bluuebunny/crossref_metadata_2025 huggingface dataset:
Effectiveness of Consumption Sechium Edule on Decreasing Blood Pressure in Elderly with Hypertension in Coastal Area
Authors: Fauziningtyas Rista , Ristanto Arvian Cahya Adi , Makhfudli
Published: July 2020

Sechium edule contains flavonoids and potassium to reducing small blood pressure in the elderly with hypertension. The serving of chayote for consumption can be juiced, steamed, and squeezed. However, no research proves from three serving is more effective in reducing the pressure of elderly hypertension. The aims of the study compared from three presentations which is more useful to make blood pressure decrease in elderly with hypertension in coastal area. This study used Pre-Experimental Design with the three-group pre-post-test design. Samples were 51 elderly obtained from purposive sampling. The independent variable was the consumption of Sechium edule with the various presentation. The dependent variable was the blood pressure. Based on analysis data used paired t-test with significance p-value ≤ 0.05. The mean of blood pressure in the juiced group before intervention was 156.28 mmHg and after intervention 152.48 mmHg (decrease 3.8 mmHg). The mean of systolic pressure in steamed group before intervention was 154.46 mmHg and after intervention 151.43 mmHg (decrease 3.03 mmHg). The mean of systolic pressure in squeezed group before intervention 152.51 mmHg and after intervention 152.14 mmHg (decrease 0.37 mmHg). The juiced Sechium edule was most effective to decrease blood pressure in elderly with hypertension. The nurse can promote to the elderly in the coastal area to make juiced Sechium edule as a non-pharmacological intervention for patient with Hypertension.
Yield Performances of Jatropha curcas L. Originating from Multi-entrenched Seedlings through Two Year Production Cycles
Authors: Santoso Bambang Budi , Arya Parwata IGM
Published: July 2020

Jatropha curcas L. is a terminal flowering plant. The use of planting material from the beginning which has many branches (multi-entrenched seedlings) will certainly have the opportunity to provide higher yields, compared to single-stemmed seedlings. Three-month-old multi-entrenched seedlings (b1 = single-stemmed seedlings, b2 = seeds with two branches, b3 = seeds with three branches, and b4 = seeds with four branches) raised in polybags were planted in the field to evaluate the performance of these multi-entrenched seedlings in a Randomized Block Design with three replications, and each treatment consisted of five tree units. The result shows that the use of branched seedlings has a significant effect on the yield of Jatropha started in the first year of cultivation. Seedlings with two entrises were very well multi-entrenched seedlings used, offered seed yield about 408.2 g per tree in the first year, and 1,118.4 g in the second year of cultivation.
Study of Red Dragon Fruit Peel (Hylocereus Polyrhizus) Extract as Natural Food Colorants to Physicochemical Properties Of Pedada’s Jam as Functional Foods
Authors: Nizori Addion , Lamtiar
Published: July 2020

Red dragon fruit peel has a very high of anthocyanin content. Anthocyanin is commonly used as natural colorants in the food industry. This study was to determine the effect red dragon fruit peel extract to physicochemical quality of Pedada’s jam. Research design used was randomized complete design with 6 combination of treatments which are 100%;0%, 90%;20%, 80%;20%, 70%;30%, 60%;40% and 50%;50% of Pedada and red dragon fruit extract respectively with 4 replicates. The results shows Pedada’jam fortified with red dragon fruit extract have a significant effects on pH, moisture content, anthocyanin content, total soluble solids content, antioxidant activity and colour changed. Adding of dragon fruit peel extract 50% have the best results with pH 3,54 moisture content 28,11%, total soluble solids 33,89°Brix, colour index (L*) 49,05 green (a*) -0,30, yellow (b*) +22,09 and antioxidant activity 94,16%.
Preserving Riau’s Malay Culture Through Virtual Environment Application
Authors: Elfizar  , Sukamto  , Fitriansyah A , Sastria G , Erna M
Published: July 2020

Riau Malay culture provides inspiration and guidance for the community. Malay culture that is based on religion provides many guidelines and advice for the community in acting. Unfortunately, the community is difficult to access Riau Malay cultural objects because of separated locations of each district in Riau Province. Additional factors, many Malay cultural objects have been damaged and lost. This research aims to develop a three-dimensional virtual environment application to facilitate community access in knowing and studying Riau’s Malay cultural objects. Starting from the initiation of the environment, making surface contours, creating environmental objects to the addition of cultural objects are the phases carried out in this study. The results of this study indicate that the application is very interesting and able to facilitate public access in knowing and preserving Riau’s Malay culture.
The Importance of Railroad Crossing Doors as Rules of Safety and Environmental Safety: An Overview of Responsibilities
Authors: Ratnawati Elfrida
Published: July 2020

