bluuebunny/crossref_metadata_2025_split huggingface dataset:
Finite Element Simulation Analysis of Aluminum Honeycomb Sandwich Plate Penetration of Aircraft Under High-Speed Bird Impact
Authors: Yu Shengjie , Chen Lei , Liu Zherui , Jiang Kaiwen , Zhang Jiaming , Chen Zhe , Zhang Xuguang , Zhao Zheng 
Published: July 2023

Abstract
In the process of flight, the penetration caused by bird strikes will cause a significant decrease in the bearing capacity of the material, or even complete loss, which will lead to the accident of the aircraft. Therefore, it is of great significance to study the mechanical properties of aluminum honeycomb sandwich panels at different angles of high-speed bird impact. In this paper, finite element software is used to numerically analyze the penetration process. In this paper, the impact test of the aluminum honeycomb sandwich panel was carried out at 90°, 75°, 60° and 45° at the speed of 170m/s by using 1.8kg birdshot. Through finite element simulation analysis of the damage process, contact force and energy absorption rate of the aluminum honeycomb sandwich panel, it is found that when the bird projectile penetrates the aluminum honeycomb sandwich plate, the aluminum honeycomb sandwich in the impact center will be seriously deformed, torn and penetrated and failed. The angle of bird impact has a great influence on the peak contact force and the decay rate of contact force, the energy absorption effect increases exponentially with the decrease of the angle.
Study on Waterproof Pulp Molding Products Manufactured by Wet-Parison Spraying Process
Authors: Li Mengyao 
Published: July 2023

AbstractIn order to achieve the waterproof effect, the existing pulp molding products mostly adopt the methods of slurry addition, spraying and lamination. Wet-parison spraying is a new low-energy waterproof pulp molding process. In this paper, waterproof pulp molding products were prepared by wet-parison spraying process, and their water resistance and mechanical properties were tested. Three kinds of waterproof coatings, i.e. nanocellulose coating, vegetable-oil coating and polyurethane coating, were selected to spray the wet-parison surface of pulp molding, and then the pulp molding products were obtained by hot pressing. The results show that the wet-parison spraying method is feasible and affects little pulp molding products. After spraying nanocellulose and polyurethane coatings, the stiffness properties of pulp molding products were improved, and the stiffness properties of pulp molding products sprayed with vegetable-oil coatings were decreased. The water resistance of pulp molding products sprayed with nanocellulose coatings is better than those sprayed with polyurethane coatings and vegetable-oil coatings.
Process research on the preparation of high-purity cobalt chloride by chemical precipitation
Authors: Qiao Pengyi , Tan Chengwen , Yu Xiaodong , Xiong Zishan , Dang Jianwei , Chang Hao 
Published: July 2023

Abstract
As the precursor of high-purity cobalt, the purity of cobalt chloride has an important influence on the properties of the cobalt target prepared subsequently. In recent years, in addition to ion exchange and extraction, chemical precipitation is a promising method for the purification of cobalt chloride. High-purity cobalt chloride was prepared by chemical precipitation with ammonium hydroxide and dimethylglyoxime as precipitants. The purification mechanism of high-purity cobalt chloride and the depletion mechanism of the main element Co were studied. Inductively coupled plasma-mass spectrometry (ICP-MS) and X-ray diffraction (XRD) were used to characterize the ion concentration, precipitate phase, and depletion products of the main element Co in the solution. The results show that the concentration of impurity elements Al, Cu, and Cr in cobalt chloride solution can be reduced to less than 0.5 mg/L and the concentration of Fe can be reduced to less than 2 mg/L after removing impurities with ammonia. When a small amount of hydrogen peroxide is added to the solution, the concentration of impurity Fe can be reduced to less than 0.82ug/L. In an alkaline environment where nickel dimethylglyoxime is generated, the main element Co is mainly depleted in the form of [Co(NH3)5Cl]Cl2.
Study on Dust Explosion of Wheat Starch Inerted by NaHCO3
Authors: Duan Yi , Zhu Shunbing 
Published: July 2023

