bluuebunny/crossref_metadata_2025 huggingface dataset:
Systematic Risk and Idiosyncratic Risk Literature Review
Authors: Huang Linye
Published: July 2022

This paper summarizes the previous conclusions on the factors related to systematic risk and idiosyncratic risk. This paper summarizes the impact of some specific macroeconomic factors, product market competition, and investor sentiment on this risk. Then it summarizes the impact of corporate governance and corporate social responsibility on idiosyncratic risk. I found that these factors have different degrees of influence in different environments, countries, and markets, and made a comparative analysis of individual factors. Help investors or company managers better understand the factors related to these two risks.
Research on the Spatio-temporal Evolution and Influencing Factors of the Innovation Capability of the New Generation of Information Technology Industry
Authors: Wang Qianying , Jiang Ling
Published: July 2022

In the critical period of China's economic transformation, the new generation of information technology plays an important role, and the key to the development of the new generation of information technology industry lies in innovation. This paper takes 31 Chinese provinces and cities as the research objects, and based on the data related to the innovation capability of the new generation of information technology industry from 2010 to 2019.Firstly this paper analyzes the spatial and temporal evolution of the innovation capability of the new generation of information technology industry in 31 Chinese provinces and cities using the entropy method. Secondly, principal component regression analysis is applied to analyze the main influencing factors of the innovation capability of the new generation of information technology industry and its degree of influence. Then it was concluded that the innovation capability of China's the new generation of information technology industry showed an overall upward trend, but the growth rate slowed down in 2018; there were obvious differences between the innovation capability of coastal regions and inland regions, and the regional development was unbalanced; the factors that had a greater impact on the innovation capability were focused on the capital investment in innovation (41.839%) and talent investment (26.975%).Finally, it proposes to strengthen the core technology research and development to accelerate the development of independent innovation, strengthen the leading role of coastal areas to promote balanced and coordinated development of the industry, broaden financing channels to increase capital investment, pay attention to personnel training while strengthening the government's guiding role, and improve the industrial development environment.
A Review of Research on Artificial Intelligence Life Cycle Based on Bibliometrics
Authors: Rong Xinping , Li Ailian
Published: July 2022

This paper uses bibliometric method and knowledge graph visualization technology to analyze the 237 papers of CNKI core journals from 2006 to 2021, from the key words, number of papers, authors, publishing institutions and high-impact journals. Statistical analysis, explaining the research status and research hotspots of artificial intelligence life cycle, and expounding the shortcomings and trends of research. The research on artificial intelligence technology is divided into exploratory stage and development stage according to the annual publication volume. From 2006 to 2015, the research hotspots mainly focus on "artificial intelligence" and " neural network ". From 2016 to 2021, the research hotspots mainly focus on three aspects: "artificial intelligence", "artificial intelligence technology" and "deep learning", and the research is gradually deepened, with a total of 223 journal articles. The research of artificial intelligence technology is in the development stage, and various fields are actively studying artificial intelligence technology, but the existing research focuses on the application level, the deep learning theory is not perfect, the basic technology and basic theory are ignored, and there is a lack of solutions to the problem of privacy leakage. Future research should pay more attention to basic technology and innovative research. There may be broader research space for research from two aspects: "integration and breakthrough of deep learning theory" and "machine learning evolution towards distributed privacy protection".
Comparison between newly developed gravity energy storage and pumped hydro storage
Authors: Kang Zhening , Kevin  , Zhuang Ze
Published: July 2022

The world is currently facing a new energy crisis, which has prompted a focus on energy storage technologies to solve the global energy crisis. Taking advantage of the height difference between two dams and turning them into one is the main difference between gravity energy storage (GES) and pumped hydro storage (PHS) presented in this paper. This paper first introduces the basic principles of each of these two technologies, and then compares the two technologies through economic and parametric perspectives, showing the advantages of GES technology such as higher efficiency, easier construction at less cost, and the promise of GES. Some case studies may not reveal convincing trends in GES development, but they can still be used to compare the technology's present state of development. This research stresses that GES has higher promise as a newly created technology. Both technologies are promising and excellent renewable energy sources, but to truly evaluate which is superior in the long run, economic factors must be analyzed and compared. GES technologies are also being researched to assist the world in alleviating the pressures of the energy crisis and the environmental issues produced by stored energy.
Grid-Grade Rechargeable Batterie and Predication in Future
Authors: Liu Zikun , Xue Bowen , Xie Zechen , Zhao Guangyu
Published: July 2022