Train accidents often occur on level crossings, due to the absence of a doorstop that restricts any vehicle passing through. This is due to the fact that in addition there is no security of the crossing doorstops, negligence of the railroad gate guard, and the attitude of the driver who is not disciplined. Who is responsible for the manufacture of railroad level crossing barriers for safety and security?, What is the responsibility of the Railroad in the event of an accident resulting from the absence of level crossings? and the research method used is Normative legal research, analyzed descriptively, using secondary data supported by primary data and processed qualitatively. The results of the study found that Article 94 of Law Number 23 Year 2007 concerning Railways states paragraph (1) For the safety of railroad trips and road users, level crossings that do not have a permit must be closed; Paragraph (2) Closure of level crossing as referred to in paragraph (1) shall be carried out by the Government or Regional Government. If an accident occurs due to the unavailability of a crossing doorstops, then PT. Kereta Api Indonesia is not responsible for the accident, because the responsibility for procuring the level crossing is not the responsibility of PT. Kereta Api Indonesia.
Environmental Development and Empowerment from Industrial Impact
Authors: Hendrati Ignatia Martha , Fitrianto Achmad Room
Published: July 2020

This study aimed to determine and analyze Environmental Development and Empowerment from Industrial Impact in effort of local Economic Development and Communities empowerment around the PT. Semen Indonesia (SMGR). The results showed that SMGR has tried to implement through activities that show a sense of social concern as well attempt to empower communities around the cement plant. In one hand it could be accounted as company external cost and in other hand as one of company contribution in increasing local community welfare program that has been rolled out to the community around Tuban Cement Plant had a significantly positive influence on the improvement of the welfare of the community. However, of the 10 areas of empowering program that have been implemented have not been all that good satisfaction scores of communities participating in the program.
The Individuals Knowledge at Risk to Suffered of Non Communicable Disease
Authors: Suprajitno  , Mugianti Sri
Published: July 2020

Non-communicable diseases such as Cancer, Heart disease, Stroke, and Diabetes Mellitus can occur at the age of 15-45 years. Efforts to prevent non-communicable diseases in Indonesia through increasing community knowledge about CERDIK (Cek kesehatan berkala / periodical health checks, Enyahkan rokok/eliminate smoking, Rajin aktivitas fisik/routinely physical activity, Diet sehat seimbang/balanced healthy diet, Istirahat cukup/adequate rest, and Kelola stress/manage stress). The study purpose describes the knowledge of productive age individuals who are at risk of suffered to non-communicable diseases about CERDIK. The study design was cross-sectional. Subjects were 213 individuals who visited fast food and beverage restaurants in Blitar City, selected by simple random sampling. Data collection used the CERDIK knowledge questionnaire in March - August 2019. Data analysis used descriptive. Knowledge as a process of individual cognition that was medium and good categorized as much as 74%. It is recommended that CERDIK’s socialization be carried out continuously and everywhere.
Detection of Oil and Filter Feasibility in Ship Gearbox with SVM (Support Vector Machine) Method Based on Microcontroller
Authors: Budi Santosa Ari Wibawa , Saputra Septian Wahyu , Sutrisno Imam , Lusiandri Ari Yudha , Nofandi Faris
Published: July 2020

Lubrication systems on ships are vital for a ship to operate while sailing. Lubrication serves to prevent direct friction between components on the ship engine, especially the gearbox. Gearbox is one of the components of the ship crane that acts as the propeller of the ship. Obviously related to friction between components, therefore a lubrication system is needed. Some lubrication systems on Indonesian warships still use manual systems to monitor oil and filter change schedules. This can make the operator forget about the oil and filter change schedule. With the development of technology that is now the author makes a prototype with an oil and filter feasibility detection system on a ship gearbox. The author uses the SVM method that is able to classify properly or not like an oil. By using a viscosity sensor and a temperature sensor to be processed by the SVM method and a color sensor to detect a color in the oil filter. The results of the SVM method are quite accurate with 100% accuracy can distinguish good and bad oil from the samples used are new oil and used oil. There is a change in the intensity of the light that causes the color sensor readings in conditions of 100%, conditions of 30%, conditions of 40%, and conditions of 50%.
Analytic Hierarchy Process Method for Minimize Negative Sustainability and Environmental Impacts
Authors: Jakaria Ribangun Bamban , Widodo Heri , Haizal N , Ibrahim M B
Published: July 2020

The concept of economic linearity that is, take, make, and discard, is no longer relevant in product design, this is due to product design must meet economically, safely and reliably shown by looking at the attributes inherent in the product, which aims to make customers feel satisfied, buy go back and recommend the product. However, with the increasing number of products that are not environmentally friendly it is necessary to minimize the negative impact of sustainability in designing products that require a recovery phase. This study aims to determine the effect of sustainable product design in minimizing the negative impacts caused by attitudes and behaviors that are influenced by the environment. The analysis technique uses PLS 3.0 warp. and the Process Hierarchy Analysis (AHP) method. The results of the design of this research product have a direct influence on the impact of negative sustainability with a parameter coefficient of 0.609. This means, sustainable product design is carried out, must pay attention to the negative impacts caused, then test the factors that are more dominant relationships between variables using AHP that produces. The most dominant factor in testing the sub-criteria that influence product design in Minimizing the Impact of Negative Sustainability, from the results of tests that have been done, then the behavior of the Environment with a value of 0.57 is the conclusion that in designing the product in order to minimize the negative impact of the influence due to the conditions used in Sustainable product design, the influence of human environmental behavior on the environment becomes a major factor
Research on Drought Retrieve in Baiyangdian Basin, China
Authors: Yan Sheng , Yin Jun , Yuan Zhe , Yan Denghua , Yuan Yong
Published: July 2020

