was used to identify factors associated with vestibular symptoms, including analyses adjusted for age, sex, medication use and total sleep time. RESULTS: A higher percentage of REM sleep and more severe anxiety symptoms were independently associated with more severe vestibular symptoms, which survived adjusted analyses. Other sleep stages, as well as as sleep efficiency, apnea-hypopnea index and oxygen saturation were not significantly related to vestibular symptoms. CONCLUSIONS: These results point at vestibular symptoms as possible important and overlooked correlates of variations in sleep architecture in individuals with sleep complaints. Though replication is needed to confirm findings from this limited sample, the results highlight the importance of assessing vestibular symptoms in people with sleep complaints. In particular, further investigations will need to address the potential implication of REM sleep for vestibular functions and the directionality of this relation.
A one-step method for quantitative microwave-induced thermoacoustic tomography
Authors: Chen Yi , Liu Yue , Wu Dan , Wen Yanting , Li Lun , Jiang Huabei
Published: April 2023

BACKGROUND: Electrical conductivity directly correlates with tissue functional information such as blood and water contents, and quantitative extraction of tissue conductivity is of significant importance for disease detection and diagnosis using microwave-induced thermoacoustic tomography (TAT). OBJECTIVE: The existing quantitative TAT (qTAT) approaches capable of extracting tissue conductivity require two steps for the recovery of conductivity. Such two steps approaches depend on an accurate knowledge of the microwave energy loss distribution in tissue and offer a slow computational convergence rate. The purpose of this study is to develop a new algorithm to reconstruct tissue conductivity with higher reconstruction accuracy and greater computational efficiency. METHODS: We propose an improved qTAT method for direct recovery of tissue conductivity from thermoacoustic data measured along the boundary with only one step without the dependence of microwave energy loss information. The feasibility of our one-step qTAT method is validated in both simulated and tissue-mimicking phantom experiments with single-target and multi-target configurations with different contrast levels. RESULTS: Compared with the previous two-step methods, our one-step qTAT method improves the accuracy of conductivity recovery with approximately one-fold reduction in the mean absolute error (MAE) and root mean square error (RMSE) with p-values greater than 0.05. In addition, the convergence rate is improved by more than two folds for the one-step method. CONCLUSIONS: The study demonstrates that new method can quantitatively reconstruct conductivity of tissue more accurately and efficiently over the existing qTAT methods, leading to potentially enhanced accuracy for disease detection and diagnosis.
EFFECT OF GUIDED EDUCATION ON PERCEPTION AND ATTITUDE OF CHILDBEARING WOMEN TOWARDS CAESAREAN SECTION IN NIGERIA
Authors: Edward Mary Idowu , Bolarinwa Oluwaseun Segun , Ajibade Omowumi Suuru , Aregbesola Temilola Mabel
Published: April 2023

Background: Nigerian women are unwilling to have a Caesarean section because of the general belief that abdominal delivery is a reproductive failure on their part regardless of the feasibility of vaginal birth after Caesarean section and the decreasing mortality from Caesarean sections. Aim: The primary objective of this study was to investigate the existence of a significant relationship between pregnant women’s knowledge and attitudes toward cesarean delivery before and after training. Materials and Methods: The study employed a pre/post-test study design, using questionnaires to obtain data from 152 childbearing women attending antenatal in Iloro Basic Health Centre, Akure, Ondo State. Descriptive statistics were used to summarize and present data. Associations between variables were tested using Spearman correlation at a p-value 0.05 level of significance. Results: The researcher found a significant relationship between the knowledge and attitude of pregnant women towards Caesarean section delivery before and after the training. The findings revealed an increase in the knowledge of mothers after the educational intervention, mothers would opt for a Caesarean section if it is necessary to protect them and the baby and they believe that it is a woman’s right to choose a Caesarean section for herself. Significant relationship exists between knowledge and attitudes toward the Caesarean section. Conclusion: It was concluded that childbearing mothers still believe that vagina delivery is a natural delivery and there is joy attached to it, however, most women would still prefer vagina delivery to Caesarean section. The study recommends a need for awareness programs to enhance women’s and the community positive perception towards the Caesarean section in Nigeria.
The prognostic significance of serum lactate dehydrogenase to albumin ratio in pancreatic ductal adenocarcinoma
Authors: Bilge Hüseyin , Başol Ömer , Demir Baran , Oğuz Abdullah
Published: April 2023