China is in a period of the energy transition; more renewable energy is used to replace coal which has caused more and more environmental issues. Researches on energy storage play a significant role in the government’s future sustainable development plans. In this article, four types of rechargeable batteries’ characteristics will be explored and their applications for grid-scale energy storage. The Lithium-ion battery is the most well-established with the less exploring room one. Then Nickel-metal hydride battery, due to the complexity of its reaction condition and electrode materials, still retains room for exploration after decades of development. Mn-Cu battery and Mn-H battery have the shortest development cycle and are mostly still in the experimental research stage. The rechargeable battery is one of the most promising energy storage technologies in the future, but there are many kinds of rechargeable batteries, only part of which can be applied to hydropower storage. In this article, four types of rechargeable batteries are listed in different development stages. By analyzing and comparing their performance, the feasibility of grid-level energy storage is summarized, and the future development direction of them is predicted.
Hydrogen energy production, storage methods, and applications for power generation
Authors: Shi Xinhui
Published: July 2022

Nowadays, the transformation of energy structure has become an important task for society. The advantages of hydrogen energy also meet the criteria of people's choice of energy. This paper introduces hydrogen production, storage methods, and their application for the power generation. In hydrogen production part, POM is the most satisfactory of four methanol to hydrogen methods as this reaction does not require any energy and can be more than 50% efficient. In terms of photolytic water technology, Ti- and Zr-based Photocatalysts, Ta- and Nb-Based Photocatalysts, Ga and Ge-Based Photocatalysts have been applied to increase the reaction rate, in addition, the device has the advantage of a small footprint, ease of operation and high measurement accuracy. In the microbial hydrogen production section, experiments have shown that hydrogen production is highest in a thermally shocked environment, and that genetic modification of the organisms at the molecular level can also increase hydrogen production. For the hydrogen power generation, the PEMFC is by far the most used experimental product for grid-connected power generation. In the future, researchers should focus on solving various existing problems and developing more economical and efficient hydrogen power generation systems to realize the large-scale use of clean energy. Meanwhile, this paper expects to find better solutions to solve existing problems.
Application of fluorescence-based analysis methods
Authors: Chen Suqin , Gu Chenglong , Hu Chenxi , Xu Jinglai
Published: July 2022

Fluorescence has been discovered over decades and enormous fluorescence technology appear and been applied to different field. This article mainly focuses on the fluorescence technologies with good function or potential that has relationship with health. The field of the health is extremely broad, so we just summarized it into two parts, one is the cause of unhealthy, one is the restore health. Apart from those physical injuries, food safety is a major risk of un-wellbeing, so to effectively improve the accuracy and efficiency of the detection technology of contaminants is very important, where metal-organic frameworks (MOFs) can improve this. Fluorescent imaging and other fluorescent biosensors have great abilities and potential in clinical technology and biomedical field to help to restore healthy. While not just these fluorescence technologies themselves need to discuss, fluorophore is also an essential part. As most fluorescence technologies need to use it. As a result, this research shows the application of fluorescence-based analysis methods in different fields, including food safety and biomedicine.
Construction of Ecological Conservation and Assessment of Its Impact on Environment
Authors: Wu Yifan
Published: July 2022

The Chinese government has always been committed to implementing the strategy of sustainable development, improving the level of ecological civilization and promoting the transformation of economic and social development to all-round green growth. With the help of the Chinese government, China's Saihanba forest farm has recovered from the desert and has become an eco-friendly green farm with stable sand control function, and has begun to achieve a higher goal of ecological restoration. Saihan dam plays an important role in resisting wind and sand, protecting the environment and maintaining ecological balance and stability. By comparing and analyzing the environmental conditions before and after the restoration of Saihan dam, and building a mathematical model to evaluate the impact of Saihan dam on Beijing's ability to resist sand and dust storms, we plan to extend the ecological protection model of Saihan dam to the whole country. What geographical locations in China need to build ecological areas (quantity and scale) what is the impact on achieving China's carbon neutrality goal.
The principle and simple design applications of blue LED
Authors: Zhang Chonghao
Published: July 2022

InGaN/GaN blue light-emitting diode (blue LED) is the most commonly investigated and applied LED for blue laser, optical memory, general luminescence, and the candidate for clean energy. However, limited by the efficiency droop, the luminous properties of InGaN/GaN blue LED still faces plenty of challenges. This paper aims to investigate the principle of strains on internal quantum efficiency of InGaN/GaN blue LED, as well as provide simple materials and structure design for high luminous efficiency and harmless blue LED based on the composite of InGaN/GaN. On this basis, the properties are simulated and testified based on the program TracePro Application. By tuning up the supper lattice on m-plane instead of c-plane, the polarization electric field will be eliminated and thus the efficiency droop will be improved. Besides, a backlight structure of the combination of cyan and hyacinthine LED chips is launched by grating ZnSeTe quantum dots and ZnSe quantum dots on the surface of p-GaN and this backlight structure design is proved to be high luminous and harmless to human eyes. These results shed light on possible ways to enhance the luminous properties and safety of InGaN/GaN blue LED both in materials aspect and in structure design.
The Progress of the Quantum Hall Effect
Authors: Yu Xiaoxiao
Published: July 2022

