bluuebunny/crossref_metadata_2025 huggingface dataset:
Status of ultra-pure scintillating crystal growth for rare process experiments by CUP
Authors: Ra Se Jin , Kim Dae Yeon , Lee Cheol Ho , Son Ju Kyung , Shin Keon Ah , Gileva Olga , Choe Jun Seok , Kang Woon Gu , Lee Eun Kyung , So Jung Ho , Lee Moo Hyun , Park Hyang Kyu , Kim Hong Joo , Kim Yeong Duk
Published: March 2020

Center for Underground Physics (CUP) at Institute for Basic Science (IBS) has been operating the COSINE-100 for WIMP search and the AMoRE (Advanced Mo based Rare process Experiment) for neutrinoless double beta decay search. Both experiments are using ultra-pure scintillating crystals at the underground facility to avoid the cosmic muon background.

In order to grow the ultra-pure crystals, the raw materials are purified and their radioactive levels are measured using ICP-MS and HPGe. A clean-room facility has been constructed to avoid external contaminations during the crystal treatment procedure after the growth.

We present the current status of the crystal growth facility and discuss further about next levels for the ultra-pure crystal production in near future.
Drift field generation with Cockcroft-Walton voltage multiplier in xenon gas for AXEL 0vββ search detector
Authors: Yoshida M , Ban S , Hirose M , Ichikawa A K , Iwashita Y , Kikawa T , Minamino A , Miuchi K , Nakadaira T , Nakajima Y , Nakamura K D , Nakamura K Z , Nakaya T , Obara S , Sakashita K , Sekiya H , Sugashima B , Ueshima K
Published: March 2020

For noble gas Time Projection Chambers (TPCs) in the field of rare event searches, operation of high voltage to generate an electric field is a key point. We designed a new structure of electrodes to shape a strong and uniform drift field without electric discharge, in which electrodes of two different radius are used. We also developed Cockcroft-Walton voltage multiplier as a high voltage generator inside a pressure vessel. We achieved −30.0 kV output and examined such kind of voltage generator is feasible as a high voltage supplier in a TPC.
Neutrino masses beyond the minimal seesaw
Authors: Cepedello Ricardo , Fonseca Renato , Hirsch Martin
Published: March 2020

The simplest possibility to generate small Majorana neutrino masses is the seesaw mechanism. However, the smallness of the observed neutrino masses can also be understood, if neutrino masses are generated by higher-dimensional operators and/or at higher loop level. In this talk recent work on systematic classifications of higher-dimensional and radiative neutrino mass models is summarized. Two particular classes of special genuine loop diagrams, i.e. diagrams which can lead to genuine neutrino mass models only under some specific, well-defined conditions, are also discussed.
Scalar triplet leptogenesis with S
3 symmetry
Authors: Mishra Subhasmita , Giri Anjan
Published: March 2020

Extension of standard model with simplest discrete symmetry S
3 is conisidered to explain the neutrino masses and mixing consistent with the current observations. The particle content is extended by addition of right handed neutrinos and scalar triplets and explain the observed data in the neutrino sector. We mostly focus here on baryogenesis from the decay of a heavy triplets in the presence of right-handed neutrinos. The scenario also provides us the viability of TeV scale particles in the framework in the context of future collider searches of lepton flavor violation.
R&D on the gas injection system of Beam Induced Fluorescence Monitor toward MW beam power at the J-PARC Neutrino Beam-line
Authors: Nakamura A. , Koshio Y. , Friend M. , Sakashita K.
Published: March 2020

A Beam Induced Fluorescence (BIF) monitor is being developed as an essential part of the monitor update toward MW beam power operation at the J-PARC neutrino beam line, where a 30 GeV proton beam is extracted, bent and struck onto a 90-cm-long graphite target to produce an intense and nearly pure muon (anti-)neutrino beam for the Tokai-to-Kamioka(T2K) experiment. A BIF monitor can measure the proton beam profile non-destructively and continuously spill-by-spill with fluorescence light produced by proton-N
2 interactions. In order to generate enough light to measure the profile precisely, it is necessary to temporarily increase the vacuum pressure near the BIF interaction point up to ~ 10−2 Pa during each beam spill while keeping the average pressure low (10−4 to 10−6 Pa) at other locations to protect vacuum equipment. Therefore, R&D of a pulsed gas injection system satisfying these requirements is in progress. We will report the recent R&D status of the gas injection system and prospects toward operation of a prototype monitor which we plan to install this fall 2019.
Small scale ring laser gyroscopes as environmental monitors
Authors: Bosi Filippo , Di Virgilio Angela D. V. , Giacomelli Umberto , Simonelli Andrea , Terreni Giuseppe , Basti Andrea , Beverini Nicolò , Carelli Giorgio , Ciampini Donatella , Fuso Francesco , Maccioni Enrico , Marsili Paolo , Stefani Fabio
Published: March 2020

