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You searched for: Journal Heliyon Remove constraint Journal: Heliyon Publication Year 2021 Remove constraint Publication Year: 2021 Source 2021 v.7 no.3 Remove constraint Source: 2021 v.7 no.3
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1. A bibliometric analysis of micro electro mechanical system energy harvester research

Author:
Hamidah, Ida; Pawinanto, Roer Eka; Mulyanti, Budi; Yunas, Jumril
Source:
Heliyon 2021 v.7 no.3 pp. e06406
ISSN:
2405-8440
Subject:
bibliometric analysis; computer software; energy; guidelines; renewable energy sources; sustainable development; vibration; China
Abstract:
... Micro Electro Mechanical System (MEMS) energy harvester's research interests have been increasing rapidly, indicating that the topic has given significant contributions to the sustainable development of energy alternatives. Although many research activities have been conducted and reported since several years ago, only limited efforts have been made to analyze the research's impact in this area. I ...
DOI:
10.1016/j.heliyon.2021.e06406

2. A case study of the relationship between smallholder farmers' ICT literacy levels and demographic data w.r.t. their use and adoption of ICT for weather forecasting

Author:
Alant, Busisiwe Precious; Bakare, Olusegun Ojo
Source:
Heliyon 2021 v.7 no.3 pp. 1-9
ISSN:
2405-8440
Subject:
case studies; climate; climate change; communications technology; curriculum; food production; food security; infrastructure; irrigation; literacy; livelihood; marital status; marriage; mobile telephones; questionnaires; social sciences; statistics
Abstract:
... Food insecurity caused by climate change has become one of the main issues on the global agenda. Worldwide, the importance of digital tools as a means to enhance adaptive capacity and resilience of smallholder farmers (SHFs) in the face of climate variability has long been recognised. Technology-based systems in agriculture frequently neglect to consider the actual context of use and adoption by S ...
DOI:
10.1016/j.heliyon.2021.e06403

3. A comparison of microwave and ultrasound routes to prepare nano-hydroxyapatite fertilizer improving morphological and physiological properties of maize (Zea mays L.)

Author:
Sajadinia, Homa; Ghazanfari, Dadkhoda; Naghavii, Kazem; Naghavi, Hormozd; Tahamipur, Batool
Source:
Heliyon 2021 v.7 no.3 pp. e06094
ISSN:
2405-8440
Subject:
Zea mays; corn; hydroxyapatite; particle size distribution; phosphorus; resource management; superphosphate; triple superphosphate; ultrasonics
Abstract:
... Hydroxyapatite nanoparticles have a remarkable potential to be used as nano-fertilizers with great effects on improving the yield of plants. These nano-compounds were synthesized using microwave and ultrasound methods, which decrease the particle size distribution of the products. To investigate the effects of two types of simple and triple superphosphate fertilizers on some properties of maize pl ...
DOI:
10.1016/j.heliyon.2021.e06094

4. A content analysis of newspaper coverage of COVID-19 pandemic for developing a pandemic management framework

Author:
Zafri, Niaz Mahmud; Afroj, Sadia; Nafi, Imtiaz Mahmud; Hasan, Md. Musleh Uddin
Source:
Heliyon 2021 v.7 no.3 pp. e06544
ISSN:
2405-8440
Subject:
COVID-19 infection; automation; biological hazards; education; health services; lifestyle; pandemic; temporal variation; Bangladesh
Abstract:
... The emergence of COVID-19 pandemic has not only shaken the global health sector, but also almost every other sector, including economic and education sectors. Newspapers are performing a significant role by featuring the news of COVID-19 from its very onset. The temporal fluctuation of COVID-19 related key themes presented in newspaper articles and the findings obtained from them could offer an ef ...
DOI:
10.1016/j.heliyon.2021.e06544

5. Adolescent-parent communication on sexual and reproductive health issues and associated factors among secondary school students in Woreta town, Northwest Ethiopia: An institutional based cross sectional study

Author:
Wudineh, Kihinetu Gelaye; Chekole, Fentahun Alemnew; Tesfu, Azimeraw Arega
Source:
Heliyon 2021 v.7 no.3 pp. e06528
ISSN:
2405-8440
Subject:
World Health Organization; adolescents; cross-sectional studies; descriptive statistics; questionnaires; regression analysis; secondary education; Ethiopia
Abstract:
... World Health Organization states adolescents as persons whose age is between 10–19 years. In Ethiopia, sexual and reproductive health problems of adolescents are high. Parent-adolescent communication regarding sexual and reproductive health issues is important to reduce adolescent risky sexual behaviors.The goal of the study was to assess adolescent communication on sexual and reproductive health ...
DOI:
10.1016/j.heliyon.2021.e06528