Driven by global warming and human activities, the frequency, intensity and duration of drought have all showed an increasing trend. Most of the research on drought are only based on observed records, which cannot represent the natural evolution law of drought. Drought retrieve is of great importance to rational allocation of water resources in both social-economic system and natural ecological environment. This paper established the general framework of drought retrieve and did case study in Baiyangdian Basin, China. The Baiyangdian Basin of China has been suffering from severe drought in the recent years. Under the same precipitation and surface water resources condition, retrieved water flowing into the Baiyangdian wetland is much larger than the actual amount of inflow.
A prediction model for local scour depth based on BP and GA-BP neural network
Authors: Dong Haiyang , Chong Lin , Zhou Hanyu , Li Zongyu
Published: July 2020

A prediction model for the local scouring depth at bridge piers is built using BP and GA-BP neural network method. Measured data is collected from laboratory tests and field observation to work as train set of the predicting model which is verified by the measured data of Hangzhou Bay Bridge. The result shows that the predicted values of the local scour depth of the piers obtained by the two models are in good agreement with the measured values, which is more suitable than the existing general formula. What’s more, GA-BP model performs better than BP model.
Study on Ecological Resources and Tourism Sustainable Development of Xixi Wetland
Authors: Die HU
Published: July 2020

With the rapid development of the urbanization in China, the wetland ecotourism has become a popular form of travelling for the most of consumers in recent years. The development of the wetland ecotourism not only can enrich the ways of tourism and promote the economic development of the wetland areas, but also can establish a foundation for the comprehensive development of tourism industry. However, as the development of tourism industry in China is not long enough, at present, the wetland ecotourism is still making process. Besides that, due to the lack of scientific understanding, people often ignore the influence and destruction of the tourism ecological resources caused by travelling. And people also ignore the psychological capacity and economic demand of the residents who live in the wetland. This paper intends to carry out a field study on Xixi Wetland to explore the existing problems of the ecotourism on it. And then, according to the result of this research, the corresponding countermeasures of ecotourism are provided based on the analysis of the sustainable development of ecotourism of Xixi Wetland.
Analysis on the changes of zooplankton in the restoration of urban lake water
Authors: Chen Guangrong
Published: July 2020

The combination of aquatic vegetation restoration and biological manipulation had become one of the important ways of ecological restoration of lake water. Zooplankton was closely related to aquatic plants, which affected the species composition, density and diversity index of zooplankton. Zooplankton was also a part of biological manipulation, which helped to control phytoplankton and improved the transparency of water body. Through the analysis of the role of zooplankton in ecological restoration and the response of zooplankton to the ecological restoration of water body fully reflected the complementary relationship between biological manipulation and aquatic vegetation restoration. Combined with the practice of zooplankton changes in the ecological restoration of typical tropical shallow city lake, it was expected to provide basis and support for the restoration of urban lake.
Research on Deep Foundation Pit Excavation Based on Data Monitoring
Authors: Fei Yang , Xili Qi , Yanzhang Wu , Shiyong Cao
Published: July 2020

The safety of foundation pit is related to the safety of surrounding buildings and roads, so it is necessary to closely observe the settlement around the excavation process. Based on the monitoring data during the excavation of the deep foundation pit project in a hospital in Guiyang, this paper studies the variation law of the excavation process of the deep foundation pit:If the excavation depth of the foundation pit is above 9 m, the key factor affecting the settlement is the surrounding shallow foundation, and the factor that has great influence on the settlement of the foundation pit below 9 m is the side length of the foundation pit;After the depth of the foundation pit reaches 15 m, the influence of the side length of the surrounding shallow foundation and the foundation pit on the settlement around the foundation pit will gradually disappear, and the settlement of the foundation pit will become stable at this time;Around the road settlement in the excavation depth of 12 m more obvious changes in the settlement area below 12 stable and less later changes;The change law of crown beam settlement and horizontal displacement of foundation pit tends to be consistent with the surrounding settlement.
Large-diameter Long-hole Full-length Cumulative Cutting Blasting Control Technology under the Condition of Adjacent to Filling Body
Authors: Feng Panxue
Published: July 2020