Inertial sensors are of interest for many different applications, and at present ring laser gyros with area larger than one square meter are the most sensitive ones; a few ring lasers with area between 15 and 72 square meters are operative with sensitivity of the order of tens of prad/s in 1 second measurement and high duty cycle. Smaller scale rings are severely limited by the back-scattering induced coupling between the counter-propagating beams, that in presence of just the angular rotation velocity vector of the Earth, eventually lock together the two frequencies making the device blind. The problem is usually overcome by increasing the frequency distance between the two modes, i.e. increasing the size of the ring. Even when the RLG is large enough and the two modes are not locked, back-scattering affects the signal. However, this is not a fundamental limit, and we have recently shown that it can be analytically solved. In this paper the sensitivity of a ring laser with a square side of 1 m will be discussed.
Gravitational Waves Detectors
Authors: Ricci Fulvio
Published: March 2020

The search for direct detection of Gravitational Wave made a huge step forward in the years between 2015-2017. After the first detection signals from the coalescence of binary black hole systems, we had both the great success of the LISA pathfinder mission and the detection of the first event due to a neutron star - neutron star merger tagged as the birth of the multi messenger astronomy. A new era is now opened where the GW events are detected routinely by the triangular network of LIGO and Virgo that in the nearest future will be enlarged by including KAGRA, the fourth detector in Japan. Here we review the evolution of the existing detectors focusing our attention essentially on the middle and long-term evolution of those on the Earth.
Alpha-ray imaging chamber based on a micro-TPC in a low radioactivity structure
Authors: Ito Hiroshi , Miuchi Kentaro , Kobayashi Kazuyoshi , Takeuchi Yasuo , Nakamura Kiseki D. , Ikeda Tomonori , Ishiura Hirohisa
Published: March 2020

An α-ray imaging chamber has been developed based on a gaseous micro-time-projection chamber with a low-α emission μ-PIC in a low radioactivity structure. The detector offers the advantage of position sensitivity, which allows to image the α-ray contamination for the sample. It measures the α-ray rate in the sample region and a background region at the same time, thus that the net α rate from the sample can be evaluated efficiently by subtracting these rates from each other. In this work, the measurement results for several samples using the detector is provided.
Development of a cryogenic alpha-screening facility at the shallow underground laboratory at TUM
Authors: Kinast Angelina , Mondragon Elizabeth , Erb Andreas , Langenkämper Alexander , Kaznacheeva Margarita , Ortmann Tobias , Pattavina Luca , Potzel Walter , Schönert Stefan , Strauss Raimund
Published: March 2020

A precise measurement of the radio-purity levels of the CaWO4 crystals used for both the CRESST and the NUCLEUS experiment, is fundamental for a better background understanding. The sensitivity of HPGe detectors is not sufficient to the excellent radio-purity levels of the CaWO4 crystals produced in-house at the Technische Universität München (TUM). We report on a cryogenic α-screening facility which will provide a method to determine the radio-purity of this crystals by measuring the alpha-decays with a high precision, taking advantage of the unique experimental environment of the shallow underground laboratory (UGL) of the TUM.
Radioassay and Purification for Experiments at Y2L and Yemilab in Korea
Authors: Lee Moo Hyun
Published: March 2020