6. Adoption of soil and water conservation technology and its effect on the productivity of smallholder rice farmers in Southwest Nigeria

Author:
Ojo, Temitope O.; Baiyegunhi, Lloyd J.S.; Adetoro, Adetoso A.; Ogundeji, Abiodun A.
Source:
Heliyon 2021 v.7 no.3 pp. e06433
ISSN:
2405-8440
Subject:
atmospheric precipitation; climate change; education; farm size; gender; labor; marital status; models; regression analysis; rice; soil; stakeholders; temperature; water conservation; Nigeria
Abstract:
... This study estimated the effect of the adoption of soil and water conservation (SWC) on the productivity of 360 smallholder rice farmers in Southwest Nigeria. An endogenous switching regression model (ESRM) was employed to estimate the productivities of adopter and non-adopters of SWC. A doubly robust inverse-probability-weighted regression adjustment (IPWRA) was used as a credible remedy for pote ...
DOI:
10.1016/j.heliyon.2021.e06433

7. Advanced design and manufacturing of custom orthotics insoles based on hybrid Taguchi-response surface method

Author:
Anggoro, P.W.; Bawono, B.; Jamari, J.; Tauviqirrahman, M.; Bayuseno, A.P.
Source:
Heliyon 2021 v.7 no.3 pp. e06481
ISSN:
2405-8440
Subject:
Taguchi method; diabetes; ethylene-vinyl acetate; foams; hardness; hybrids; mathematical models; signal-to-noise ratio; surface roughness
Abstract:
... Herein, a machining strategy to fabricate custom orthotic insoles with high surface finish and wide fit tolerance is presented. CNC milling was used to machine ethylene-vinyl acetate (EVA) foam for insoles with various surface hardness, and the Taguchi-response surface method (TM-RSM) was adopted to optimize the parameters of the CNC milling process (cutting speed, feed rate, tool path strategy, a ...
DOI:
10.1016/j.heliyon.2021.e06481

8. African Growth and Opportunity Act and trade performance in Nigeria

Author:
Osabohien, Romanus; Adeleye, Ngozi; Osabuohien, Evans
Source:
Heliyon 2021 v.7 no.3 pp. e06410
ISSN:
2405-8440
Subject:
exports; socioeconomics; stakeholders; statistical inference; Nigeria
Abstract:
... This study examines the implementation status of the African Growth Opportunity Act (AGOA) and its performance in Nigeria using socio-economic indicators. Also, the study provides recommendations on how Nigeria can harness the opportunities latent in AGOA using statistical inference and in-depth interview with relevant stakeholders. The findings show that despite the privileged economic relations ...
DOI:
10.1016/j.heliyon.2021.e06410

9. A green microwave method for synthesizing a more stable phthalazin-1-ol isomer as a good anticancer reagent using chemical plasma organic reactions

Author:
Rizk, Sameh A.; El-Hashash, Maher A.; Youssef, Amr A.; Elgendy, Abdelfattah T.
Source:
Heliyon 2021 v.7 no.3 pp. e06220
ISSN:
2405-8440
Subject:
activation energy; anise; antineoplastic activity; antineoplastic agents; chemical equilibrium; entropy; isomers; models; nuclear magnetic resonance spectroscopy; oils; spectral analysis; temperature; thermal stability
Abstract:
... Conventional synthesis of the phthalazine has already allowed affording the phthalazin-1-one phthalazin-1-ol dynamic equilibrium that decreases the anticancer activity due to diminishing the concentration of the phthalazin-1-ol product. Nowadays, pure phthalazin-1-ol (5) can be gaining by using green microwave tools that increase the power of the phthalazine nucleus as an anticancer drug. A micros ...
DOI:
10.1016/j.heliyon.2021.e06220

10. Alginates as food ingredients absorb extra salt in sodium chloride-treated mice

Author:
Fujiwara, Yukio; Maeda, Ryoko; Takeshita, Hidenori; Komohara, Yoshihiro
Source:
Heliyon 2021 v.7 no.3 pp. e06551
ISSN:
2405-8440
Subject:
ammonium; blood; calcium alginate; dialysis; excretion; hypertension; kidneys; overdose; potassium; quality of life; renal function; saltiness; sodium
Abstract:
... Many patients with impaired renal function undergoing dialysis are subject to severe dietary restrictions. Especially overdose of salt is related to crisis of their life, so their meals are basically salt-free or low salt. Therefore, their quality of life is declined due to their yearning for salty taste. In the present study, we searched new salt-adsorbing food materials in dietary fibers to deve ...
DOI:
10.1016/j.heliyon.2021.e06551