For the pillar stope adjacent to the filling body, in order to reduce the damage of blasting to the filling body as much as possible, the large-diameter long-hole full-length cumulative cutting blasting control technology is used for the side hole. The special PVC cumulative pre-cutting pipe is used for the side hole, the strip charge and the air column are distributed at intervals, and the accurate positioning device of blasting cutting line is used in the process of lowering. Compared with the previous side hole blasting control technology based on loose blasting and smooth blasting, this technology controls the damage caused by the impact energy entering the filling body through the heterogeneous interface, so as to realize the concentrated release of blasting energy in the target direction and directional rock breaking.
Study on monitoring and analysis of rock dynamic disaster based on multi-parameter coupling
Authors: Ma Yutao , Yuan Bensheng , Jin Kaiming
Published: July 2020

The problems of ground pressure appeared in a deep gold mine, so a microseismic monitoring system was established. In order to break through the bottleneck of independentce among microseismic monitoring, rock mechanics parameters, stress and strain monitoring, to realize information fusion of multiple parameters under time synchronization, and to improve the reliability of analysis results, especially early warning, firstly, the temporal and spatial evolution of microseismic events such as magnitude-frequency, volume potential-frequency and energy-frequency were analyzed, secondly, the relationship between microseismic events and rock mechanics parameters was constructed, thirdly, the multiple parameters such as microseism, stress and strain were mutually analyzed, finally, the mining disturbance parameters and the overall trend of mine dynamic disaster were analyzed. The results show that the combination of microseismic monitoring in a wide area and stress-strain monitoring in a key area can realize the mutual identification and verification of the parameters, and greatly improve the reliability of the overall trend analysis of rock dynamic disasters. The overall trend analysis method of rock dynamic disasters based on multi-parameter coupling is worth popularizing.
A Modified Mohr Coulomb Criterion for Rocks with Smooth Tension Cut-off
Authors: Wang Zhaofeng
Published: July 2020

In this study, in order to solve the limitation of the modified Mohr-Coulomb criterion in the numerical implementation induced by the corners or apexes, a modified Mohr-Coulomb criterion with smooth tension cut-off has been proposed. Both the nonlinear meridian shape function and the deviatoric shape function have been studied, and the failure surface of the proposed criterion is smooth and derivable at any stress states. The criterion has been verified through numerical simulations and comparison with the experimental results. Furthermore, it will be easier to adopt this smooth criterion in the numerical algorithm without losing good qualities of modified Mohr-Coulomb criterion.
Optimization of decay time in radioactivity detection of building ceramics and analysis of radioactivity level of ceramics in Nan’ an city
Authors: Lin Tinghui
Published: July 2020

The basic principle of radioactivity and the technical method for measuring the radioactivity of ceramic tiles with low background multi-channel high-purity germanium gamma spectrometer are introduced. The reasonable optimization of the balance time of tile radioactivity detection has certain reference value for improving the level of radioactivity detection technology. Combined with the data analysis of the special quality supervision and random inspection of ceramic tiles in the past five years, the radioactivity indicators of ceramic tile products in the jurisdiction are all at a qualified level, effectively eliminating the hidden dangers of radioactive safety of ceramic tile products and ensuring the health and safety of the citizens.
In the bottom layer the Hg content controlled by both Seasonal variation and transportation source
Authors: Yang Dongfang , Lin Dong , Wang Qi , Zhang Longlei , Li Haixia
Published: July 2020

Based on the investigation data of Jiaozhou Bay in 1992, the vertical distribution and seasonal variation of Hg in the surface and bottom layers from the center of the bay to the southeast of the bay were studied, and the seasonal distribution, variation range and horizontal distribution trend of Hg content in the surface and bottom layers were determined. The results showed that in May, August and October, in Jiaozhou Bay, from the central water area to the coastal water area in the southeast of the Bay, from the surface layer to the bottom layer, the range of Hg content in the bottom layer and the surface layer was: 0.007-0.040 μg/L, which conformed to the national water quality standard of class I seawater, and the water was not polluted by any Hg content. From May to October, in the central waters of Jiaozhou Bay, the seasonal changes of Hg content in the surface layer from low to high were spring, summer and autumn, and the seasonal changes of Hg content in the bottom layer from low to high were autumn, spring and summer. In the surface of the coastal waters in the southeast of Jiaozhou Bay, the seasonal changes of Hg content in the surface and bottom layers from low to high were autumn, spring and summer. The author put forward the law of Hg deposition: in summer, marine organisms propagated in large numbers, but in spring and autumn, there was no large number of marine organisms propagated. In this way, the Hg content sediment depended entirely on the combination of zooplankton, phytoplankton and floating particles in the sea water. Therefore, in summer, a large amount of Hg was taken to the seabed, while in spring and autumn, no large amount of Hg was taken to the seabed. In May, August and October, the change of Hg content in the surface and bottom layers fully confirmed the settlement law. Moreover, it was believed that a large number of marine organisms in the water were the main carriers to bring a large number of Hg to the seabed. Therefore, the variation of Hg content in the bottom was determined by the surface Hg content and the vehicles that transport Hg content vertically to the sea bottom, which resulted in the fact that the horizontal distribution trend of Hg content in the surface and bottom was same.
Plastic Effect Analysis of High Strength Steel Frame Structure
Authors: Chen Peixu , Zhang Zheng , Liao Rensheng
Published: July 2020