Two major rare-process search experiments, COSINE-100 for WIMP dark matter and AMoRE for neutrinoless double beta decay, have been running at the Yangyang underground laboratory (Y2L) in Korea for about four years. In order to measure radio-activities of materials in both experiments, a number of ultra-low radioactivity measurement detectors have been developed and are now operational. For radioassays of raw materials and detector components, an ICP-MS, an argon gas ionization counter, and a number of HPGe detectors are being used. Three silicon PIN diode-based radon chamber detectors have been either upgraded or constructed for accurate measurements of atmospheric radon in a radon reduction system. A fourteen element HPGe detectors array was installed in 2016 for more sensitive measurements and larger sample capacities than those could be tested in two single crystal HPGe detectors. Since the Y2L space is too small to accommodate the next phases of both experiments, a new underground laboratory, called Y emilab, is being constructed in Jeongseon, Korea with a factor of ten more space (~2,800 m2) and a ~1,100 m overburden compared to ~200 m2 and ~700 m at Y2L. The future experiments require detector materials with substantially lower background levels than those in the current ones. Various types of scintillating crystals such as CaMoO4, Li2MoO4, and NaI(Tl) are being grown with purification methods specifically developed for the raw materials. A summary on radioassay and purification results for experiments at Y2L and Yemilab in Korea will be presented.
Link between modern building and Kediri’s tradition: An idea to develop teaching-learning equipment
Authors: Fiantika F R , Sa’dijah C , Qohar A , Darsono
Published: March 2020

“Simpang Lima Gumul” is monument building which the architecture value, symbolic and esthetical value at Kediri. The “Simpang Lima Gumul” monument is crossing representation of Kediri’s tradition culture and modern building concept. In preliminary study researcher found that student have difficulties for understanding geometry subjects. Contextual teaching-learning based on culture is needed to conserve local culture through transforming it in the context of learning. The aim of this paper is describing indicator of “Simpang Lima Gumul” monument based on semiotics study they are denotation, connotation and meta-languages level. The result is used to develop teaching-learning equipment.
Analyzing mathematical creative thinking ability on sample space materials grade VIII SMP Kanisius Pakem
Authors: Nobilio Pasia Janu Margaretha , Wicaksono Anung
Published: March 2020

This study aimed to describe the learning process using problem-based learning for a sample space material and creative thinking ability while solving the problem. The subject of this study is 16 grade VIII students of SMP Kanisius Pakem. The instrument used in this study were observation sheet, Hypotethical Learning Trajectory (HLT) and the student’s worksheet. The type of this research is design research. The result then can be classified, represented, and the conclusion can be drawn by comparing the result from the Student’s Worksheet and indicators of mathematical creative thinking ability. The result of this study were using problem based learning is the mathematical creative thinking does not require student’s answer to be correct, but more importantly that they have displayed some indicators of mathematical creative thinking while solving the problem.
Design textbooks based linguistic intelligence towards representation ability on statistics
Authors: Setiyani  , Gloriani Y
Published: March 2020

An introduction to statistics is a compulsory subject taken by Indonesian Language and Literature Education (Diksatrasia) students. In this course, whether or not Diksatrasia students who have SMA / SMAK / MA cannot understand mathematical concepts. This is a challenge for lecturers who teach these subjects, because most students do not like mathematics. The results of the development of textbooks are based on linguistic intelligence on the ability of statistical representation. This study uses the ADDIE research and development method (Analysis, Design, Development, Implementation, Evaluation) that has been modified and is limited to the development stage. The results of this study indicate that textbooks are very well used with total expert validation of 94% with very valid interpretations. It can be concluded that the introductory statistical textbook that has been developed can be used in subsequent implementations
Development of evaluation of mathematical communication capabilities based on information technology for junior high school students
Authors: Wahyuni I , Aminah N , Sukestiyarno Y L , Wijayanto A
Published: March 2020

Evaluation is a measure of learning outcomes, so evaluation is a description of the success of learning that has been done by educators. Because of this, the aim of this study was to produce an evaluation tool for IT-based learning using the Wondershare Quiz Creator software with the title of developing an IT-based mathematical communication skills evaluation tool for junior high school students who obtained feasibility and validity as an evaluation tool for mathematics learning, especially in triangular material. rectangular. This research is R & D (Research and Development) research. This evaluation tool was developed with a 4-D learning device development model that was modified to 3-D (Define, Design, Develop). The research instruments used were interview guidelines and questionnaires. Data collection techniques of research conducted were interviews, validation sheets, and response questionnaire sheets. Based on the results of the validation conducted by 3 experts, it was found that the learning evaluation tool that had been made was very valid with an average percentage of 88.89%. While the results of the user response questionnaire that the percentage of the results of the overall student response questionnaire amounted to 88.33% and the percentage of the results of the overall teacher response questionnaire amounted to 91.67%, thus both results of the questionnaire responses have very good criteria. So, the IT-based mathematical communication skills evaluation tool for junior high school students is a practical evaluation tool.
Development of open online ethnomathematics course
Authors: Andy Rudhito Marcellinus , Dwi Kristanto Yosep , Madha Melissa Margaretha
Published: March 2020

