Journal of Hunan University Natural Sciences

The Journal of Hunan University Natural Sciences is the leading Chinese academic journal that publishes articles in all areas of natural sciences. The Journal is meant to serve as a means of communication and discussion of important issues related to science and scientific activities. The Journal publishes only original articles in English which have international importance. In addition to full-length research articles, the Journal publishes review articles. Papers can be focused on fundamental research leading to new methods, or adaptation of existing methods for new applications.

Articles for the Journal are peer-reviewed by third-party reviewers who are selected from among specialists in the subject matter of peer-reviewed materials.

The Journal of Hunan University Natural Sciences is a kind of forum for discussing issues and problems facing science and scholars, as well as an effective means of interaction between the members of the academic community. The Journal of Hunan University Natural Sciences is read bya large number of scholars, and the circulation of the journal is constantly growing.

The Journal of Hunan University Natural Sciences publishes special issues on various and relevant topics of interest to the scientific community.

The Journal of Hunan University Natural Sciences is indexed by Web of Science, Scopus, Current Contents, Geobase and Chemical Abstracts.

 

Articles containing fundamental or applied scientific results in all areas of the natural sciences are accepted for consideration.

The Editorial Board of the Journal of Hunan University Natural Sciences is composed of 25 members and is chaired by Academician Chen Zhengqing. Editor-in-chief is Prof. Yi Weijian.

 

Frequency of publication: monthly

ISSN: 1674-2974

Access to all articles on the website is open, does not require registration or payment.

Journal articles are licensed under the CC BY 4.0 Creative Commons Attribution 4.0 License.

The Journal of Hunan University Natural Sciences takes care of maintaining electronic versions of articles. Data safety is ensured by backing up digital data in accordance with internal regulations. Logical and physical data migration is also provided. Cloud technologies are applied.


For further information, please contact:

E-mail: editorial-office@jonuns.com

Address: Lushan Road (S), Yuelu District, Changsha, Hunan Province, Zip Code: 410082 (Editorial Department of Journal)


Paper Submission 

Announcements

 

Submission open for Volume 49, Issue 9, September, 2022.

Dear Authors,

Please submit your manuscripts through our Online Submission System or directly to the Chief -Editor's e-mail editorial-office@jonuns.com.
Deadline:  September 30, 2022.

Journal of Hunan University Natural Sciences is an international, peer-reviewed open - access journal on all aspects of natural sciences published monthly online.
Manuscripts are peer-reviewed. The first decision is given to authors about 20-30 days after submission; acceptance for publication after revisions is done within seven days.
Aims
Journal of Hunan University Natural Sciences provides an advanced forum on all aspects of natural sciences. It publishes reviews, research papers, and communications. We aim to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that everyone can reproduce the results. Electronic files and software regarding the full details of the calculation or experimental procedure can be deposited as supplementary electronic material if unable to be published in a normal way.

Scope
The journal covers physics, chemistry, engineering, environmental, earth sciences and biology.

Sections:
•    Biosciences and Bioengineering;
•    Computer and Information Science;
•    Chemistry;
•    Earth-Aerospace-Marine Science;
•    Electrical and Electronic Engineering;
•    Education;
•    Engineering;
•    Energy;
•    Environmental Sciences;
•    Economy;
•    Finance;
•    Materials Science;
•    Mathematics;
•    Medicine;
•    Neurosciences ;
•    Physics;
•    Pharmaceuticals.


The authors should prepare the articles strictly according to the template. Please check the link http://jonuns.com/docs/template.doc.

All articles published in are published in full open access. In order to provide free access to readers, and to cover the costs of peer review, copyediting, typesetting, long-term archiving, and journal management, an article processing charge (APC) of EUR 430 applies to papers accepted after peer - review.
Submitted papers should be well formatted and use good English. Authors may use our English editing service (EUR 70-100) prior to publication or during author revisions. The articles that native English speakers do not edit are not allowed for publication.
The journal publishes articles in English or Chinese.
Articles published in the Journal of Hunan University Natural Sciences will be Open-Access articles distributed under the terms and conditions of the Creative Commons Attribution License (CC BY). The copyright is retained by the author(s).
Posted: 2022-07-16 More...
 
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Last Research Articles

The Saguling dam is built on the cascade system of the Citarum river. The Saguling dam is located upstream of the system over the Cirata and Jatiluhur dams. Besides having the many benefits (irrigation, recreation, flood control, water storage, etc.), the Saguling dam saves the risk of big dangers in the case of the failure. The general failure or dam break reason of the Saguling dam can happen due to the internal and external factors. The internal factor is an occurrence of breach in the dam body that causes the process of piping in the top, center and low part of the dam body. Another internal factor is the mal-function of the spillway if the water discharge is too much. The external factor is the big flood discharge that can cause the overtopping. This research intends to conduct the simulation of dam failure or dam breaks in the Saguling dam. The methodology consists of data collection for the material of dam break analysis 2D like hydrology data, digital map, and technical data of dam. Then, the collected data was analyzed using the HEC-RAS software. Considering the possibilities of failure risk of Saguling dam, the simulation analysis of dam failure or dam break was performed for some scenarios and their impacts on the downstream part of the dam. The results show that the Saguling dam with the overtopping scenario has the worse impact than the piping scenario with the maximal inundation area and the possibility area of 19.39 km2. The simulation of the Saguling dam failure or dam break produces the flood discharge whose flow will reach the Cirata reservoir in 3 hours.

 

Keywords: dam, failure, dam break, simulation, piping, overtopping.