Contemporarily, various novel phenomena related to quantum Hall effect and many extended versions of Hall effects were discovered. This big family of Hall effect has given rise to the development in many fields including condensed matter physics, and relevant research (e.g., topological insulators, topological superconductors), remains a hot topic nowadays. This paper will focus on the application of quantum Hall effect in state-of-art researches, especially in superconductor-related field. Information retrieve and literature analysis are the main methods used in this review. First, a brief introduction of the definition for different kinds of Hall effects will be given. Afterwards, applications of quantum Hall effect will be discussed, including an unconventional CDW discovered in a kamoge superconductor, Josephson Junction presenting a quantum Hall effect and the quantum anomalous Hall effect-based Josephson Junction. Subsequently, the limitations in these researches and problems remaining to be solved by further research will be shown. These researches have great significance in achieving quantum computation. Overall, these results shed light on guiding further studies for Hall effect.
Gamma ray and Electron- positron pairs generation based on ultra-intensity and ultra-short laser
Authors: Wang Ruiqi
Published: July 2022

With the rapid development of the ultra-short and ultra-intensity laser techniques, the intensity of laser has reached 1023W/cm2, which offers a tool to investigate the laser matter interaction in QED regime. On this basis, it is feasible to generate gamma rays and electron positron pairs in terms of strong field laser plasma interaction. In this paper, the state-of-art configuration and schemes for above particles generation are discussed. Besides, the limitations as well as future direction are also analysed. These results shed light on further exploration of laser-plasma phenomena in strong field physics.
Investigation of Advanced GaN and SiC Semiconductor Materials: Key Characteristics and Diverse Applications
Authors: Yu Xitian
Published: July 2022

The development of wide band gap (WBD) semiconductor materials has gained enormous attention to, and among all the materials, gallium nitride (GaN) and silicon carbide (SiC) are at heart because of their high-temperature endurance and enormous potential in high voltage uses. This article summarizes both materials' basics and current status, starting from comparatively illustrating their distinctive merits, such as high breakdown voltage and excellent thermal conductivity. Followed up is a critical overview of various facile preparation strategies, and the advantages and disadvantages of the methods are concluded shortly. Finally, the real-world applications of these two materials are presented and analyzed, and both similar and unique uses for GaN and SiC are illustrated. The bright future of both materials is concluded, and this article clarifies the information needed for both materials throughout the progression.
Optimal adjustment of the FAST active reflecting surface based on a working paraboloid adjustment model
Authors: Kong Zhangyi , Huo Tianyuan , Nan Chenyu
Published: July 2022

FAST is the world's largest single-aperture radio telescope developed independently by China, which adopts innovatively the active reflecting surface technology to realize real-time adjustment of the reflecting surface and dynamic tracking of celestial objects. In this paper, the ideal paraboloid for observing celestial objects is investigated in conjunction with the adjustment factors of the reflecting panel, and the adjustment of the working paraboloid is optimally designed. To address problem one, this paper first cognizes the ideal paraboloid, establishes four criteria that the ideal paraboloid should satisfy, and simplifies the problem in two dimensions based on symmetry. For problem two, this paper firstly establishes a mathematical model for solving the equations of the ideal paraboloid in the general case based on the results of problem one, using the coordinate transformation method.
The Recent Progress and State-of-art applications for Ultraviolet Photodetectors
Authors: Liu Yuang , Su Zesen , Yang Tianyu
Published: July 2022

Contemporarily, ultraviolet photodetectors have already been successfully applied in many advanced areas, including astronomy, disaster forecasting, fire alarm, marine oil pollution monitoring, biomedical and more. Nowadays, many researchers are focusing on developing the wide bandgap UV photodetectors which possess advantages in fast response speed, high sensitivity, self-power, etc. This paper will discuss principle, types, and component of ultraviolet photodetectors based on information retrieval and literature analysis. Specifically, vacuum UV detectors, solid-state UV detectors and wide bandgap UV photodetectors are demonstrated. According to the analysis, wide bandgap UV photodetectors have better performance in multiple properties but still be limited with several drawbacks, included material problems and design issues. Once the material problems and design issues could be overcome, they could replace the traditional UV photodetectors rapidly, which are able to benefit more relevant areas in both military and civilization. These results shed light on guiding further exploration in UV photodetectors current.
The progress of ultra-intensity laser and inertial confinement fusion
Authors: Li Shengbang , Tao Boyan
Published: July 2022

Contemporarily, the world is facing the problem of energy crisis, thus novel approach of energy production is needed to address the problem. Among various new energy scenarios, controlled nuclear fusion is an expected solution. This article will discuss the inertial confinement fusion (ICF) with the recent progress of the state-of-art ultra-intensity laser beams. ICF is a way of controlled nuclear fusion based on the ultra-intensity laser, which is originated in the mid 20 century after the born of nuclear weapons. In order to reach the ignition condition, ultra-intensity laser is compulsory.  With this in mind, this paper discusses the principles and developments of ultra-intensity laser. Subsequently, the milestones and the state-of-art ICF facilities as well as ignition approaches are demonstrated accordingly. Afterwards, the current limitations and drawbacks as well as future outlooks are proposed. Overall, these results shed light on guiding further development of confinement fusion.
Allocation Issue of Asteroid Mining: A Symbolization of Global Equity
Authors: Shen Jiajun , Yu Jiaxin , Lin Jiale
Published: July 2022

