bluuebunny/crossref_metadata_2025_split huggingface dataset:
Size effect on the compressive mechanical properties of pearl with “brick-mortar” structure
Authors: Qiu Tian , Liang Lihong 
Published: June 2023

Abstract
The size dependence of four different diameters of pearls with “brick-mortar” structure was studied by uniaxial compression experiments. The results show that the failure of pearls with different diameters under the compressive load is not complete brittleness, but has a certain toughness. The maximum failure load and compressive strength of pearls cannot be considered as constants, which have a significant size dependence. The maximum failure load increases with the increase of pearl diameter, and the compressive strength decreases with the increase of pearl diameter. In addition, the compressive strength of pearls with different diameters conforms to the Weibull statistical law. When the compression fracture probability is 50%, the compressive strength of pearls with different diameters shows a significant size effect, and pearls with smaller diameters have greater compressive strength.
Study on Fundamental Force of Extreme Wave on Complex Deepwater Jacket
Authors: Yi Jianjun , Zou Guoliang , Qin Pingshan 
Published: June 2023

Abstract
With the development of offshore wind power to the far-reaching sea, jacket foundation suitable for 10 ~ 60m water depth has become a development trend. The maximum waves in the far-reaching sea are generated by typhoons. The South China Sea spans the tropics and subtropics. Tropical cyclones therein are extremely active due to the features of its marine environment, like wide water-depth profile, complex topography and hydrology. Especially in recent years, under the development situation of global warming, extreme weather events have increased significantly, and strong and super typhoons have become more frequent. The extreme waves generated by them have a huge force on the jacket, affecting the safety of the project. In this paper, the relevant parameters of PMTC are calculated with the statistical method, the verified SWAN model is used to calculate the probable maximum typhoon wave, and the P-III frequency analysis on the extrapolated results of all typhoon waves are carried out by direction to obtain the design wave elements of each return period, and various extreme typhoon wave characteristic parameters were counted. Secondly, the Morison formula is used to calculate the wave force acting on the offshore fan jacket. This wave force based on different water depth and different directions is tested by physical model test. Finally, the results of model test and theoretical calculation are compared and analyzed to confirm that there is a certain correlation between the two wave forces. This empirical formula can be used to correct the calculated value of Morison formula in practical engineering design, which not only provides a simple and convenient calculation method for practical engineering design, but also provides a reference for the calculation model of the total force generalization of deep-sea complex structure foundation, which has certain theoretical value and practical significance.
Experimental Study on Flexural Behavior of the Composite Bottom Slab of the Stiffened Steel Truss
Authors: Zhang Jindan , Chen Junlin , Ye Xiaogang , Qiu Xiuli , Deng Lijiao , Su Ying 
Published: June 2023

Abstract
In order to study the influence of rib size on the flexural performance of the new reinforced truss concrete composite floor slab, two precast reinforced concrete floor slabs and one ordinary reinforced truss composite floor slab were designed and manufactured for flexural performance tests. The failure mode of the concrete slab under uniform load was analyzed, and the influence of rib size on the flexural capacity of the floor slab was studied. The results show that the stiffening of the steel truss composite slab can significantly improve the stiffness of the precast slab and effectively solve the problem of excessive deflection of the precast slab during construction. On the basis of the experimental study, the influence of the top chord steel bar diameter, concrete rib height and rib width on the short-term stiffness of the floor is deeply analyzed by using the finite element refined modeling. The results show that the diameter of the top chord reinforcement and the width of the concrete rib are positively related to the stiffness of the composite slab, and the height of the concrete rib has little effect on the initial stiffness of the precast slab, which mainly plays a role in the later stage.
Evaluation of Fatigue Properties of Mixed Asphalt Based on Linear Amplitude Scanning Test
Authors: Shen Shun , Liu Fuming , Su Heng , Peng Jiayuan 
Published: June 2023