High strength steel structure is more and more widely used in the field of building structure because of its advantages in mechanical properties. The design of high-strength steel frame often refers to steel structure. For the high-strength steel with no yield platform of stress-strain curve, the influence of plastic strain before the nominal yield strength of its material on the results of the frame remains to be studied. In order to study the influence of plastic effect on high-strength steel frame, the second-order elastic-plastic analysis of typical frame is carried out and compared with the simplified design method of steel structure design standard. The results show that the plastic effect has no significant effect on the bending moment and lateral displacement of high-strength steel frame in most cases. Base on the analysis results, the design suggestions of high-strength steel frame structure are put forward.
Sponge Basin Characteristics of the Original Ecosystem in Ziquejie Terraces and its Adaptive Water Supply and Demand Balance Mechanism
Authors: Guiyuan Li , Xingyi Xu , Chunyan Hu
Published: July 2020

Based on the analysis of the observation results of rainfall and runoff and hydrogeological exploration in the Ziquejie terraces, the concept of “equal slope underground sponge reservoir” in the terraces is proposed. Compared with the ordinary linear storage and drainage process of groundwater in the basin, the “equal slope underground sponge reservoir” has a very significant characteristic of “sponge basin” which can adjust peak and relieve dry and prolong the outflow time. The calculation formula of non-linear outflow of underground water in the “sponge basin” is given. The characteristics of this “sponge basin” and its non-linear outflow principle and the coupling relationship among irrigation, water supply and drainage of ancient terraces are demonstrated. An adaptive balance model of water supply and demand in the original ecosystem of ancient terraces is established. The model is applied to simulate a long series of water supply and demand balance in the original ecosystem of the ancient terraced field, and the check results are highly consistent with the Historical Drought Resistance records of the ancient terraced field. It is proved that the principle of non-linear groundwater outflow in sponge basin and its calculation formula are correct and practical. The research results have important guiding significance for the development, utilization and protection of other ancient terraces, and also have important reference value for the development of sloping farmland.
Numerical analysis of bearing characteristics of composite foundation with variable diameter rigid pile
Authors: Wei Liu , Zhao Zhonghua
Published: July 2020

Variable diameter rigid pile composite foundation are proposed for the multi-layer foundation. The bearing characteristics of composite foundation with variable diameter rigid pile under vertical load are numerically calculated and analysed. The research content of this paper focuses on the variation law of load and settlement of composite foundation, pile axial force, pile lateral friction resistance and distribution law of soil internal force between piles under different diameter ratios etc. The results showed that Variable diameter of rigid pile composite foundation can effectively improve bearing capacity and control settlement and reduce the stress level of soil; negative skin friction section at the top of pile decreases with variable diameter ratio D/d increases, Zero skin friction section in diameter produced and increases with variable diameter ratio D/d increases; Optimal diameter ratio of pile in the variable diameter rigid pile composite foundation should be at about 1.75.
A Prediction Model for Local Scour Depth around Piers Based on Machine Learning
Authors: Dong Haiyang , Chen Fanjun , Zhou Hanyu , Guo Cong , Sun Zhilin
Published: July 2020

A prediction model for the local scouring depth at bridge piers is built using machine learning. Measured data which is collected from laboratory tests and field observation is used to train the predicting model which is verified by the measured data of Hangzhou Bay Bridge. The result shows that the predicted value of the local scouring depth at piers obtained by the machine learning model is in good agreement with the measured ones, which is more suitable than existing general formula. The machine learning method is effective in predicting the local scour depth at bridge piers.
Research on the Method of Measuring the Elevation of Bored Pile Head by Pressure
Authors: Liu Xiaoling , Du Peng , Peng Shuai , Fu Lianhong , Chang Qiang
Published: July 2020

The detection of pile top elevation is a key link of pile quality control. Based on the jacking principle, this paper analyzes the shortcomings of the existing measurement methods, innovatively introduces the pore pressure to consider the influence of the change of slurry level, effectively proposes an improved pressure detection method, and designs a pressure detection device. The device is simple and easy to operate, which can provide reference for the field research on the elevation of the top of bored pile.
Study on Creep Failure of Powder Metallurgy
Authors: Zhang WX , Yang LM
Published: July 2020

Based on the damage theory of Kachanov-Rabotnov, this paper studies the metallurgical materials with inclusions by numerical calculation. The results suggest that the creep failure theory is suitable for the analysis of the fatigue creep interaction behavior of powder metallurgy, and the creep failure is obviously related with the number of fatigue cycles.
Study on Damage Law of Multistory and High-rise Steel Frame Structures under Strong Earthquake
Authors: Zou Chuanlong , Chen Yanyan
Published: July 2020