Ethnomathematics examines mathematical aspects in a particular culture of a community or region. Ethnomathematics studies are still very potential to be carried out for Indonesian culture that is very rich and diverse. The results of this ethnomathematics study, in addition to increasing knowledge in mathematics and mathematics education, can also be utilized in mathematics learning, especially in the provision of contextual problems. To accelerate and enrich the ethnomathematics study in this broad Indonesian culture, it is necessary to involve many people in all regions of Indonesia. In this study, a virtual class was designed and developed by utilizing the Moodle Learning Management System to facilitate and empower students, teachers, lecturers and observers of mathematics education in conducting ethnomathematics studies. This study aims to design and develop virtual classrooms using Moodle that can facilitate people who will conduct ethnomathematics studies in Indonesia, and analyze the feasibility of the aforementioned virtual classes developed. The present study employs design research, which includes the context analysis phase, literature review, design and development of virtual classes, focus group discussions, limited trials, broad implementation, and implementation analysis. The results discussed in this article include the stage of context analysis, literature review, design and development of virtual classes and focus group discussions.
Analysis of spatial ability of class VIII students Institute Indonesia Yogyakarta Problem Based Learning on topic of cuboids and cubes
Authors: Nanga M Y , Hurit R U
Published: March 2020

The goals of this research were (1) to describe implementation of learning about cuboids and cube nets by using problem based learning (PBL), (2) to describe the spatial ability (spatial representation) of students by using problem based learning about cuboids and cubes nets. The type of research is design research. The research subjects were 28 grade VIII SMP Institute Indonesia Yogyakarta. Data was collected using field notes, documentation and results/answer of LKS 1, LKS 2. The data analysis technique used is qualitative descriptive. The research was conducted in March 2019. The research about the learning process by using problem based learning. The results of the research show that the learning design made in this research is good and the spatial ability of grade VIII students SMP Institut Indonesia Yogyakarta in making cuboids and cubes nets have fulfilled the first indicator (1). This is indicated by the majority of students able to describe cuboids and cubes nets. In addition, some students have not fulfilled the second indicator about identifying cuboids and cubes nets.
Designing augmented reality-based teaching resource of three dimensional geometry
Authors: Mailizar  , Johar Rahmah , Lainufar
Published: March 2020

Indonesia, like many other countries, sees Information and Communication Technology (ICT) as a potential tool for enhancing education and the country is keen to integrate this digital technology in the classroom classrooms. Therefore, since 2004 Indonesian Ministry Education and Culture has stipulated a regulation on the implementing the technology in teaching and learning process. Furthermore, since 2013 Indonesian government implemented a new curriculum emphasizing the use of ICT in the classroom. Recently, Augmented Reality (AR) is one of digital technologies that has received increasing attention for teaching and learning of mathematics. However, lack of research has been devoted to design and develop Augmented Reality-Based teaching resources for secondary school mathematics. This study aimed at designing and developing Augmented Reality - based teaching resources (e.g., lesson plans, student worksheets and Augmented Reality Applets) for teaching Geometry in senior secondary schools. In order to achieve the aim, in this study, we employed a design research model proposed by Plomp and Nieveen. This model consists of three phases that are preliminary phase, prototyping phase and assessment phase. It is important to note that this paper reports results from preliminary. In the preliminary phase we distributed questionnaires to teachers and students which were then followed by interviews. The findings revealed that teachers and students were keen to integrate Augmented Reality technology in teaching and learning mathematics. Furthermore, the teachers expected to be equipped with ICT-based learning resources that support discovery and project based teaching approach. Based on the findings, we designed and developed Augmented Reality applet, lesson plan and student worksheet for teaching three dimensional geometry in senior secondary schools with a project based-teaching approach.
Development of learning instructions on mathematics learning based on M-APOS to improve problem-solving ability of grade VII students of middle school / MTs
Authors: Yerizon  , Armiati  , Fadhilah L , Afifah Rusyda N
Published: March 2020