Nowadays with the advance of the space exploration and the large-scale utilization of mineral resources, many nations begin to put their eyes on ‘Asteroid Mining’. In fact, the United Nations’ Outer Space Treaty was signed 55 years ago. But with new problems about global equity and interest protection popping up, it’s quite essential to update the original treaty. In order to structure a solid fundamental for our analysis, we firstly build a definition model to define the ‘Global Equity’. We use great amount of indicators searched from OECD and integrate them into four main factors:‘ Resource’, ‘Society’,‘ Economy’ and ‘History’. Through ‘AHP’ and ‘TOPSIS’, we work out the weights of every factor and their sub-indicators. We successfully build the Equity Assessment Model (EI model) and the importance of each factor appears immediately. Then we calculate the EI value of each nation which shows the overall condition of the nation in the course of resources allocation. Based on the data we get, we classify the nations into three grades: ‘Top Qualified Countries’, ‘Rest Qualified Countries’, ‘Unqualified Countries’. The explanation will be given later. So how are the mineral sources allocated in the market? We think the mining countries should get rewards to cover the cost of researching and exploring. Also, the ‘Unqualified Countries’ should be aided and given some welfare and discount. The rest countries purchase their share of minerals regularly. Different countries have different shares of mineral resources they can purchase based on the Allocation Model we build. We use the Regression Analysis of input-output and Copulglas functionto help build the model. The share scheme and welfare scheme are two features of our analysis. After that, we jump to the conclusion that the economy and even the whole world will get better after the asteroid mining is implemented.
Recent Progress and state-of art applications of Perovskite Solar Cells
Authors: Sun Chongyi
Published: July 2022

Contemporarily, perovskite solar cells have become one of the hot topics among new energy. Currently, the highest photovoltaic conversion efficiency of perovskite tandem cells has reached 29.8%. Compared with silicon-based solar cells, which currently occupy most of the market share, they have a wider absorption band gap, and lower manufacturing cost and simpler manufacturing process, making them a strong candidate to replace silicon-based cells in the future. However, the commercialization of it is still hampered by its poor stability. This paper reviewed the state-of-art results from literatures, including the selection of materials for transport layers and the performance of different types, and summarize the limitations from the perspective of the working principle the cells. Finally, the current status of perovskite solar cells is summarized and the outlooks are put forward. These results offer suggestions for further studies focusing on perovskite solar cells.
Theoretical Progress and the state-of-art models for Plasma Quantization
Authors: Miao Haixi , Shi Hanrui
Published: July 2022

Plasma, known as the fourth state of matter, attracts the curiosity of scholars. Specifically, this paper will discuss the quantization models and theoretical progress for plasma, starting with the brief conclusion of fruition of former researchers. In addition, the novel perspective for the process will be proposed in order to expansion of investigating plasma relevant effects. According to the analysis of the quantization process of plasma, (i.e., the Vilasov equation describing the basic motion), the basic theory of quantum plasma is introduced. Moreover, the state-of-art models and results on the quantization of plasma field and interstellar plasma will also be introduced. These results shed light on guiding further exploration on nonlinear plasma physics.
VQE Algorithm in Quantum Chemistry
Authors: Tan Xiangjun
Published: July 2022

For a complex quantum system, the dimensionality of the Hamiltonian   grows exponentially with the size of the system, making it difficult to perform fast large-scale simulations and calculations on a classical computer. The first Variational Quantum Eigenvalue solver (VQE) proposed by Peruzzo et al. This gives the possibility of highly accurate molecular simulations and calculations in the field of quantum chemical computing. VQE is roughly based on the principle of using a quantum computer and set up a trial wave function |ψ(θ)⟩=U(θ)|ψ0⟩ to measure the energy expectation of the wave function |ψ(θ)⟩ at the corresponding initialization parameter, and then using a classical optimization algorithm to iterate θ0→θn over the energy to minimum until convergence. The significance of this paper is to verify the accuracy as well as the feasibility of the VQE algorithm for the calculation of LiH molecules in STO-3g basis, and to perform an error analysis and to verify the exponential acceleration of the classical algorithm implementation. These results shed light on guiding further exploration focusing on quantum computingt.
The Recent Progress and the state-of-art applications of Perovskite Solar Cells
Authors: Li Hongkun
Published: July 2022