Abstract
With the aim of researching the inerting effect of NaHCO3 upon the wheat starch dust explosion, the test of explosion pressure was implemented by 20L spherical explosion test system. The results showed that as NaHCO3 mass fraction increased, the maximal explosion pressure and the maximal explosion pressure rise ratio of wheat starch dust decreased gradually. When 70wt% NaHCO3 was added, the maximal explosion pressure and the maximal explosion pressure rise ratio of wheat starch dust lessened by 73.82% as well as 93.88%, separately. The deflagration flame propagation experiment of NaHCO3 inerting wheat starch was implemented inside a device of the improved Hartmann tube. These consequences showed that velocity and length of the deflagration flame propagation of wheat starch decreased gradually as NaHCO3 mass fraction increased. When 15wt% NaHCO3 was added, peak velocity and average velocity of deflagration flame of wheat starch decreased by 95.30% and 89.69%, respectively. When 20wt% NaHCO3 was added, the deflagration of wheat starch could be completely inerted.
A review on octupolar tensors
Authors: Gaeta Giuseppe , Virga Epifanio G 
Published: July 2023

Abstract
In its most restrictive definition, an octupolar tensor is a fully symmetric traceless third-rank tensor in three space dimensions. So great a body of works have been devoted to this specific class of tensors and their physical applications that a review would perhaps be welcome by a number of students. Here, we endeavour to place octupolar tensors into a broader perspective, considering non-vanishing traces and non-fully symmetric tensors as well. A number of general concepts are recalled and applied to either octupolar and higher-rank tensors. As a tool to navigate the diversity of scenarios we envision, we introduce the octupolar potential, a scalar-valued function which can easily be given an instructive geometrical representation. Physical applications are plenty; those to liquid crystal science play a major role here, as they were the original motivation for our interest in the topic of this review.
Closed expressions for one-qubit states of convex roof coherence measures
Authors: Cui Xiao-Dan , Liu C L 
Published: July 2023

Abstract
We study the closed expressions of the convex roof coherence measures for one-qubit states in this paper. We present the analytical expressions for the convex roof coherence measures,

C
f

(
ρ
)

, of one-qubit states with

C
f

(
φ
)
:=
f
(

c
0

2

,

c
1

2

)

(where

|

φ
⟩
=

c
0

|

0
⟩
+

c
1

|

1
⟩

) being convex with respect to the l
1 norm of coherence of ϕ (i.e.

C

l
1

(
φ
)

), such coherence measures including the coherence of formation, the geometric measure of coherence, the coherence concurrence, and the coherence rank. We further present the operational interpretations of these measures. Finally, we present the usefulness of the convex roof coherence measures

C
f

(
φ
)

being non-convex with respect to

C

l
1

(
φ
)

by giving the necessary and sufficient conditions for the transformations

p

φ
1

⊕
(
1
−
p
)

φ
2

→
q

ϕ
1

⊕
(
1
−
q
)

ϕ
2

via incoherent operations, where ϕ

i
, φ

j

(
i
,
j
=
1
,
2
)

are one-qubit pure states and

0
⩽
p
,
q
⩽
1

.
Assessment of the University Campus Metabolism due to Mobility and Outdoor Conditions: Survey and GIS-based Approach
Authors: Chen Austin M. , De León L. , Álvarez V. , Bustamante M. , Rodríguez Z. , Mora D. 
Published: July 2023

Abstract
Higher Education Institutions (HEI) aim to improve the use of resources to impact the university community and its surroundings. Resources usage contributes to the university’s metabolism in the form of ecological footprint, i.e., carbon and water footprint. The assessment of various actions that could improve the university metabolism help achieve campus sustainability, leading to the “Green Campus”. The Campus Dr. VLS of the Technological University of Panama was used as a case study. Therefore, this investigation aims to assess microclimate conditions using Geographic Information Systems (GIS) and a field survey to estimate CO2 emissions. In this preliminary study, the land surface temperature (LST) and the carbon footprint because of internal mobilization only by institutional drives because of high-rank staff members’ mobilization among buildings. Results showed evidence of the pandemic effect due to the absence of students and staff, where significant temperature differences were found in 2019 and 2021 over the campus. Only the internal campus trips produce roughly 0.283 kg CO2eq per trip. This translates into an annual total emission of 9.55 t CO2-eq, corresponding to 0.48 t of CO2eq per driver.
DLSU Initiatives and Challenges: Energy & Climate Change
Authors: Maralit Antonio Carlos M. , Tan Dr. Raymond Girard 
Published: July 2023