Abstract
In order to study the effects of asphalt regenerators on the fatigue properties of mixed asphalt, linear amplitude scanning (LAS) test was designed and four types of regenerators (non-petroleum regenerators NRA and NRB, petroleum regenerators PR and bio-oil based regenerators BR) were mixed. The VECD theory analysis method was used to evaluate the miscible asphalt with different regeneration agents, different new asphalt and different old asphalt. The results showed that: In the process of asphalt regeneration, the peak value of the stress-strain curve will move to the lower right corner. The fatigue factor in the fatigue damage curve decreases slowly with the increase of the internal damage coefficient as the degree of asphalt aging increases. The stress sensitivity of SBS modified asphalt is lower than that of matrix asphalt, and the strain range of LAS test involving modified asphalt needs to be expanded. It can be seen that NRA is the best, BR is the second, NRA and PR are poor.
Influence of homogenization degree on microstructure and mechanical properties for a novel wrought superalloy
Authors: Li X X , Jia C L , Yu A 
Published: June 2023

Abstract
The present work aims at investigating the impact of homogenization time on microstructure and mechanical properties of a Ni-based superalloy GH4151 during hot deformation. The results showed that dense dendrite structure remained after homogenization at 1200°C for 5 h, which was similar to as-cast microstructure. Higher flow stress and cracking in 5 h-homogenized material is attributed to the integral deformation of microstructure with greater resistance and less recrystallization. Furthermore, the decrease in dense dendrite structure with increasing homogenization time helped to promote dynamic recrystallization (DRX) during deformation at 1200°C for 12h and 36 h due to increasing nucleation position. When the homogenization time increased to 60h, increase of grain size makes dislocation gather within grain and resistance increase.
Effect of cooling rates on thermoplasticity during hot deformation for a new wrought superalloy
Authors: Li X X , Jia C L , Yu A 
Published: June 2023

Abstract
The effect of cooling rate on thermoplasticity of ni base superalloy GH4151 during thermal deformation was studied. Several different treatments were used to obtain γ′ phases of different sizes and shapes. The hot tensile and hot compression tests were carried out, and the microstructure was studied in detail by scanning electron microscopy and transmission electron microscopy to determine the microscopic mechanism. The results show that the volume fraction of large γ’ phase increased with decreasing cooling rate. The slowly cooled material exhibits lower resistance to deformation due to more obvious softening behavior. The sample with slow cooling contains coarse γ′ phase and broaden γ-γ’ channel. The locations around broaden γ-γ’ channel were accumulated during deformation, which caused a high level of stored energy, and thus dynamic recrystallization (DRX) is promoted, and obvious softening behavior was displayed.
Experimental Study on Time - Varying Law of Resistivity of Concrete Sulphuric Acid Corrosion
Authors: Yu Yan , Lin Mingqiang , Dai Fengjuan 
Published: June 2023

Abstract
The change of concrete resistivity reflects the change of concrete porosity. The variation law of concrete resistivity within the age range of concrete is studied, and the effects of water binder ratio and fly ash content on concrete resistivity are studied. The change law of resistivity of concrete sulfuric acid corrosion was studied. The results show that the resistivity of concrete increases gradually with the increase of age. With the increase of water binder ratio and fly ash content, the resistivity increases with age. With the increase of sulfuric acid corrosion time, the concrete resistivity decreases gradually. With the decrease of sulfuric acid pH value, fly ash content and water binder ratio, the reduction range of concrete resistivity increases.
Mechanical Properties of Polymer Modified Concrete with Steel Fiber
Authors: Li Shuai , Liang Lihong , Li Huanyu 
Published: June 2023

Abstract
For the concrete used in highway, bridge and other structures, the problems such as the premature failure of the surface material and the failure of the interface between the surface course and the base course have not been solved, and the research at home and abroad mainly focuses on the strength and durability of concrete. It is also considered that polymer modified concrete and fiber reinforced concrete can improve the strength and toughness of concrete. This paper mainly studies the compressive and flexural properties of polymer modified fiber reinforced concrete. The experiment found that the mix design of styrene butadiene lotion modified steel fiber reinforced concrete proposed in this paper was reasonable, and the flexural strength at the age of 3 days reached 6.321Mpa, which was 16.9% higher than that of plain concrete; based on the plastic damage model (CDP) theory of concrete, the constitutive model of polymer modified fiber reinforced concrete is established, and the cubic concrete model is simulated under uniaxial compression, and the influence of concrete mortar with different strength substrates on the stress-strain field of uniaxial compression simulation is further analyzed.
Li2WO4 Composite Ba3Ti4Nb4O21 Microwave Dielectric Ceramics with Near-Zero Temperature Coefficient and Low-Temperature Sintering for 5G Communication Devices
Authors: Wu Xiaohui , Su Hua 
Published: June 2023