This study discusses the development of mathematical learning instructions based on the M-APOS theory. It aims to produce a mathematical learning instruction based on the M-APOS theory for students on grade VII of SMP / MTs of the second semester which is valid, practical, and improve students’ mathematical problem-solving abilities. The type of research is research and development which develops lesson plans and worksheets. The Plomp model was used in this study consisted the preliminary analysis phase, the prototype development stage, and the assessment stage. In the preliminary stage, a needs analysis, curriculum analysis, concept analysis and analysis of students is carried out. At the prototype development stage, a formative evaluation was carried out consisting of self-evaluation, one-to-one evaluation, expert review, small group evaluation, and field test. The subjects of this study were VII grade students of SMP Negeri 2 Pasaman. Based on the field test, learning instructions, the RPP and LKPD based on M-APOS mathematics for class VII SMP in the second semester, are valid, practical and effective. Valid is from aspects of content, presentation, language, and graphics. Practical is the in terms of implementation, time, ease of use. And effective is in terms of its potential impact on students’ mathematical problem-solving abilities.
Students’ obstacles in understanding the properties of the closed sets in terms of the APOS theory
Authors: Herawaty Dewi , Widada Wahyu , Handayani Sri , Berindo  , Febrianti Rina , Anggoro Abdurrobbil F D
Published: March 2020

An understanding of the concepts and principles of open sets can be done through activities in the form of mathematical actions, processes, objects organized in a scheme. This was the operationalization of the APOS theory (Action, Processes, Objects, and Schema). The purpose of this study was to describe students’ mistakes in understanding the properties of open sets in terms of the APOS Theory. This research was part of development research. It was the stage need assessment stage. We want to determine the characteristics of students to determine the right learning model. The subject of this study were 15 students of mathematics education at the University of Bengkulu. Students were selected based on the tasks that they do in learning Real Analysis. Data was collected from paper and pencil results and task-based interview results. Data were analyzed qualitatively using fixed comparison techniques. The results of this study were that students can only coordinate two or more sets, and the difficulty of proving a set theorem closes. One such theorem was “F was a subset of R, F closed sets if and only if F contains all the cluster points”. He can only take actions separately from the characteristics of the set given. The conclusion of this study was the difficulty of students in understanding the properties of the closed sets was the inability of students to carry out interiorization from actions to processes. Also, it was not able to encapsulate processes into objects. He was unable to reach the scheme of the properties of closed sets.
The thinking process of students in understanding the concept of graphs during ethnomathematics learning
Authors: Widada Wahyu , Herawaty Dewi , Andriyani Dwi S , Marantika Renti , Yanti I D , Falaq Dwi Anggoro Abdurrobbil
Published: March 2020

Understanding of concepts was one of the goals of learning graph theory. The concept of graph can be achieved through learning ethnomathematics. The purpose of this study was to describe students’ thinking processes in understanding the concept of graphs during ethnomathematics learning. This research was part of development research. This was the prototype stage. The subjects of this study were 26 students in the University of Bengkulu. The instrument of this study was the researchers themselves plus interview guides, anecdotes and observation sheets. Data collection was done during ethnomathematics learning. Data were analyzed qualitatively with the constant comparative technique. The results of this study were students begin learning with a culture of communication using mobile phones. Students think about the definition of graph by corresponding to a cellphone with a vertex. The edge of a graph was corresponded to the existence of a relationship between mobile phones. Students can define graph as a system that was built by a set of non-empty vertices, and a set of edges which were pairs of non-sequential vertices. The conclusion of this study was that students’ thought processes in understanding the concept of graph through ethnomatematics approaches. It was a contextual problem about the culture of communication using mobile phones.
Crochet crafts as a context using LSLC in number pattern
Authors: Andini  , Putri R I I
Published: March 2020