In order to study the seismic performance of steel frame structures of multistory and high-rise buildings under strong earthquake, six and nine story steel frame structure models are established. In this paper, based on the peak acceleration of frequent earthquakes with 8 degree (0.2g) seismic effect and the finite element calculation of artificial seismic wave, the damage law of multi-storey and high-rise steel frame structures is studied under strong earthquakes, such as Taiwan CHICHI earthquake and the MENDOCINO earthquake in the United States. The results suggest that: under the strong earthquake, the inter-storey drift angle is obviously concentrated when the cross-section size of column and beam changes, so that the rational control of the inter-storey drift angle is conducive to reducing the concentration of structural damage.
Research on the Creation of Vibrant Public Space Suitable for People of all Ages in the Residential Block Based on Superposition Analysis of Behaviour Track——Examination of North Street of Sisheng Ancestral Temple in Chengdu City as an Example
Authors: Zhang Chengyan , Ma Qing , Zhang Lingqing
Published: July 2020

As the dynamic carrier of different age groups, block public space is closely related to its space. This study takes the public space of the north street block of Sisheng ancestral temple as the research object. Through the field research of space observation, behaviour tracking and interviews of people of all ages, this paper studies the public space composition and characteristics of the north street block of Sisheng ancestral temple, analyzes the behaviour types and characteristics of different age groups, extracts the space elements, further analyzes the degree between space and behaviour correlation. On this basis, according to the space use needs of people of all ages, this paper puts forward strategies for creating vitality of public space for people of mixed ages in the residential blocks.
Corrosion Behavior and Evaluation of Modified Silicate Composite Grounding Material in Soil
Authors: Li Wenjie , Meng Lingjian , Tang Jipeng , Liu Rui
Published: July 2020

In view of the problems of metal grounding material, including non-corrosion resistance, poor combination with soil, easy to steal and so on, a kind of composite grounding material with the modified silicate cladded carbon steel is developed, which takes the corrosion resistance of modified silicate material and the good conductivity of metal into account. By simulating the corrosion tests in the environments with different pH value, the results show that in the soil with different pH value, the modified silicate can protect the carbon steel well, and its anti-corrosion effect is better than that of the galvanized steel; in the soil with pH = 5, its anti-corrosion effect is better than that of copper; in the soil with pH = 9, its anti-corrosion effect is better than that of copper plated steel. The modified silicate composite grounding material has obvious corrosion resistance in both acid and alkaline soil.
Effects of Oxygation on Super Rice under Different Irrigation and Drainage Management Modes in Rice Field
Authors: Li Gui-yuan , Chen Xiang , Xu Xing-yi , Zhang Yong , Hu Chun-yan
Published: July 2020

The management mode of irrigation and drainage in field during the growth period of super rice will directly affect its growth trend, yield and water consumption. Increasing the oxygen content of irrigation water will help to promote the growth of rice and increase the yield. To understand the effect of oxygation on growth and yield of super rice, 7 irrigation and drainage management modes were designed and carried out in the super hydrid early rice field during the whole growth period by using oxygation and non-oxygation, so as to find a better management mode under different conditions. The results showed that the oxygation with the same irrigation in field had a significant effect on promoting the growth and increasing the yield of rice compared with that non-oxygation. However, the results of increasing the yield of rice by oxygation were very different among the modes. Under the oxygation condition, the Drought-tolerant II had the best growth trend and yield increase, and the irrigation water quantity was in the middle level, which had better water conservation and drainage reduction effect compared with the conventional mode. The Drought-tolerant II is “controlled irrigation and storage” mode, which is moderate water shortage controls irrigation and moderate rain storage controls drainage. The moderate water shortage controls irrigation mean that the soil moisture content is lower than 70% of the saturated water capacity as the irrigation control parameter during the drought in rice field. The moderate rain storage controls drainage the maximum rain storage depth of 200 mm as the field drainage control parameter during the rain in rice field. The results indicated that the Drought-tolerant II is a relatively optimal irrigation and drainage management method for rice field in southern China.
Grouting Construction Technology in Anti-seepage Treatment of Reservoir
Authors: Tao Zhang
Published: July 2020

At the current stage, with the rapid development of society, it has also driven the rapid development of reservoir dams. Many reservoir dams now need to use multiple anti-seepage technologies to strengthen and remove dangers. Different methods have different advantages, which are more applicable to different dam functions or geological conditions. When carrying out the danger-reinforcement and reinforcement, the best anti-seepage treatment technology is selected through different situations, so as to achieve the best quality of the reservoir danger-reinforcement and reinforcement project. In view of this, this article has carried out a detailed discussion on the grouting and anti-seepage treatment technology in the reservoir’s danger-reinforcing and reinforcement construction, in order to provide a more intuitive reference for the industry and make contributions to the development of reservoir dams in the future.
Fracture study of piezoelectric materials: a brief state of the art
Authors: Liu S.M. , Zhang H.H. , Han S.Y.
Published: July 2020