With the awareness of using clean and sustainable energy, the utilization of solar power is of great importance in human society. Following the trend, solar cells are required to have higher and higher power conversion efficiency. Contemporarily, perovskite materials, as a new type of materials for construction of solar cells, exhibits great potential to have high efficiency. This article focuses on the methods on improving power conversion efficiencies of perovskite solar cells and discusses the limitation of recent technologies and industrial applications, and the future prospect of perovskite solar cells. To be specific, all the methods are focusing on the selection of materials suitable for cells design, from CsSnI3 to lead-based organic materials, the efficiencies have increased significantly. The method of stacking perovskite solar cells to make tandem solar cells improved efficiencies among all the methods. Meanwhile, the toxicity, low stability and difficulties in large-scale application are the main limitations for perovskite solar cells. For the future studies, it is important to search for materials with low toxicity and high stability. The technology for improving efficiency of large-scale solar cells is also required. These results provide a guideline for the future study in perovskite solar cells.
Jane Newland, Deleuze in children’s literature
Authors: Grimaldi Camilla
Published: July 2022

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Implications of Robotic Surgery
Authors: Starble Eric
Published: July 2022

The interest that I have in robotic surgery stems from the discrepancies between literature at the time that my current hospital purchased their system and the aggressive marketing campaign from the parent company. In urology, the robot is marketed as “nerve-sparing” during prostatectomies and in cardiac it allowed more dexterity or finer motor control. The bulk of the concerns center around issues such as system resetting; electrosurgical arch; increased surgical time; prolonged carbon dioxide insufflation; unnecessarily extended amounts of time under anesthesia; and extremely high costs to purchase and maintain the system on site. A cost-based analysis and a surgical time consideration of robotic versus laparoscopic and open procedures disprove the regularly cited benefits of using a robotic console over the trained surgeon hands for not only surgical risk but financial benefits to both the facility and patient. I gathered records of robotic, laparoscopic and open procedures, the time each takes, the financials for instrumentation and the legal issues or complication associated for each. The robotic technique is a greater cost than any procedure comparable and at an increase of surgical and/or anesthetic time. The greater the anesthetic time, the more potential harm to patients. The greater the surgical time, the higher the risk from increased pneumoperitoneum CO2 insufflation on the cardiovascular and respiratory systems. The higher the cost ratio, the less benefit for the practicing facility. Legalities are a new issue to consider when the robot or the parent company is found at fault considering the health insurance agencies have taken a stand on compensation for only the diagnosis and not the techniques or technology utilized for that treatment.
Evaluating Eating Disorders among Medical Students in Baghdad, Iraq
Authors: Shanshal Aisha Muthanna , Hussain Saad Abdulrahman , Mahmoud Mustafa Sameer , Saleh Maha Ali , Salih Omar Abdulwahid
Published: July 2022

Background: Eating disorders represent a psychological problem characterized by abnormal eating behaviors and related emotions and thoughts. Aim: The study aims to assess the prevalence of eating disorders among medical students in Baghdad, Iraq. Methods: A cross-sectional study was conducted in medical departments that include medicine, dentistry, and pharmacy disciplines from January 2021 to March 2021 using an English version of a structured questionnaire. About 552 medical students participated in this study. Results: The study showed that in some individuals with normal Body Mass Index values, 64.47% suffered from eating disorders as diagnosed by EAT-26 while according to SCOFF, 23.5% of normal individuals suffer from eating disorders. Overweight individuals are more likely to have eating disorders than underweight individuals. According to SCOFF, 33.44% of the overweight and 4.18% of underweight individuals scored above the cutoff value. They were likely to have eating disorders. Similarly, in accordance to EAT-26, 19.70% of the overweight individuals and 9.48% of the underweight individuals were likely to have eating disorders. Conclusion: Many Iraqi medical students are predisposed to having eating disorders, with females being more vulnerable than males. To reduce the frequency of eating disorders among Iraqi medical students, a variety of initiatives and strategies are required.
De kerkelijke Laeyendecker
Authors: Heffernan Brian
Published: July 2022

Leo Laeyendecker was not just a renowned sociologist, he was also a prominent voice in late-twentieth-century Dutch Catholicism, first as an Augustinian priest and then as a progressive public intellectual. This article offers a biographical sketch of the Catholic Laeyendecker, and focuses specifically on his performance of the roles of priest-scientist and Catholic public intellectual. He became a sociologist at the behest of his superiors, who hoped he would be able to assist church leadership with scientifically sound policy advice. But once he had completed his training, his objective as a priest-scientist was to use sociological analyses to convince his fellow friars and Catholics that the realities of modernity militated for church renewal. As a public intellectual, he continued to advocate a progressive agenda in an era in which church leaders were retreating from the specific reformist stance of their predecessors. This new context prompted another change of role, from that of a voice within the wider church community to that of theorist of its progressive wing.
Effects of Lantana camara invasion on plant biodiversity and soil erosion in a forest watershed in lower Himalayas, India
Authors: Sharma Pawan , Singh Prem , Tiwari A.
Published: July 2022