Objective: This study was performed to investigate the prognostic role of lactate dehydrogenase/albumin ratio (LAR) and pancreatic ductal adenocarcinoma (PDAC) with initial curable resection treatment.
Materials and Methods: This retrospective study was conducted with the data of patients with resectable PDAC. The (ROC) analysis showed that the optimal sill value for pretreatment LAR was 91.43 and this threshold value was used in other analyses. Univariate and multivariate analyses were performed to determine the prognostic factors for overall survival (OS).
Results: Our study consisted of 70 patients with a mean age of 59.5±13.2 years and 37 (52,9%) women. OS was 50 months in LAR <91.43 (n = 32) patients and 27,7 months in LAR≥91.43 (n=38) patients, respectively. Kaplan–Meier curves showed that LAR≥91.43 was significantly associated with worse OS (p=0.029). Multivariate analyses proved that LAR was an independent predictor in resectable PDAC patients (p=0.017).
Conclusion: Our results showed that a high pre-treatment LAR level was a unfavorable prognosticator in PDAC patients undergoing curative resection. LAR has the potential to be a prognostic biomarker in clinical practice.
Malignancy and sarcoidosis: A single center experience from Turkey
Authors: Esendağlı Dorina , Köksal Deniz , Sarınç Ulaşlı Sevinç , Emri Salih
Published: April 2023

Objective: The relationship between cancer and sarcoidosis has been a research topic for a long time. An increased risk of sarcoidosis and sarcoid-like reactions is suggested in patients with malignant disease. The present study aimed to describe the clinical characteristics and the prognosis of 15 Turkish patients who had a diagnosis of both malignancy and sarcoidosis.
Methods: The patients admitted to our department between October 2013 and October 2018 were included in this study. Patient data including, the demographic data, clinical, radiological, pathological findings, and applied treatment modalities were retrieved from hospital database.
Results: The study included 14 females and 1 male with a mean age of 53.3±11.4 years. Malignancy was the preceding diagnosis in 13 patients. The mean interval time between two diagnoses was 4±3.6 years. Fourteen patients recovered from their cancer, only 1 patient with relapsed NHL was deceased. The most common type of malignancy was breast (n=7) and endometrium (n=3) carcinoma. Surgery was the primary therapeutic modality in 14 patients. Additionally patients received certain drugs which might contribute to onset of sarcoidosis such as Cyclophosphamide (n=8), Adriamycin (n=8), Trastuzumab (n=2), and Rituximab (n=1). Ten patients were asymptomatic for sarcoidosis and 7 patients had stage I pulmonary sarcoidosis. Two third of the patients (n=10) did not receive any therapy for sarcoidosis.
Conclusion: This study involves a few number of patients and according to the analysis of this group the presence of malignancy and sarcoidosis in the same patient might promote good prognosis for both entities. However the onset of sarcoidosis during the follow-up period is a challenging clinical condition and a biopsy is needed for differential diagnosis and management decision. Yet the biopsy might not be enough to differentiate between sarcoidosis and the sarcoid reactions related to malignancy. Future studies are needed to enlighten the underlying pathogenesis.
Economic analysis of conspicuous waste: historical overview and modern approaches
Authors: Shishkina T. M.
Published: April 2023

Both conspicuous waste practices and their analysis have undergone significant changes since Veblen first defined them in his “Theory of leisure class” over a century ago. The article provides a comparative interdisciplinary overview of the approaches to the analysis of the economic practices of conspicuous waste. The first part of the article focuses on original approach to conspicuous waste that was proposed by Veblen, who suggested that such waste allows economic agents to maximize a special kind of utility. As this approach assumes that conspicuous waste works as a quasi-language system where the information about social status and wealth of the person is being coded, transferred and decoded, the article suggests naming it “semiotic approach”. The next part of the article considers the development of this approach in the works by Galbraith, Baudrillard, and Douglas and Isherwood. Both advantages and limitations of this approach are being considered, and possible alternative approach, based on the application of behavioral economics, is being suggested. The final part of the article provides an application of the received findings to the analysis of the modern digitalized practices of conspicuous leisure. Thus, the article examines the influence of digitalization on the dynamics between conspicuous consumption and leisure, the ways economic practices of conspicuous waste have changed within the framework of social media, and the impact of this change on the modern labour/leisure balance.