The research aims to produce a learning trajectory that can help students understand of number pattern learning by using the context of crochet crafts in 8th grade students. This research was conducted at SMP Negeri 1 Palembang. This research method using design research. The stages of the research carried out consisted of preparation for the experiment, design experiments, and retrospective analysis. Data collection is done through question answers, interviews, video recordings, and photos. In this study, learning was designed and developed based on alleged learning, PMRI, and LSLC. The results of this study indicate that learning pattern numbers using the context of crochet crafts can help students understand numerical patterns and find equations that can be used to find patterns of numbers to n.
Students’ metacognitive skills in solving word problem
Authors: Widodo Yulianto Florensius
Published: March 2020

Problem solving is the primary purpose of the mathematics curriculum. Metacognitive skills play an important role in problem solving. Solving mathematics word problem is a part of the problem solving. Students need appropriate steps and strategies to solve word problems and, in many cases, each student uses different strategy in solving word problem. This is because the difference of mathematical ability. This study aimed to describe the profile of metacognitive skills of students with high math ability and low math ability in solving the mathematics word problem, from the aspects of metacognitive skills of planning, monitoring and evaluating. The type of this research is qualitative descriptive. Subjects of the study are two students of Senior High School in Yogyakarta. Data collection techniques are observation, test, documentation and interviews. The validity of the data using a triangulation method. Data analysis techniques of this research are data reduction, data display, and conclusion/verification. The results of the study show that students who have high mathematical abilities meet the indicators of metacognitive skills in the planning, monitoring and evaluating stages. While students who have low mathematical abilities meet indicators of metacognitive skills in the planning stage but, have not fully met the indicators of metacognitive skills in the monitoring and evaluating stages in solving problems.
Gerpak Tuyul as the context in learning addition integer using LSLC system
Authors: Agustina A , Putri R I I
Published: March 2020

The researcher aims to produce a learning trajectory that can help students understand the operation of adding integers using the game gerpak tuyul. The sample of this study was students of class VIII of SMP Negeri 1 Palembang. The research method used is design research (design research). this study was designed through integer material learning using the context of the game of gerpak tuyul. Data collection is done through video recordings, photos and interviews. The stages of this study consisted of experimental preparation, design experiments and retrospective analysis. This research was only conducted in stage 1, namely preliminary preparation. The results of this study indicate that the resulting learning trajectory can help students more easily understand the concept of integer addition operations.
Studies of level visual thinking in geometry
Authors: Anwar  , Juandi D
Published: March 2020

Learning mathematics is how students get information that is built capable of solving a problem. One way of thinking someone is by visual thinking. Visual thinking has an important role in the success of mathematics learning, especially in solving mathematical problems that require high-level reasoning, one of them in solving the problems of abstract geometry. Although to help students develop their ability to think visually or visualize, first the teacher must pay attention to the level of visual thinking of students. This paper aims to determine the level of visual thinking in geometry. Based on the results of the literature review the authors built three levels of visual thinking in geometry, level 0: Non-visual (NV), level 1: local visual (LV) and level 2: Global Visual (GV).
Students of the extended abstract in proving Lobachevsky’s parallel lines theorem
Authors: Widada Wahyu , Herawaty Dewi , Jumri Rahmat , Wulandari Hayatri , Aliza Fenny , Anggoro Abdurrobbil F D
Published: March 2020

The highest quality of the students in proving the theorem was extended abstract. One of the theorems that was difficult to determine was Lobachevsky’s parallel lines. The purpose of this study was to describe the characteristics of extended abstract level students in proving the Lobachevsky parallel lines theorem. This was part of research development. This stage was the student analysis phase. The subjects of this study were 21 Mathematics Education Pre-service teachers who were taking Geometry courses. The instrument of this study was the researchers themselves with the help of task sheets and interview guides. Data was collected through task-based interviews. Qualitative data analysis techniques with fixed comparison techniques. The results of this study were that students were able to understand the axiom “through a point outside the line g, there were at least two lines parallel to g”. This axiom was used to prove the Nonmetrical Theorem. Also, students were able to prove that through point T which was not located at line g, there were not so many lines parallel to g. Students were able to compare the deductive structure of Lobachevsky’s Geometry with Euclid’s Geometry. The conclusion of this study was that extended abstract students were able to present several elements and pass interdependence between one another, so that it becomes an integrated entity. He can generalize to new structures.
Colonic Carcinoma Diagnosis using Chitosan Nanoparticles Based on the Optical Properties.
Authors: Abuelmakarem Hala S. , Hamdy Omnia , Sliem Mahmoud A. , El-Azab Jala , Om-Hashem M.A. , Ahmed Wafaa A.
Published: March 2020