Piezoelectric materials are intelligent materials which can realize the mutual conversion of mechanical and electrical energy and have been widely used in many fields. Due to their brittleness, these materials are prone to cracking under external loadings. In this work, a brief overview of the current states on the fracture of piezoelectric materials is presented from experimental, theoretical and computational aspects, and then some future work is suggested.
Experimental Study on Physical Excitation of Cementation Activity of Lead-zinc Smelting Slag
Authors: Xin Li , Li-jie Guo , Wen-chen Li
Published: July 2020

In recent years, it is a hot research direction to improve the internal structure and properties of smelting slag by physical grinding and to prepare filling cementitious materials suitable for mining. The paper starts from the test of physical and chemical properties of the smelting slag of a lead-zinc mine, the relationship between the density and specific surface area of lead-zinc smelting slag and the different grinding time was obtained by analyzing the chemical elements of the smelting slag filled with lead-zinc, the density and specific surface area of the smelting slag with different grinding time, and the potential gelling activity of lead-zinc smelting slag were effectively evaluated. It provides a theoretical basis for lead-zinc smelting slag as a new filling material for mines.
Finite Element Damping Simulation of Viscous Damper for Simply Supported Beam Vibration Mitigation
Authors: Bai Bing , Guo Jing
Published: July 2020

Aiming at the issue of vibration mitigation of viscous damper, the FE simulation of the velocity dependent damper is studied. Based on the analysis of composition and mechanical performance of the damper, the key equation and parameters are identified and analyzed firstly. Thus according to the software regulations, two different element types COMBIN14 and COMBIN37 are selected to verify their damping characteristics. Adopting the commonly used simply supported beam as investigation object, the FE model is established and compared. Results show that COMBIN14 can only simulate the behavior of linear damper, while COMBIN37 has the capacity of simulating nonlinear damper. The related force-velocity equation and parameters can be achieved indirectly by modifying the element settings. And the damping effect with the change of different parameters is discussed. The results show that the attenuation effect of vibration has a positive correlation with damping coefficient C and a negative correlation with exponent α in a certain range.
Dynamic Buckling of Elastic Cylindrical Shell under Axial Impact Load
Authors: Zhang WX , Yang LM
Published: July 2020

In this paper, the original and dual variables for the dynamic buckling of elastic cylindrical shell under the axial impact load are constructed by means of the energy of the system, and the Hamiltonian system of the system is established. In symplectic geometry space, the critical buckling loads and buckling modes of cylindrical shells are reduced to symplectic eigenvalues and eigensolutions.
Symplectic Solutions for Functionally Gradient Materials
Authors: Zhang WX , Yang LM
Published: July 2020

In this paper, a new symplectic method for quasi-static functionally gradient material is proposed. By using the method of separating variables, the governing equations and the complete eigensolution space under symplectic system are established. In addition, the methods of variable substitution and eigenvector expansion are used to deal with the boundary conditions.
COMPARISON of Chinese and Foreign Specifications on Bending Behavior of Z-Purlins under Wind Uplift Load
Authors: Huang Rui , Luan Wei
Published: July 2020

It is very difficult to calculate the bending bearing capacity of cold-formed purlins under wind uplift load precisely. The design requirements, which are different in Chinese and foreign specifications, such as GB 50018, CECS 102, EN 1993-1-3, AISI S100 and AS/NZS 4600, are summarized comprehensively. The differences of design methods, calculation models and considerations on restraint effects of lightweight steel roof systems among these specifications are also discussed. The bending bearing capacity of 18 rows of commonly used Z-purlins calculated according to these specifications is analyzed. The analysis shows that for purlins without sag-rod, the calculation results of GB50018 are conservative because the beneficial effects of restraint from lightweight steel roof systems are neglected. For purlins with two rows of sag-rods per span, the calculation results of GB50018 are nearly 20% greater than that of EC3, and the results of AS/NZS are the largest.
The Mechanical Properties of Planting Concrete
Authors: Huang Yamei , Wang Lihua , Li Zhaoheng
Published: July 2020

Planting concrete has been widely used in river revetment engineering for its revetment stability, erosion resistance, landscape suitability and the ecological function. In this paper, the influences of water-cement ratio, cement content, aggregate size and curing period on the mechanical properties, apparent density and porosity of planting concrete were studied. Under the optimal water-cement ratio, the compressive strength, flexural strength and apparent density of planting concrete increase linearly with the increase of cement content, while the porosity decreases linearly. The compressive strength, flexural strength and porosity decrease linearly with the increase of aggregate size, while the apparent density increases linearly. The mechanical properties improve with the increase of curing period.
Effect of Al content on the hot deformation behavior and microstructure evolution of TiAl-6(Cr, Nb, Ta) alloy
Authors: Liu Hongwu , Gao Fan , Feng Xiangzheng , Li Zhenxi
Published: July 2020