11. Alkali activation of compacted termite mound soil for eco-friendly construction materials

Author:
Mahamat, Assia Aboubakar; Obianyo, Ifeyinwa Ijeoma; Ngayakamo, Blasuis; Bih, Numfor Linda; Ayeni, Olugbenga; Azeko, Salifu T.; Savastano, Holmer
Source:
Heliyon 2021 v.7 no.3 pp. e06597
ISSN:
2405-8440
Subject:
Fourier transform infrared spectroscopy; Isoptera; X-radiation; X-ray diffraction; aluminum silicates; compression strength; crystal structure; dimensional stability; energy; mechanical properties; microstructure; soil; temperature; termite mounds
Abstract:
... This investigation prospects the feasibility of optimizing the mechanical behavior and dimensional stability of termite's mound soil through alkaline activation. The raw aluminosilicate (termites' soil) was used without any pre-thermal treatment and natural occurring potash was used as the alkaline activator. Different activation level and different initial curing temperature were adopted to exami ...
DOI:
10.1016/j.heliyon.2021.e06597

12. Altered serum elements, antioxidants, MDA, and immunoglobulins are associated with an increased risk of seborrheic dermatitis

Author:
Jahan, Ishrat; Islam, Md. Rabiul; Islam, Md. Reazul; Ali, Rubaiya; Rahman, S.M. Matiur; Nahar, Zabun; Hasnat, Abul; Islam, Md. Saiful
Source:
Heliyon 2021 v.7 no.3 pp. e06621
ISSN:
2405-8440
Subject:
absorption; blood serum; calcium; case-control studies; copper; dermatitis; fungi; immunoglobulin A; iron; magnesium; malondialdehyde; manganese; nutrition; pathophysiology; risk; spectroscopy; vitamin E; zinc
Abstract:
... The exact mechanism for the pathophysiology of seborrheic dermatitis (SD) remains unknown. According to past knowledge, neuropsychiatric disorders, weak immune responses, fungal infections, antioxidants deficiencies, and inadequate nutrition might involve in SD. Here we evaluated serum trace elements, micronutrients, antioxidants, malondialdehyde (MDA), and immunoglobulins in SD patients.This case ...
DOI:
10.1016/j.heliyon.2021.e06621

13. A novel algorithm for high compression rates focalized on electrical power quality signals

Author:
Ruiz, Milton; Simani, Silvio; Inga, Esteban; Jaramillo, Manuel
Source:
Heliyon 2021 v.7 no.3 pp. e06475
ISSN:
2405-8440
Subject:
algorithms; electric power; information storage; wavelet
Abstract:
... This research proposes a high-performance algorithm for the compression rate of electrical power quality signals, using wavelet transformation. To manage the massive amount of data the telecommunications networks are constantly acquiring it is necessary to study techniques for data compression, which will save bandwidth and reduce costs extensively by avoiding having massive data storage facilitie ...
DOI:
10.1016/j.heliyon.2021.e06475

14. A novel approach to teaching Hidden Markov Models to a diverse undergraduate population

Author:
Heller, Philip; Pogaru, Pratyusha
Source:
Heliyon 2021 v.7 no.3 pp. e06437
ISSN:
2405-8440
Subject:
DNA; bioinformatics; computer software; mathematics
Abstract:
... Hidden Markov Models (HMMs) are an essential tool for Bioinformatic analysis, with extensive success at finding patterns (e.g. CRISPR arrays or genes of interest) in DNA or protein sequences. HMMs are conceptually intricate, and the algorithms that make use of them are complicated. Thus they present a challenge to Bioinformatics instructors at the undergraduate level, particularly when the student ...
DOI:
10.1016/j.heliyon.2021.e06437

15. A novel immuno-oncology algorithm measuring tumor microenvironment to predict response to immunotherapies

Author:
Nielsen, Tyler J.; Ring, Brian Z.; Seitz, Robert S.; Hout, David R.; Schweitzer, Brock L.
Source:
Heliyon 2021 v.7 no.3 pp. e06438
ISSN:
2405-8440
Subject:
adaptive immunity; algorithms; biomarkers; breast neoplasms; epithelium; immunotherapy; lung neoplasms; models; neutrophils; odds ratio; patients
Abstract:
... Immune checkpoint inhibitor (ICI) therapies can improve clinical outcomes for patients with solid tumors, but relatively few patients respond. Because ICI therapies support an adaptive immune response, patients with an active tumor microenvironment (TME) may be more likely to respond, and thus biomarkers capable of discerning an active from a quiescent TME may be useful in patient selection. We de ...
DOI:
10.1016/j.heliyon.2021.e06438

16. A novel quadband ultra miniaturized planar antenna with metallic vias and defected ground structure for portable devices