 

https://doi.org/10.55463/issn.1674-2974.49.8.29

Tri Nugroho Waskito, M. Bisri, Lily Montarcih Limantara, Widandi Soetopo
2022-10-04
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This paper considers fifth-order boundary value problems with two-point boundary conditions. For the investigation, first, the Adomian decomposition method (ADM) was applied to the equation and then the homotopy perturbation method (HPM) was used to continue the solution. In addition, this combined method was applied to solve two linear and nonlinear experiments. Then the numerical results obtained by other methods were compared. Furthermore, the convergence of the methods was analyzed. In most of the articles, the HPM is used for equations with initial conditions and the ADM is used for equations with initial and boundary conditions. In this study, a combination of two methods (the ADM and HPM) was used to solve equations with boundary conditions. The results of this combined method are remarkable.

 

Keywords: homotopy perturbation method, Adomian decomposition method, combination, convergence.

 

https://doi.org/10.55463/issn.1674-2974.49.8.28

Seyd Siavash Hosseini, Azim Aminataei, Fatemeh Kiany, Mahmood Alizadeh, Mohsen Zahraei
2022-10-04
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The study aimed to determine how strategic management can help organizations contain the effects of COVID-19 virus spread and maintain high performance and profits during the closing period. This study examined the role of environmental scanning, strategy formulation, strategy implementation, and strategy evaluation as dimensions of strategic management and how it helps in managing the spread of COVID-19. A questionnaire was sent to 146 operations/risk managers in Jordan’s industrial organization sector as part of the quantitative methodology. Primary data screening and analysis was done according to SPSS and other statistical tests including multiple and simple regression, mean and standard deviation, frequency and percentage. It was determined that strategic management contributed to a well-built COVID-19 pandemic management plan with an R value of 721 and a strong correlation coefficient. Additionally, all the variables in the research had a correlation coefficient that ranged from moderate to high. A correlation value R = 0.713 indicated that strategy assessment helped propose a well-built COVID-19 pandemic management. The novelty of the current study focused on the fact that industrial facilities should supply infrastructure and equipment, and prioritize the well-being of their workers, their happiness and involvement in decision-making, as the epidemic spreads. Study advocated learning from other businesses’ experiences to create a clear picture of organizational and managerial strategies during the spread of a pandemic that threatens the lives of people.

 

Keywords: strategic management, COVID-19, quarantine, lockdown, environmental scanning, strategy formulation, strategy implementation, strategy evaluation.

 

https://doi.org/10.55463/issn.1674-2974.49.8.27

Ethar Khalaf Ibrahim Al Humeisat, Moutasem Mahdi Salameh Abushattal
2022-10-04
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In literature, the development of spinal deformities was reported after surgical intervention for congenital heart disease using thoracotomy and sternotomy incisions in children; however, there are not enough data regarding the incidence of spinal kyphosis after open-heart surgery in adults. This study aimed to determine the impact of open-heart surgery using median sternotomy incision on the sagittal plane thoracic spine curve and pulmonary functions after open-heart surgery. A cross- sectional study was conducted on 100 participants (53 ± 9.43 years), who underwent open heart surgery using median sternotomy. The spinal kyphotic curve was evaluated using a Flexicurve ruler and spirometry parameters [forced vital capacity (FVC), forced expiratory volume in the first second (FEV1) and ratio of forced expiratory volume in the first second to forced vital capacity (FEV1/FVC)] were evaluated before and one week after open-heart surgery. The comparison between the preoperative and postoperative measurements of the variables under study was performed using the paired t-test. Statistical significance was set at (P ˂ 0.05). The results revealed a significant increase in the dorsal kyphotic curve (9.75 ± 2.32) and a significant decrease in all spirometry parameters under study [(FVC: 2.12 ± .77); (FEV1:1.55 ± .64) and (FEV1/FVC: 0.72 ± .13)] with an alpha level of (P < 0.05). There is a high incidence of exaggerating the sagittal plane thoracic spine curvature (thoracic kyphosis), and reduction in the pulmonary functions after open-heart surgery using median sternotomy incision.

 

Keywords: open heart surgery, spinal kyphosis, assessment, pulmonary functions.

 

https://doi.org/10.55463/issn.1674-2974.49.8.26

Ali M. Hassan, Mohamed Abdel Bary, Sara M. Mohamed Kamel, Fatma A. Hegazy, Emad A. Aboelnasr, Amany M. Helmy, Ahmed S. Abdelhamid
2022-10-04
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Data obtained from the drive-test in the urban area (a case study of Siliwangi Stadium, Bandung) revealed that the low throughput occurred on the downlink, which was 3.56 Mbps. On the uplink, it was 20.7 Mbps. Additionally, based on the Operating Support System (OSS) data, the site had high resource block usage (80% of PRB usage). It revealed the high traffic volume in the area, which resulted in poor throughput values received by users. The area is one of the potential market areas in the city of Bandung, which is indicated by housing, military area command education and training regiment, schools, hotels, markets, and stadiums. Based on the Site Database (SDB), it was known that the site has not yet implemented the carrier aggregation method. This study evaluated throughput using the Inter-Band Non-Contiguous Carrier Aggregation method by comparing three scenarios: Non-CA, CA Non-Repeater, and CA Repeater. Based on the results of the non-CA simulation, the downlink throughput increased by 23,582 Mbps, and the uplink throughput by 20.098 Mbps. Meanwhile, in the non-repeater CA simulation, the downlink throughput increased by 44.56% to 34.091 Mbps, and the uplink throughput increased by 39.22% to 27.980 Mbps. Furthermore, the CA Repeater simulation increased downlink throughput by 63.70% to 38.603 Mbps and uplink throughput by 45.06% to 29.154 Mbps.

 

Keywords: Carrier Aggregation, LTE Advanced, throughput, urban area.

 

https://doi.org/10.55463/issn.1674-2974.49.8.25

Wahidin, Hasanah Putri, Yanuar Christiary
2022-10-04
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