The effect of Al content on the hot deformation behavior and microstructure evolution of TiAl-6 (Cr, Nb, Ta) alloy was studied by hot compression tests. The results show that when the alloy presented a low Al content, it contained a greater percentage of β + γ mixed structure at the grain boundary, and a finer lamellar colony size. Under the same deformation conditions, a reduction in Al content lead to a reduction in flow stress, but the hot deformation activation energy Q increased from 540 kJ mol−1 to 617 kJ mol−1. The increase of the β + γ mixed structure at the grain boundary promoted the rotation of the lamellar colony, thereby inhibiting the lamellar twisting process, and also reducing the dynamic recrystallization volume fraction. Reducing the strain rate and increasing the amount of strain can increase the dynamic recrystallization volume fraction of the alloys. When extruded at 1150 °C with an extrusion ratio of 10:1, both alloys containing Al presented a completely recrystallized structure.
Surprise!
Authors: Cole Stephen R , Edwards Jessie K , Greenland Sander
Published: July 2020

Measures of information and surprise, such as the Shannon information value (S value), quantify the signal present in a stream of noisy data. We illustrate the use of such information measures in the context of interpreting P values as compatibility indices. S values help communicate the limited information supplied by conventional statistics and cast a critical light on cutoffs used to judge and construct those statistics. Misinterpretations of statistics may be reduced by interpreting P values and interval estimates using compatibility concepts and S values instead of “significance” and “confidence.”
Layer-Specific Inhibitory Microcircuits of Layer 6 Interneurons in Rat Prefrontal Cortex
Authors: Ding Chao , Emmenegger Vishalini , Schaffrath Kim , Feldmeyer Dirk
Published: July 2020

GABAergic interneurons in different cortical areas play important roles in diverse higher-order cognitive functions. The heterogeneity of interneurons is well characterized in different sensory cortices, in particular in primary somatosensory and visual cortex. However, the structural and functional properties of the medial prefrontal cortex (mPFC) interneurons have received less attention. In this study, a cluster analysis based on axonal projection patterns revealed four distinct clusters of L6 interneurons in rat mPFC: Cluster 1 interneurons showed axonal projections similar to Martinotti-like cells extending to layer 1, cluster 2 displayed translaminar projections mostly to layer 5, and cluster 3 interneuron axons were confined to the layer 6, whereas those of cluster 4 interneurons extend also into the white matter. Correlations were found between neuron location and axonal distribution in all clusters. Moreover, all cluster 1 L6 interneurons showed a monotonically adapting firing pattern with an initial high-frequency burst. All cluster 2 interneurons were fast-spiking, while neurons in cluster 3 and 4 showed heterogeneous firing patterns. Our data suggest that L6 interneurons that have distinct morphological and physiological characteristics are likely to innervate different targets in mPFC and thus play differential roles in the L6 microcircuitry and in mPFC-associated functions.
Rapid Emergence of SARS-CoV-2 in the Greater New York Metropolitan Area: Geolocation, Demographics, Positivity Rates, and Hospitalization for 46 793 Persons Tested by Northwell Health
Authors: Reichberg Samuel B , Mitra Partha P , Haghamad Aya , Ramrattan Girish , Crawford James M ,   Northwell COVID-19 Research Consortium, Berry Gregory J , Davidson Karina W , Drach Alex , Duong Scott , Juretschko Stefan , Maria Naomi I , Yang Yihe , Ziemba Yonah C
Published: July 2020

Background

In March 2020, the greater New York metropolitan area became an epicenter for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. The initial evolution of case incidence has not been well characterized.

Methods

Northwell Health Laboratories tested 46 793 persons for SARS-CoV-2 from 4 March through 10 April. The primary outcome measure was a positive reverse transcription–polymerase chain reaction test for SARS-CoV-2. The secondary outcomes included patient age, sex, and race, if stated; dates the specimen was obtained and the test result; clinical practice site sources; geolocation of patient residence; and hospitalization.

Results

From 8 March through 10 April, a total of 26 735 of 46 793 persons (57.1%) tested positive for SARS-CoV-2. Males of each race were disproportionally more affected than females above age 25, with a progressive male predominance as age increased. Of the positive persons, 7292 were hospitalized directly upon presentation; an additional 882 persons tested positive in an ambulatory setting before subsequent hospitalization, a median of 4.8 days later. Total hospitalization rate was thus 8174 persons (30.6% of positive persons). There was a broad range (>10-fold) in the cumulative number of positive cases across individual zip codes following documented first caseincidence. Test positivity was greater for persons living in zip codes with lower annual household income.

Conclusions

Our data reveal that SARS-CoV-2 incidence emerged rapidly and almost simultaneously across a broad demographic population in the region. These findings support the premise that SARS-CoV-2 infection was widely distributed prior to virus testing availability.