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All Journal HAYATI Journal of Biosciences Civil Engineering Journal Journal of Humanities and Social Science (JHASS) Media of Health Research
Wei Zhang
University of Science & Technology Beijing
Agriculture, Biological Sciences & Forestry Arts Civil Engineering, Building, Construction & Architecture Dentistry Earth & Planetary Sciences Education Health Professions Languange, Linguistic, Communication & Media Medicine & Pharmacology Nursing Public Health Social Sciences Veterinary

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 1 
Experimental Study of a Gas Engine-driven Heat Pump System for Space Heating and Cooling Zhang, Wei; Yang, Xianzhao; Wang, Tao; Peng, Xueyuan; Wang, Xiaolin
Civil Engineering Journal Vol 5, No 10 (2019): October
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/cej-2019-03091411

Abstract

In this paper, the performance of a gas engine-driven heat pump (GEHP) was experimentally studied for space heating and cooling. An experimental test facility was developed for this purpose. The effect of key parameters on system performance was investigated under both cooling and heating modes. The results showed that as the engine speed increased from 1400 to 2000 rpm, the cooling and heating capacities increased by 23% and 28.5%, respectively while the GEHP system Primary Energy Ratio (PER) decreased by 13.5% and 11.7% in the cooling and heating modes, respectively. The system PER in the cooling mode was found lower than that in the heating mode. This indicated that heat recovery from the engine cylinder and exhaust gas was very important for improving the GEHP system performance. In the heating mode, the ambient temperature and condenser water flow rate had a large effect on the system heating capacity and PER, and insignificant effect on the gas energy input. In the cooling mode, the chilled water inlet temperature showed a large effect on both cooling capacity and gas energy input while the chilled water flow rate had a large effect on cooling capacity and insignificant effect on the gas energy input.
Exploring Indonesian Sponge-Associated Marine Aspergillus hortai: Characterization of Bioactive Compounds with Potential Anti-Escherichia coli Properties Fadillah, Wendi Nurul; Sukarno, Nampiah; Iswantini, Dyah; Rahminiwati, Min; Franco, Christopher MM; Zhang, Wei; Hanif, Novriyandi; Waite, Mashuri
HAYATI Journal of Biosciences Vol. 31 No. 4 (2024): July 2024
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.31.4.712-724

Abstract

Sponge-associated marine fungi are potential source for secondary metabolite compounds. The aim of this research was to investigate sponge-associated marine fungus as secondary metabolite producers against Escherichia coli. The fungus was isolated from Indonesian marine sponge Stylissa sp. and identified as Aspergillus hortai through a combination of morphological and molecular characteristics of ITS DNA and β-tubulin genes. The fungus was tested against E. coli using fungal broth and mycelial extracts. The optimized condition was achieved by fungal broth grown in corn meal broth at 6-days of shaking incubation. Fungal extract was produced using three liters of filtered fungal broth and extracted in ethyl acetate. The antibiotic activity of the extract is vulnerable to 45°C heat and basic or acidic conditions. Therefore, the extraction was done at pH 7 with evaporation at 40°C. The extract shows 7 major bands on TLC with 1 band shows activity against E. coli (Rf 0.81) on bioautogram. The band was observed as a yellow color and turned black in short-wave UV and did not show any fluorescence in long-wave UV. This research shows that sponge-associated marine fungi obtained from Indonesia has the potential as anti E. coli worth to be explored for searching new antibiotics.
The Impact of High Ultra-Processed Food Consumption on Obesity Risk among Young Adults Putri, Anisa; Zhang, Wei
Media of Health Research Vol. 3 No. 3 (2025): Media of Health Research, December 2025
Publisher : Lembaga Publikasi Ilmiah Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/mohr.v3i3.317

Abstract

Ultra-processed foods (UPFs) are industrial formulations characterized by high levels of added sugar, fat, sodium, and food additives, and have become a dominant component of modern diets. Recent evidence suggests that increased UPF consumption is strongly linked to obesity and other metabolic disorders. This study aims to investigate the impact of high UPF consumption on obesity risk among young adults. A cross-sectional study was conducted involving 320 participants aged 18–30 years in Yogyakarta, Indonesia, and Shanghai, China. Dietary intake was assessed using a validated food frequency questionnaire and categorized based on the NOVA classification system. Body mass index (BMI) was measured and obesity was defined according to WHO standards. Logistic regression analysis was applied to examine the association between UPF consumption and obesity risk. The findings revealed that individuals with the highest tertile of UPF consumption had a 2.6-fold increased risk of obesity compared to those in the lowest tertile (OR=2.63; 95% CI: 1.55–4.47, p<0.01). Frequent consumption of sugar-sweetened beverages and packaged snacks were the strongest predictors of obesity. These results emphasize the urgent need for dietary interventions and public health strategies to reduce UPF consumption among young adults. This research contributes to existing evidence by providing cross-country data from Indonesia and China, highlighting the global relevance of dietary patterns and obesity prevention strategies.
Modernization and Cultural Identity in Contemporary China Yang, Suhuai; Song, Chao; Kwan, Hongmei; Zhang, Wei
Journal of Humanities and Social Sciences (JHASS) Vol 7 No 3: December 2025
Publisher : Lamintang Education and Training Centre, in collaboration with the International Association of Educators, Scientists, Technologists, and Engineers (IA-ESTE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36079/lamintang.jhass-0703.924

Abstract

Over the past four decades, China has undergone a rapid and comprehensive modernization process, transforming the country's economic, social, and cultural structures. This transformation reflects not only economic growth and technological innovation but also tensions between tradition and modernity in cultural identity. This study highlights how modernization shapes the cultural identities of China's urban youth through a qualitative approach, combining digital discourse analysis and in-depth interviews. Furthermore, it examines China's civilizational diplomacy as a global strategy that combines cultural hegemony, soft power, and epistemic challenges to the Western order. Using the A-DUNK framework, the study identifies three main findings: first, civilizational diplomacy displays a duality between inclusive dialogue and the centrality of Cynical morality; second, China's soft power is built through moral legitimacy that emphasizes historical continuity and civilizing values; and third, this diplomacy presents epistemic challenges that emphasize relationality and coexistence among civilizations. The discussion shows that China's approach aligns with civilizational pluralism, yet still faces tensions between inclusive rhetoric and asymmetrical practices. Normatively, the success of China's civilizational diplomacy hinges on its ability to institutionalize ethical reciprocity, transforming moral discourse into an inclusive procedural mechanism. This study contributes to an interdisciplinary understanding of Chinese modernization and diplomacy as phenomena that are not only geopolitical but also normative and epistemic, offering a model of "civilizational relationalism" that emphasizes the co-construction of meaning, legitimacy, and world order in the era of post-Western globalization. These findings open up opportunities for further research on cross-cultural reception, comparisons with other emerging powers, and the long-term evolution of civilizational diplomacy narratives.
Co-Authors Anisa Putri Dyah Iswantini Fadillah, Wendi Nurul Franco, Christopher MM Kwan, Hongmei Nampiah Sukarno Novriyandi Hanif Peng, Xueyuan Rahminiwati, Min Song, Chao Waite, Mashuri Wang, Tao Wang, Xiaolin Yang, Suhuai Yang, Xianzhao