Abstract
In order to solve the problem of device miniaturization, it is urgent to develop high performance medium K materials. A series of (1-x) Ba3Ti4Nb4O21-x Li2WO4 ceramics (1-xBTN-xLW, x=12, 15, 17 and 20 mol%) were fabricated by soild-state reaction method. Li2WO4 as the effective sintering aids (~640°C) not only promoted ceramic densification and also decreased the temperature to 925°C. Among them, the 0.83BTN-0.17LW ceramic achieved best microwave performance with ε
r~21.85, Q×f~10534 GHz, τ
f
∼-7.78 ppm/°C. Especially, the second phase BaWO4 played major factor on microwave performance, making high K materials transfer into medium K materials and decrease the loss. More encouragingly, the temperature coefficient τ
f
was near zero. The above outstanding results signified that the 0.83BTN-0.17LW ceramic was expected to be a candidate material for LTCC miniaturized devices.
The Strength Behavior of O-Core Sandwich Pipe
Authors: An Tongtong , Redzuan Norizah , Jiang X.X. , Yuan Yongguang 
Published: June 2023

Abstract
Due to the characteristics of light weight, high specific strength, high specific stiffness and multi-function, sandwich structure is widely used in automotive industry, aerospace, offshore platform, construction, wind power generation and other fields. In recent years, the preparation and properties of new high-performance sandwich structures are the frontier research topics in the field of materials engineering. The research on the preparation method and mechanical properties of the sandwich pipes is favored by researchers at home and abroad. This paper, the O-core metal sandwich pipes is taken as the research object. The material is 304 stainless steel. By designing the orthogonal experiment, the sandwich pipes with 3 core pipes and 4 core pipes is prepared by laser welding. The tensile test of the sandwich pipes was carried out by Z250SNS electronic universal testing machine. At the same time, the finite element model of the sandwich pipes was established by using ANSYS finite element analysis software, and the strength of the sandwich pipes was further numerically simulated. Results show that the curves of the simulation and experiment data are in good agreement. Besides, when compare with an empty pipe, the carrying capacity of the sandwich pipe during stretching is significantly improved. The number of cores has a visible effect on the strength of the sandwich structure pipe, and the elastic limit is approximately proportional to the number of cores. In this paper, the mechanical properties of O-core metal sandwich pipe are studied, and the research method is clarified, which provides a new idea for the future research of sandwich pipe.
Spatial Damage Identification of 3D Structures based on Wavelet-Sparrow Search Algorithm
Authors: Kuang Jiaqi , Guan Deqing , Pan Xianwu 
Published: June 2023

Abstract
Based on the singularity principle of the wavelet transform, the continuous wavelet transform is applied to the strain mode of the damaged structure, and the data is normalised and coupled to each 3D position in space. The modal maxima of the wavelet coefficients of each layer of data are compared to identify the spatial location of the damage to the complex structure, and then the Sparrow Search Algorithm (SSA) is used to quickly and accurately identify the data and obtain the degree of damage to the structure. In this paper, the proposed method is validated by numerical finite element simulations and experiments on cantilever structures. The results of the study show that the method can be used to solve the 3D spatial damage identification problem in a simple and fast way, which can be used as a reference for structural inspection problems in practical engineering.
Estimation Rice Productivity Based on Vegetation Index Algorithm of Modis MOD13A1 Satellite (Case Study of Lengayang, Kabupaten Pesisir Selatan, SUMBAR-Indonesia)
Authors: Stiyanto E , Putra E G , Yanti D , Asmuti A , Mudrika R , Khairil W 
Published: June 2023