Medical diagnosis using optical techniques and contrast agents is a promising method where it is safe and unexpansive technique. Every tissue can be distinguished by its optical absorption and scattering properties that are related to many physiological changes and it is a sign for cancerous cells. Characterizing the light propagation in the human tissues is a vital issue in early cancer diagnosis for more effective therapeutic. In this work, the glowing effect of chitosan nanoparticles has been observed. Also, the light propagation in each of colon cancer (Caco-2 cell line) and normal cells (WI-38 cell line) at 650 nm and 808 nm in the absence and in the presence of chitosan nanoparticles was studied to study its effect in differentiate the cancer cells from the normal cells. Chitosan nanoparticles were characterized by the dynamic light scattering and transmission electronic Microscope (TEM). A Monte-Carlo simulation model was applied to obtain spatially resolved steady state diffuse reflectance measurements for each of the examined cells. Furthermore, the optical fluence rate distribution at the tissue surface were used to reconstruct the image using the diffuse equation using the finite element method. Chitosan nanoparticles appeared its glowing effect. The proposed diffuse reflectance curves and fluence rate images show different features regarding for each of Caco-2 cell line and WI-38 cell line that promises to be effective in medical diagnosis.
Laser-Induced Synthesis of Pure Zinc Oxide Nanoflakes
Authors: Sabry Raghda , Fikry Mohamed , Ahmed Ola S , Zekri Abdel Rahman N , Zedan Abdallah F
Published: March 2020

Nanostructured zinc oxide (ZnO) has received immense attention as a low-cost and non-toxic photo-active material for different applications such as photocatalysis, photovoltaics, photonic and bio-medical fields. Herein, facile crystalline ZnO nanoflakes were prepared by homogeneous precipitation followed by laser-induced recrystallization and without the use of any organic ligand. The effect of laser type and wavelength on the recrystallization process was studied adopting a pulsed nitrogen laser (λ=337 nm) and a continuous argon laser (λ=488 nm). The pulsed nitrogen laser features a pulse duration of 150±1 ns, pulse energy of 1.3±0.3 mJ, and a target irradiance of 5.7±0.5 kW/cm2 while the continuous argon laser provides an irradiance of 10±0.3 mW/cm2. The morphology, structure and optical properties of the prepared nanostructures were studied using a scanning electron microscope (SEM), X-ray diffraction (XRD), UV-Visible, photoluminescence (PL), and Raman spectroscopy. The results confirm the formation of pure ZnO nanoflakes of the wurtzite structure. The laser-induced evolution of ZnO nanoflakes depends on the nature of the precipitating agent, laser energy and exposure time. The ZnO nanoflakes prepared using urea-assisted homogeneous precipitation is more advantageous than that precipitated with NaOH. Moreover, the pulsed nitrogen laser of higher irradiance demonstrated an enhanced formation of ZnO nanoflakes after 90 min of irradiation. The laser irradiation provides a facile synthetic route to pure ZnO nanostructures for various applications.
Raman spectroscopy of unknown mineral sample by solar pumped laser system
Authors: Abdel Hadi Yasser A , Ghazala M S Abo , Yousef Samir A , Rahoma U Ali , Elminawy Ahmed A
Published: March 2020

A detailed Raman spectroscopy study on an unknown sample by using compact solar-pumped (Nd:YAG) laser as an excitation source is simulated by using a primary parabolic concentrator mirror, Compound Parabolic Concentrator (CPC) to be used as an off-grid technique for identification unknown mineral samples. The unknown sample is exposed to the laser beam as the source of exciting photons at wavelength 532 nm. The frequencies of the scattered light are measured by using a highly sensitive spectrometer which detects in the range of (350 - 1150nm) with an optical resolution of 0.2 nm and 600 g/mm. The data are processed by an optical spectroscopy software to be compared with reference libraries. This study shows that the use of solar laser in the field of Raman spectroscopy is advantageous in increasing the precision of analyzing the materials and accordingly in reducing the costs of the analyzing process.
Exploration and Analysis of Container Architectural Adaptability Design in Central Jiangxi Province
Authors: Xiong Shenbing , Zhou Lintao , Wu Jiaqi , Tong Zhineng , Zhou Ming
Published: March 2020