Abstract
De La Salle University is committed to reducing its impact on the environment and to promoting positive action that will help reduce its carbon footprint. In its vision-mission, it emphasizes the need to be “attuned to a sustainable earth.” This paper presents the different initiatives and challenges faced by the university, especially while still in a global pandemic. A number of initiatives have been undertaken to promote energy efficiency in campus operations and climate action, particularly regarding reducing greenhouse gas emissions. However, facing the COVID-19 pandemic and preparing campus operations for the gradual resumption of face-to-face classes have presented new challenges moving into the next normal. The need to address health and safety concerns has resulted in increased consumption of electricity. Challenges are experienced particularly in ensuring improved indoor air quality as well as allowing indoor-outdoor air exchange. The setting up of (a) air purifiers and/or additional auxiliary fans in high foot-traffic areas, (b) installation of HEPA filters and UV-C lamps into HVAC systems, (c) extended use of air conditioning units to allow purging of air before and at the end of activities, and (d) the opening of air exchange dampers in the University’s HVAC systems, are all expected to result in increased demand for electricity.
Data-based understanding and optimization of sustainability of university mobility: two case studies
Authors: Scagni Andrea , Maggiolini Micol 
Published: July 2023

Abstract
Recently, Italian universities started to collect data on the mobility choices of their communities, in an effort to move towards more sustainable forms of transport. Two examples will be detailed here. First, to foster a significant shift from car to sustainable transport in commuting, car parking space inside university locations will be allocated using individual “sustainable accessibility” indices favoring people that have real difficulties in adopting more eco-friendly modes of transport. To this end, we harness all available data on public transport services as well as road traffic to assess how fast and comfortable commuting sustainably is compared to traveling by car for any specific individual from home to university. The whole process will be web-based, allowing for fast batch computation of such indices for large numbers of people. Second, since university mobility management includes agreements with suppliers of mobility services (such as sharing), offering incentives for their use, we try to shape such agreements based on a community consultation to determine what are the sharing services subscription arrangements most appealing to interested users, thus maximizing their potential.
Wastewater to Wetlands: Turning the Tide with Azolla Ferns
Authors: Kamaleddine F , Keniar I , Yanni S.F. , Elhusseini R , Mohtar R 
Published: July 2023

Abstract
Water pollution is a major problem exacerbated by untreated wastewater discharged into the environment, leading to eutrophication and algal blooms. This research at the American University of Beirut explores the potential of using Azolla pinnata, an aquatic fern, to rid wastewater from ammonium (NH4-N) and soluble reactive phosphorus (SRP), which are the main contributors to eutrophication. A controlled phytoremediation experiment conducted at the Advancing Research and Enabling Communities (AREC) center in the Bekaa valley showed that A. pinnata can decrease NH4-N and SRP in the primary treated wastewater by 98.2% and 96.4% respectively, within 20 days. The color and odor of treated wastewater reverted to the characteristics of fresh water, making this recycling method highly sustainable due to its relatively low cost. The prospective project would be scaled to the university’s farm level by constructing artificial wetlands at AREC using wastewater generated by the farm facilities. The harvested Azolla can be used as animal feed and/or as a green fertilizer. Successfully reintroducing the precarious wetlands in that arid region would alleviate the stress on aquifers and replenish many endemic species currently on their way to extinction. As a result, the university would be treating its wastewater in a sustainable way while contributing to greening the landscape slowly transfigured by desertification.
Integrating technology to develop renewable energy to explore a sustainable future for Taiwan by the SECRDC in NPUST
Authors: Hsu Uzu-Kuei , Tai Chang-Hsien , Yeh Kuei-Jyum , Long Way 
Published: July 2023

Abstract
To keep the next generation safe from the energy depletion crisis and slow the impact of climate change. The world is accelerating the energy transition with the goal of net zero emissions. National Pingtung University of Science and Technology / NPUST established a Sustainable Circular Economy R&D Center / SCERDC. To develop innovative technologies and combine green energy applications across fields for the waste materials, waste recycling and energy saving and carbon reduction of agriculture, forestry, fishery and animal husbandry. Add more strength to “circular economy” and “sustainable environment”.
The architecture of green space by medicinal plants in the university and its impact on people’s ealth, education and environmental in the Post-Pandemic Time
Authors: Mohebi Zahra , Ebadi Hadi 
Published: July 2023