Abstract
Agriculture decision-making is increasingly being based on remote sensing technology. Crop productivity estimation was one application for satellite imagery technology. With each phenology of plant growth, the importance of satellite wave reflection and absorption produces a varied outcome. This study’s objective was to calculate rice productivity for Lengayang District in Pesisir Selatan Regency using satellite imagery. Pre-processing data, analyzing vegetation indexes until an extraction is made, and then creating a working map for field observation and validation are the processes that makeup data processing. The research was divided into numerous phases, beginning with the gathering of data, processing, observation, and data analysis. Cultivation season (CS) I began in February, CS II began in June, and CS III began in September, according to the examination of NDVI data in the Lengayang District over the course of some years. The equation 2916x4 − 8117x3 + 8180.2x2 − 3562.7x + 574.52 can be used to estimate productivity using the NDVI value technique in the Lengayang District. The results of the model reliability test were categorized as being quite satisfactory.
Determination of Shelf Life of Snakehead Fish Dispersion Products (Channa striata) Using the ASLT Method With Arrhenius Model
Authors: Rahmadani R , Bastian F , Tawali AB 
Published: June 2023

Abstract
Snakehead fish dispersion is one of the developments of food products that have fairly high nutritional benefits and serve as a dietary supplement to maintain endurance for adults, and help growth for children. Snakehead fish dispersion products consist of several materials that serve to improve product quality and extend shelf life. Estimation of shelf life in this study using the ASLT method of the Arrhenius model where the product is stored in three different temperatures, room temperature (28°C), temperature 35°C, and temperature 45°C. To calculate the shelf life, it is necessary to carry out several tests so that the main parameters that most influence damage to snakehead fish dispersion products can be determined. The parameters used are acidity, viscosity, and organoleptic levels including color, taste, and aroma. The results of this study point to the aroma as the main parameter because it has the smallest activation energy value compared to other parameters, namely -6672.96 cal/mol. The shelf life of snakehead fish dispersion products is calculated by the equation of reaction order 0 and obtained shelf life for a temperature of 28°C is 2.7 months, at a temperature of 35°C is 2.2 months, and storage at a temperature of 45°C is 1.5 months. The results of this study will be used as additional data in the development of snakehead fish dispersion products. And also become a reference in next research in determining the shelf life of products using the ASLT method with Arrhenius model.
Addition of cinnamon extract in making edible film of sago starch as packaging for lempok durian
Authors: Putri A S , Johan V S , Efendi R 
Published: June 2023

Abstract
The purpose of this study was to obtain the best concentration of cinnamon extract in making edible film of sago starch as lempok durian packaging. This research was conducted experimentally using a completely randomized design (CRD), four treatments, and four replications to obtain 16 experimental units. The treatments used were the concentration of cinnamon extract with P1 (without cinnamon extract), P2 (cinnamon extract 3%), P3 (cinnamon extract 5%), and P4 (cinnamon extract 7%). Observations were made on edible film moisture content and water vapor transmission rate. Observations made on lempok durian that had been coated with edible film with cinnamon extract were free fatty acids, descriptive aroma test, and texture. The data obtained were analyzed statistically with the Analysis Of Variance (ANOVA) test using IBM SPSS Statistics 24 software. If Fcount ≥ Ftable, then continued with Duncan’s New Multiple Range Test (DNMRT) at 5% level. The best treatment in this study was P4 (addition of 7% cinnamon extract) with the criteria of edible film water content 11.87%, water vapor transmission 7.54%. Criteria of lempok durian day 9 free fatty acids 1.55%, aroma descriptive test 1.90 (slightly rancid), and texture descriptive test 1.85 (slightly chewy). The advantage of this research is that the addition of cinnamon extract can extend the shelf life of lempok durian.
Characteristics and Antioxidant Activities of Instant Fish Ball Flour from Tuna Trimmings with Addition of Various Extracts from Natural Ingredients
Authors: Wellyalina  , Aisman  , Abdi  , Syukri Daimon 
Published: June 2023