Establishment of a forest watershed using bioengineering conservation measures resulted in gradual decrease in soil loss from 37 Mg ha -1 yr-1 to just 1.0 Mg ha-1 yr-1 during the period 1964 to 1985. This reducing trend however reversed after the invasion and proliferation of Lantana camara causing a change in vegetation during the period 1990-2000. Lantana camara and Murraya koenigii became the most dominant plants with highest Importance Value Index (IVI), while many native shrubs like Nyctanthes abortristis, Adhatoda vasica, Carissa opaca and Rubus biflorus drastically declined during this period. L. camara attained the highest biomass, causing drastic reduction in the grass biomass. The IVI of Acacia catechu and Caesalpinia sepiaria increased, while that of Dalbergia sissoo, Acacia nilotica, and Acacia modesta decreased. There was a reduction in evenness index and Shannon index of diversity, while the Simpson index of dominance has increased during this period. The native vegetation like Randia dumatorum, Grewia optiva, and Acacia leucophloea showed a negative inter-specific interaction with L. camara.
Pest problems in root-trainer raised forest nurseries of selected species in Kerala
Authors: Varma R. , Swaran P.
Published: July 2022

In recent times, root trainers are being employed to produce the planting stock required to raise forest plantations. In the root-trainer raised nurseries, instead of soil, the potting medium is often vermiculite or compost. Though information on insect pests attacking conventional forest nurseries is available, we lack data on the nature and severity of pest attack in root-trainer raised nurseries. Data on this aspect was generated for three species – teak, eucalypts and acacias. In teak nurseries, the mite, Tetranychus sp. caused damage resulting in scorchy leaves and subsequent mortality in some cases. Other than the mite, the teak skeletoniser (Eutectona machaeralis), the Teak defoliator (Hyblaea puera) and the White fly (Aleurodicus sp.) were the insects recorded as feeding on teak foliage. An unidentified scolytid beetle boring the stem was the only insect problem noticed in Acacia auriculiformis. In the case of eucalypts, two leaf feeding beetles, Colasposoma sp. and Microserica sp. were observed to cause damage. These beetles are not reported earlier as attacking eucalypts. In general, the present observations indicate very less pest problems in root trainer raised nurseries than in conventional forest nurseries. Because of the lack of contact with soil, some of the soil insects like termites, white grubs etc. have not posed any problem in root trainer raised nurseries.
Model Hubungan Karakteristik Arus Lalu Lintas Pada Ruas Jalan Abdullah Silondae Kota Kendari
Authors: Florentinus La Derita , Lakawa Irwan , Sulaiman Sulaiman
Published: July 2022

Abdullah SilondaeRoad is a type of 4 lane 2 undivided road (4/2 UD)which is a pathway to urban activities, education, trade and. Theresearch objective is to model the relationship of trafficcharacteristic parameters on the Abdullah Silondae Road sectionbased on traffic studies, including studio volumes and vehicle speedswhich are classified into three groups namely motorcycles (MC), lightvehicles (LV) and heavy vehicles (HV).The variables used are traffic characteristics, namely volume, speed,and density. To determine the formulation of the characteristicsrelationship, three models are used, among others Greensield,Greenberg, and Underwood.From the results of the study concludedthat the Greenshield model is the best model with the value of R ² =0.99 with a mathematical equation the relationship of speed-density,volume-density, and volume-speed as follows: S = 41,3 -0,15.D, V =41,3.D-0,15.D², V = 273 . S – 6,6.S².
E-Service Quality dan Repurchase Intention pada Travel Agent Online di Wilayah DKI Jakarta
Authors: Marina Sandriana , Setiawati Aswanti , Salehati Nurun Ala
Published: July 2022

This research aims to identify the impact of e-service quality on repurchase intention of on-line travel agencies, especially in DKI Jakarta. On-line travel agency is a travel website (e-commerce) providing various services related to tourism, such as: on-line transportation and hotel bookings and entertainment. On-line travel agency also serves as an alternative option in addition to the conventional ones. This research employed quantitative approach. The data was gathered by distributing on-line questionnaire to 96 online travel agencies users as the samples. The data was then analyzed by using simple linear regression through SPSS 23. The result shows that e-service quality is in good category while repurchase intention is in very good category. The correlational value between e-service quality and repurchase intention is in the strong category and the percentage that shows e-service quality affects significantly positive to repurchase intention of 62,1% while 37,9% as the other variables not examined in this research.
Kartel dan Tarif Tiket Perusahaan Penerbangan Terhadap Persaingan Usaha Penerbangan di Indonesia
Authors: Sari Mustika , Saribanon Euis , Ghafar Abdul
Published: July 2022