Abstract
Medicinal plants have played an essential role in human healthcare as essential ingredients in traditional medicines and the combination of novel drugs. The architecture of the green space in the university is mainly aimed at the cultivation of plant species that have an eye-catching application. But the green space including medicinal plants in the university space has both effects on the physical and mental health of people and has a good view. It can also be used for teaching students. Therefore, the architectural style of successful herbal botanical gardens needs to reflect a broad understanding of botany and encourage creative thinking in garden design and interpretation. Medicinal Plants gardens are more than just a “pleasant place to visit” because of their unique combination of resources, and it offers a unique opportunity to use plants for human well-being. As a result, the architectural design of the garden may have an impact on its performance. The purpose of this article is to describe the effect of medicinal plants on people’s health and education, as well as their architectural design in universities.
Transforming the University into an Environmental Space
Authors: Carmo Andréa de Araújo do , Santos Kelly Fernanda de Sousa 
Published: July 2023

Abstract
The Environmental Management Superintendence of the Maranhão State University, which works its Environmental Management System through the Environmental Agenda in Public Administration, education for sustainability is being developed continuously and based on A3P since 2015, in all its six axes. In the axis, Awareness and Training of Servants, the opportunity arises to raise awareness environmental issues not only the academic community, but also society as a whole. Through the development of the Green Room Circuit Project, which has been under development since 2018 at the university, the objective was to describe the actions carried out in the year 2021 and to analyze the environmental perceptions of the public after remotely participating in the Green Room Circuit at the Paulo VI Campus. The Circuit consists of five dynamic and successive stages, where lectures corresponding to the contents that would be worked on in each stage were remotely applied. In 2021, due to the pandemic, the Green Room Circuit returned to activities in May, remotely. Fourteen circuits were carried out during the period from May to December, between the different levels of education, 29% of the elementary level, 64% of the secondary level and 7% of the technical level. The activities developed were thematic lectures on: composting, sustainable actions, fungi, agroecological trails, conservation of snakes, mammals and endangered animals. From the public, 580 visitors participated, being 97% students and 3% teachers. The Green Room Circuit on the Paulo VI Campus, education schools in the state of Maranhão has gained an alternative place to know and experience environmental education in an articulated way beyond the classroom, as well as, in the approximation and interaction between basic and higher education system.
Millennials in Slums: Housing Career Approach Towards Livable Housing in Muja-Muju Urban Village, Yogyakarta City, Indonesia
Authors: Suryaningsih A D , Sunarti S 
Published: July 2023

Abstract
The millennial generation (born 1982-2000) who currently dominates the population has a tendency to have diverse housing needs. However, the unaffordability of housing can create problems, such as inadequate housing. This phenomenon occurs in the slum area of Muja-Muju Urban Village. Based on these problems, this study aims to determine the housing preferences of millennials in the slum area of Muja-Muju Urban Village towards livable housing through a housing career approach. This study adopted a quantitative method with frequency distribution and comparative descriptive analysis by comparing the housing conditions based on indicators also considered the millenial preferences. Data was collected by distributing questionnaires directly to 109 respondents and observation. The results showed that the housing career pattern during the life cycle tends to stagnate. Besides, the average existing land plots/buildings were only 37-48 m2 and 43.2% exceeds the standard residential capacity. There were 55.6% of the millennials chose to live in existing housing because of its strategic location. Referring to the housing career characteristics, the millennial generation cannot afford livable housing in other areas which can lead to irregular buildings due to high density. This condition has not been investigated in previous studies, so the results are important for preventing the return of slums.
Antioxidant Activity of Sappan Wood Extract (Caesalpinia sappan L.) As An Adjuvant and Substitution in Blood Serum of Rats (Rattus norvegicus) Iron Overload Model
Authors: Firdawati N , Kuntana Y P , Ghozali M , Utama G L , Panigoro R , Safitri R 
Published: July 2023