Author:
Moukala Mpele, Pierre; Moukanda Mbango, Franck; Konditi, Dominic B.O.; Ndagijimana, Fabien
Source:
Heliyon 2021 v.7 no.3 pp. e06373
ISSN:
2405-8440
Subject:
prototypes; satellites; surface area; wavelengths
Abstract:
... A novel heart-shaped monopole antenna used in wireless portable communication devices is proposed and discussed in this paper. The antenna has a radiant patch surface area of 28.504 mm², the physical size of 15 × 12.5 × 1 mm³, and electrical dimensions of 0.095λ₀ × 0.079λ₀ × 0.006λ₀, where λ₀ denotes the wavelength of the free space at 1.89 GHz. Its prototype is printed on FR4 HTG-175, having a pe ...
DOI:
10.1016/j.heliyon.2021.e06373

17. Anthropogenic menace on sacred natural sites: the case of Me'ee Bokko and Daraartu sacred shrines in Guji Oromo, Southern Ethiopia

Author:
Roba, Gemeda Odo
Source:
Heliyon 2021 v.7 no.3 pp. e06460
ISSN:
2405-8440
Subject:
Christianity; Muslims; anthropology; focus groups; people; qualitative analysis; trees; Ethiopia
Abstract:
... This article explores the anthropogenic menaces affecting Me'ee Bokko and Daraartu sacred shrines among Guji Oromo, in Adoolaa Reeddee and Annaa Sorraa districts, Southern Ethiopia. This study employed qualitative approach, ethnographic research design, and methods of data production like in-depth interview; transect walk, and focus group discussions. The findings indicate that the expansion and t ...
DOI:
10.1016/j.heliyon.2021.e06460

18. Anxiety among the Sudanese university students during the initial stage of COVID-19 pandemic

Author:
Abas, Isra Mohamed Yassin; Alejail, Isra Isam Eldeen Mohammed; Ali, Suad Mohamed
Source:
Heliyon 2021 v.7 no.3 pp. e06300
ISSN:
2405-8440
Subject:
COVID-19 infection; anxiety; economic outlook and situation; fever; headache; inventories; mouth; pharyngitis; questionnaires; Sudan
Abstract:
... Since the emergence of the novel coronavirus disease 19 (COVID-19), many people were facing daily life changes that could predispose them to anxiety. For the Sudanese university students, the situation is even more complicated because of the limited availability of online learning and the difficult economic situation of the country. The objective of this study is to assess the students' anxiety le ...
DOI:
10.1016/j.heliyon.2021.e06300

19. Anxiety and depression due to 2019 SARS-CoV-2 among frontier healthcare workers in Kenya

Author:
Onchonga, David; Ngetich, Enoch; Makunda, Wilbroda; Wainaina, Pius; Wangeshi, Diana; viktoria, Prémusz
Source:
Heliyon 2021 v.7 no.3 pp. e06351
ISSN:
2405-8440
Subject:
COVID-19 infection; Severe acute respiratory syndrome coronavirus 2; anxiety; females; health services; pandemic; questionnaires; regression analysis; Kenya
Abstract:
... The novel coronavirus disease continues to spread across the globe, causing anxiety and depression among healthcare workers.The current study aimed to determine the levels of anxiety and depression due to the coronavirus pandemic among healthcare workers in Kenya.A total sample of 476 respondents participated. The 7-item Generalized Anxiety Disorder Scale (GAD-7) and Patient-Health Questionnaire ( ...
DOI:
10.1016/j.heliyon.2021.e06351

20. Anxiogenic and memory impairment effect of food color exposure: upregulation of oxido-neuroinflammatory markers and acetyl-cholinestrase activity in the prefrontal cortex and hippocampus

Author:
Wopara, Iheanyichukwu; Modo, Emmanuel U.; Adebayo, Olusegun G.; Mobisson, Samuel K.; Nwigwe, Jovita O.; Ogbu, Prince I.; Nwankwo, Vincent U.; Ejeawa, Constance U.
Source:
Heliyon 2021 v.7 no.3 pp. e06378
ISSN:
2405-8440
Subject:
acetylcholinesterase; adverse effects; catalase; cognition; color; erythrosine; glutathione; hippocampus; malondialdehyde; memory; memory disorders; metabolites; nitrites; prefrontal cortex; tartrazine; tumor necrosis factor-alpha
Abstract:
... Erythrosine and tartrazine are one of the synthetic azo dye mostly consumed in food, drugs and other industrial compounds. This study was designed to investigate the adverse effect of combine erythrosine and tartrazine on cognitive and neurobehavioral functions, pro-oxidants, endogenous antioxidants, cholinergic system and pro-inflammatory cytokines in rats.Erythrosine and tartrazine (2 mg/kg, 6 m ...
DOI:
10.1016/j.heliyon.2021.e06378