The purpose of the study is to determine whether there is a direct and indirect influence between cartels and ticket tariffs of airlines business competition in Indonesia or not. The problems in this study were due to the high ticket price and public’ indication and suspicions of domestic airlines cartels practicing. The method used in this research was path analysis, to determine the direct and indirect effects of each variables. The result of the study states that the direct and indirect effect between the cartel, ticket rates, and business competition variables are equally significant. This could be seen from the result of the hypothesis analysis which state that the coefficient is above 0.300. It means that the influence is very strong. From some previous research of monopoly and price, it was found that monopolies in the aviation industry are often unavoidable because they protect airlines from losses. The result also shows that several customers in different levels do not matter about ticket price. For this type of passengers, they only need the route and flight schedule.
Cost Index dan Dampaknya Terhadap Efisiensi Biaya Operasional Pada B777-300 ER (Studi Kasus Garuda Indonesia)
Authors: Ozali Imam , Gugat Rudy Max Damara , Prasidi Abi
Published: July 2022

In this challenging situations, Garuda Indonesia remains optimistic about the future by setting the direction of QuickWins strategy and the values of “One Family, One Nation, One GarudaIndonesia” in managing the company.These strategies have become the strong basis for GarudaIndonesia to develop and expand in the subsequent years. Thebusiness management in 2019 was also strengthened by the values of One Family, One Nation, One Garuda Indonesia, therefore, Garuda Indonesia could continue to provide the best service for Indonesia.Garuda Indonesia is also trying to implement the key work programs to develop revenue beyond the aviation business that would become a strong foundation for Garuda Indonesia to develop and expand in the next period. The purpose of the research is to determine the Cost Index and its impact on operational cost efficiency in B777-300ER (Garuda Indonesia case study). This research used the desciptive qualitative approach. The data was collected through observation, interview and documentation. The analysis technique used in this research was navblue cost index. The results of the study would be used to determine the extent of the cost index, the impact of increasing efficiency of B777-300ER operational costs, and in order to help companies making the right decision.
Formulasi Strategi Penggunaan Jenis Pesawat PT Garuda Indonesia Dalam Persaingan Tahun 2019
Authors: AN Charles , Ramadhanny R. F.
Published: July 2022

PT Garuda Indonesia should pay attention to which routes contribute significantly to the company. Therefore, it is necessary to formulate a strategy for the flight route, one of which is the use of aircraft types that are the company's primary consideration for achieving profit targets. The problem in this research was how to formulate strategies for the use of PT Garuda Indonesia aircraft types. Garuda Indonesia CGK-SIN-CGK route in 2019. The level of competition of PT Garuda Indonesia on the CGK-SIN-CGK route ranked second in the market on this route. According to CPM's matrix, the company ranks second. In 2018 on the route CGK-SIN-CGK, PT Garuda Indonesia used Airbus 330-200, Airbus 330-300, Boeing 737-800, Boeing 777-300 and Boeing 737-Max, 8 aircrafts with a total frequency of 6,315 flights and 844,714 pax. The average passengers that could be transported was 134 pax / flight and actually could be transported sufficiently by a narrow-body aircraft, that was, the Boeing 737-800 with the capacity of 162 seats (12C / 150Y). In the decision stage, the QSPM matrix was used. The product development strategy that can be implemented is that the company uses Boeing 737-800NG aircraft with a low total operating cost of the aircraft as the highest priority and followed by the second priority. In other words, the company uses a large-capacity 330 series Airbus aircraft.
Efektivitas Penerapan Vessel Traffic Services (VTS) di Selat Sunda terhadap Keselamatan Pelayaran
Authors: A. Syafaat Buce , Sukmawati Eka , Muh. Akib Irawati , Mayseptyana Annik , Sugiawiharja Egi
Published: July 2022

The purpose of this research is to identify the effectiveness of VTS implementation in Sunda Strait and to determine the factors of VTS Merak Station operational staff obstacles in carrying out the work instructions for monitoring and identifying ships disturbances to formulate immediate action in order to ensure the shipping safety. This descriptive method research used qualitative approach by conducting an analysis of the VTS implementation suitability with the regulations at Merak Station. The regulations have been set by the Directorate General of Sea Transportation of the Ministry of Transportation in terms of VTS service SOP documents congruence with operational staff qualifications. The results show that the implementation of the VTS service at Merak Station has been carried out in accordance to the SOP though it is still facing obstacles; shipping companies and ship’s crew who do not fully understand the purpose of applying VTS in Sunda Strait. Moreover, not all VTS staff are certified related to navigational knowledge/skills (eg. VTS certificates) and to Nautical/Technical knowledge/skills (eg. ANT Certificate). Based on the research results, it is recommended that a system to communicate and coordinate should be built between regulators; the Navigation Directorate of the Directorate General of Sea Transportation and stakeholders, to ensure that VTS services at Merak Station could be implemented based on the regulations.
Evaluation of the Implementation of Traffic on the Road in the School Safe Zone (ZoSS) in Depok
Authors: Setyawati Aswanti , Sari Mustika , Sidjabat Sonya
Published: July 2022