AbstractSappan (Caesalpinia sappan, L.) contains various antioxidant compounds such as brazilin and flavonoids that able to reduce superoxide anion radicals, reduce hydroxyl free radicals and chelate iron ions. This study aims to obtain the antioxidant activity of sappan wood extract which is given adjuvantly and substitution in blood serum of overload iron model rats. The research method used is experimental laboratory with a completely randomized design. The test animals were used 70 male rats aged 7 weeks weighing 200 grams and divided into normal, negative control, comparison, and experimental group. The adjuvant group used sappan wood extract at doses of 50, 100, 150, and 200 mg/kgBW. The subtitution group administred various percentages (25%, 50%, 75%, and 100%) of the sappan wood extract dose of 200 mg/kgBW. Data obtainedwere analyzed using one way ANOVA and Duncan’s test at 95% confidence level. The results showed that the administration of sappanwood extract at a dose of 50 mg/kg BW as an adjuvant and a dose of 200 mg/kg BW (100%) by substitution could provide better antioxidant activity against iron-excessed rat blood serum. This can be seen from the decreased activity of SOD, and levels of MDA and increased activity of GPX.
A review article effect of immersion Curcuma xanthorriza Roxb. extract for the survival of goldfish seed (Cyprinus carpio L.) after being infected with Aeromonas hydrophila
Authors: Saefudin  , Safitri Ratu , Handayani Tri 
Published: July 2023

AbstractLong-term and inappropriate use of antibiotics can negatively impact goldfish seeds (Cyprinus carpioL.), which are affected byMotile Aeromonas Septicemia. One of the prevention efforts is the utilization of immunostimulants from natural ingredients such asCurcuma xanthorrhizaRoxb.Curcuma xanthorrhizacontains active substances in the form of curcuminoids, terpenoids, and essential oils that provide antibacterial activity with varying strength depending on the levels of components in the rhizome. This review article aims to provide scientific information regarding the effect of immersion time and the best concentration for the viability of goldfish seeds after being infected withAeromonas hydrophila. The research method was experimental, using a factorial, Completely Randomized Design with several replications. Based on the results of the literature study thatCurcuma xanthorrizaRoxb. extract was known to utilization with a concentration of 0.6 g/l by injection ofAeromonas hydrophila108cfu/mL gave the best effect on viability, which 100% absolute weight growth of 12.48 g/head and daily growth rate of 2.39%. The conclusion is a concentration of 0.6 g/l ofCurcuma xanthorrizaRoxb. extract had the best effect on viability so that it has the potential as an alternative natural antimicrobial.
Effective enhancement of poly(bisphenol-A carbonate) crystallinity with polyamide-66 ionized nucleation through ion-dipole interactions coupled with plasticization
Authors: Zhang Hui , Song Zhiyuan , Yu Yang , Zeng Zheng , Cen Hongyu , Zheng Xuan , Hu Tao , Gong Xinghou , Wu Chonggang 
Published: July 2023

Abstract
To improve the crystallinity of poly(bisphenol-A carbonate) (PC). Polyamide-66 (PA-66) is ionized by CaCl2 to prepare the various degrees of ionization (DIs) of PA-66 ionenes (CaCl2–PA-66) as nucleating agents to co-modify PC with cholesterol nonanoate (CN) as plasticizers. Compared with non-ionized PA-66, CaCl2–PA-66 enhance the crystallinity of PC. Concretely, with the DI of CaCl2–PA-66 is raised from 0 to 37.2 mol%, the crystallinity of PC/CN/CaCl2–PA-66 (90/5/5 w/w/w) is first increased from 19.2% to 31.5% and then decreased to 16.9%. This is attributed to the stronger ion-dipole interactions between the ionized nucleating agents and PC, which enhance the compatibility and further dispersibility to create finer crystal with a denser distribution, and the nucleation efficiency is elevated thus facilitating the PC crystallization. However, when the DI of CaCl2–PA-66 is overly high (≥11.4 mol%), it leads to excessive ionic crosslinking, which reduces dispersibility and nucleation efficiency. Therefore, the modification of PC with a suitable DI of CaCl2–PA-66 can advance its crystallinity, which is a novel and effective approach.