Abstract
This study aims to determine the chemical characteristics and antioxidant activity of instant fish ball flour from tuna trimmings with the addition of various extracts of natural ingredients. This study used an exploratory method with 4 treatments, namely the addition of purple sweet potato extract, root tuber extract, carrot extract, butterfly pea extract and control. The results obtained were instant fish ball flour has protein content of about 19%, water content of about 8%, fat content of about 3%, ash content of about 1.5% and carbohydrate content of about 67-68% for all treatments. In addition, the fish ball flour obtained also had antioxidant activity of 8.47, 13.87, 25.27, 22.96, 17.64 ppm / 100 ppm for the control treatment, purple sweet potato, beetroot, carrot and butterfly pea, respectively. Overall the fish ball flour obtained has sufficient nutritional value and also functional value that can be used in the manufacture of fish balls.
Enumeration of left braces with additive group 𝐶₄×𝐶₄×𝐶₄
Authors: Ballester-Bolinches A. , Esteban-Romero R. , Pérez-Calabuig V. 
Published: June 2023

We show that the number of isomorphism classes of left braces of order

64
64

with additive group isomorphic to

C
4

×

C
4

×

C
4

C_4\times C_4\times C_4

is

1

515

429

1\,515\,429

.
The sup-norm problem for automorphic cusp forms of 𝑃𝐺𝐿(𝑛,ℤ[𝕚])
Authors: Maga Péter , Zábrádi Gergely 
Published: June 2023

Let

ϕ
\phi

be an

L
2

L^2

-normalized Hecke–Maaß cusp form on the locally symmetric space

X
≔

P
G
L

n

(

Z

[
i
]
)
∖

P
G
L

n

(

C

)

/

P
U

n

X≔\mathrm {PGL}_n(\mathbb {Z}[i])\backslash \mathrm {PGL}_n(\mathbb {C}) / \mathrm {PU}_n

. If

Ω
\Omega

is a compact subset of

X
X

, then we prove the bound

‖
ϕ

|

Ω

‖

∞

≪

Ω

λ

ϕ

n
(
n
−
1
)

/

4
−
δ

\|\phi |_{\Omega }\|_{\infty }\ll _{\Omega } \lambda _{\phi }^{n(n-1)/4-\delta }

for some

δ
>
0

\delta >0

depending only on

n
n

, where

λ

ϕ

\lambda _{\phi }

is the Laplace eigenvalue of

ϕ
\phi

.
NDAs: A Study in Rights, Wrongs, and Civil Recourse
Authors: Ferzan Kimberly Kessler 
Published: June 2023

Abstract
According to John Goldberg and Ben Zipursky (“Goldursky”), there are two central pillars to tort law, pillars that are best explicated by civil recourse theory. Torts are legally recognized wrongs, and the power to seek redress is part of the Lockean bargain. Using the recent question of whether nondisclosure agreements (NDAs) should be permitted, this Article unearths an instability in the kind of normativity upon which Goldursky relies. Specifically, this paper explores how the unenforceability or bans on NDAs premised upon third party harms may presuppose the victim has a duty to rescue these third parties. I begin by revealing the underlying moral relationship at the heart of these potential duties. From there, I explore how these sorts of arguments cannot easily be voiced within the presuppositions of civil recourse theory. Finally, I consider the pressure points within civil recourse theory that could potentially take on board these moral considerations. My bottom line is simple: Whichever way one thinks about NDAs and the duty to rescue, a dilemma is created for Goldursky. There is simply a mismatch between the kind of arguments that one can make about why it would be (in)appropriate to limit the plaintiff’s cause of action and what the underlying content of tort law should be. Ultimately, the kind of normativity that they need to understand the Lockean bargain, as well as the content of and caveats thereto, may require more bite than positive morality.
A problem for counterfactual sufficiency
Authors: Waldrop John William 
Published: June 2023

Abstract
The consequence argument purports to show that determinism is true only if no one has free will. Judgments about whether the argument is sound depend on how one understands locutions of the form ‘p and no one can render p false’. The main interpretation on offer appeals to counterfactual sufficiency: s can render p false just in case there is something s can do such that, were s to do it, p would be false; otherwise, s cannot render p false. Here I show that, in the context of the consequence argument, this interpretation conflicts with widely endorsed principles governing the logic of counterfactuals.