The implementation of the School Safe Zone (ZoSS) provision program in the Depok City area for early childhood education, basic education and education that has not been implemented optimally is in accordance with the objectives of implementing the ZoSS program. The purpose of this research is to increase traffic awareness in the area to school, where many parents, teachers and children do not care about good driving and care for the safety of themselves and others. The problem in this study is the lack of public awareness of how to get to the school area safely. The research method uses descriptive qualitative data collection methods by interviewing children who go to school in Depok and secondary data from journals. The results showed that the application of ZoSS in the city of Depok has been implemented with priority in 7 elementary schools (SD) with traffic signs and officers optimally.
Peranan Inovasi Dan Komunikasi Marketing Terpadu Dalam Keputusan Memilih Perguruan Tinggi (Kasus ITL Trisakti)
Authors: Suminar Ratna , Wahyuni Sri
Published: July 2022

This study was conducted in ITL Trisakti Jakarta in order to analyze the effect of the application of IMC and Innovation towards Purchase Intention of university selection. The study was conducted using quantitative-hypothesis testing research. The validity and reliability testing research was conducted using SPSS program, while the data was analysed using Structural Equation Modelling (SEM). The result of the study shows there is not significant influence of innovation to the respondents’ decision making on university selection. However, there is a significant influence of the IMC strategies applied to the respondents’ decision making. Furthermore, respondents’ quality perception, as the intervening variable, shows direct and significant influence to the respondents’ decision making on university selection. Specifically, internet and marketing evenst have big contribution to the application of IMC in ITL Trisakti, despite; Advertising and Personal Selling show the least. Therefore, ITL Trisakti is expected to develop the marketing strategy in order to get the best result.
Produktivitas Combined Terminal Trailer Bongkar Muat Petikemas di Teluk Lamong
Authors: Shalawatika Syerehan Maghriba , Apriyadi Darmawan , Rahmawati Aisyah
Published: July 2022

PT Terminal Teluk Lamong is a subsidiary of Pelindo III which is an expansion of Tanjung Perak Port which is engaged in container services. The aim of this research is to analyze the effect of the availability and waiting time of a combined terminal trailer on the loading and unloading productivity of PT Terminal Teluk Lamong. The problem of this research is the inadequate number of combined terminal trailers, the occurrence of waiting trucks, inadequate number of combined terminal trailers, changes in location, weight of containers transported by CTT, the high level of damage to the combined terminal trailer, difficulty in spare parts or spare parts. The results showed that there was a significant effect between the availability and waiting time of CTT on loading and unloading productivity where the correlation coefficient test showed 0.848 which means that there is a very strong influence. Meanwhile, the correlation coefficient of determination test shows that the influence between the availability and waiting time of CTT and loading and unloading productivity is 71.9% while the remaining 28.1% is influenced by other factors.
Studi Komparatif Operasional CRJ 1000 dan B 737-800 Rute CGK-BWX-CGK
Authors: Setiatama Muhammad Widya , Chairuddin Irwan , Harahap Vica Nurhayani
Published: July 2022

The aim in this study was to compare the level of efficiency and advantages of operating the Bombardier CRJ 1000 and Boeing 737-800 NG aircraft on the Jakarta-Banyuwangi-Jakarta route in order to face competition between airlines. Selection of aircraft types with a larger seat capacity is important to increase market share. However, it should be approved whether the technical operational takeoff weight, operational costs, and payload of the selected aircraft can generate optimum profit. Hence, the study is designed to solve these problems by using a comparative qualitative study with the research subjects being the airlines owned by the Government of the Republic of Indonesia and collecting secondary data from company documentation. Data analysis tools used are payload allowable calculation data based on aircraft structure and aircraft performance, as well as the BCG (Boston Consulting Group) matrix to determine the company's position in terms of market growth and market share. The results of this study indicate that the Bombardier CRJ 1000 aircraft has a small but efficient capacity, while the operation of the Boeing 737-800 NG incurs higher costs. However, with a large load capacity, the Boeing 737-800 NG can generate greater profits than the Bombardier CRJ 1000. Garuda Indonesia's position in the BCG matrix is in the star quadrant, with a relative market share value of 0.74 and an average market growth of 78.04.
The Performance of Aviation Security Personnel Services at Sentani Airport
Authors: Fauzi Muhammad , Setyawati Aswanti , Kurniawan Jermanto Setia
Published: July 2022

Some of the efforts that can be made to improve aviation security performance are by implementing security screening and airport security programme. The study was conducted at Sentani Airport in 2019 using quantitative methods, with the number of research samples taken in total saturation of 50 personnel at Sentani Airport. Data collected through instruments in the form of statement sheets with ordinal scale models that have been tested, linear regression, partial or simultaneous. The research is using path analysis technique. Based on the results of the study show that security screening has a direct effect on flight aviation security of 2.224 and there is a direct influence of airport security programme on Aviation Security Performance of 4.186 and there is a significant positive effect of security screening on airport security programme is 5.491 and based on the results of the study shows that Security screening indirectly has an effect of 1320,879 on Aviation Security Performance through mediation of Airport Security Programme.