Containers have always been used as materials in construction projects, and have the advantages of low carbon environmental protection, quick installation, convenient transportation, low construction price, and recyclable recycling. There is a potential for development in the field of sustainable buildings and fabricated buildings. Exploring the adaptability design of this modular unit can promote the industrialization of container construction. The purpose of this project is to make an in-depth discussion and study on the functional adaptability of container architecture in central Jiangxi Province province.
Discussion on Application of Energy Saving Technology in Green Building
Authors: Tong Zhineng
Published: March 2020

In the green building, in order to realize the sustainable development, it is necessary to use energy saving and environmental protection technology as far as possible in the design, construction and use of the building, reduce energy consumption, and realize the construction of the green building which is suitable for people to live. Green buildings run through the design, construction and use of the building, so we should consider the implementation and utilization of green buildings from the whole process.
Zigbee-based wireless gas monitoring sensor alarm system in coal mine
Authors: Jia Xuguang , Shi Fan , Guan Yongxing , Tang Shoufeng , Tong Minming
Published: March 2020

In view of the underground monitoring and monitoring system of coal mine, wired data transmission has been used in the past, but there are some disadvantages such as complicated wiring work, large amount of labor, fixed network structure which is not convenient to meet the dynamic requirements and low stability. Therefore, this study designs a monitoring system based on ZigBee wireless sensor network, wireless transmission, strong mobility, high reliability, low power consumption, strong real-time performance, etc, can be real-time monitoring of the coal mine environment parameters, including downhole temperature, humidity and gas concentration, and the acquisition of information sent by ZigBee wireless transmission way. STM32F103RBT6 is adopted as the wireless network processor in the system, which is responsible for establishing the network and transmitting data. NDIR HC sjh-5 CUBIC gas concentration sensor to collect underground mine data; Wireless SZOS embedded wireless communication module is used as the wireless sending and receiving port to enhance the wireless sending power. The software architecture adopts ZigBee protocol stack. The research shows that the proposed ZigBee wireless sensor network based coal mine underground gas monitoring system can help improve the real-time monitoring level and reduce safety risks in the complex and special environment of coal mine underground.
Experimental study on gas production optimization of pig manure and wheat straw under different pig manure levels
Authors: Chu Yajun , Liu Shengyong , Bai Hao , Zhang Shuqing , Peng Lei , Wei Dongdong , Lu Jie , Jie Libin , Pan Yibo
Published: March 2020

In order to explore the optimal ratio of pig manure and wheat straw mixed fermentation process, the experiment controlled the temperature of the fermentation control fermentation process to 35 °C, the total mass of the fermentation liquid was 700 g, and the total soild (TS) was 8%. The effect of pig manure content on fermentation. Based on the analysis of the gas production per unit of TS, when the pig manure content is 80%, the unit TS produced has the highest gas yield of 344 ml/g, which is 58.9% higher than that of pure wheat straw fermentation. Fermentation increased by 11.43%. In order to explore the best pig manure content in the fermentation process, regression analysis was performed on the gas production per unit of TS by origin. The result was that when the content of pig manure was 79%, the gas production was the highest, 336.3 ml/g, which was higher than that of wheat straw fermentation. 55.51%, 9.05% higher than pure pig manure fermentation. The methane content was used as the analysis result: when the pig manure content was 75%, the highest average methane content after start-up was 60.33%, which was 15.24% higher than that of wheat straw alone, and 3.4% higher than that of pig manure alone. Therefore, during the fermentation process of pig manure and wheat straw, when the content of pig manure is controlled at about 75%, the biogas production in the fermentation process and the methane content in the biogas can be effectively improved..
Analysis of Residential Space Structure Based on Housing Price in Lanzhou City
Authors: Li Mingtao , Guo Qianqian
Published: March 2020

Based on the residential POI (Point of Interest) data in the central district of Lanzhou, the spatial pattern of housing price were discussed using spatial auto correlation analysis. The results show that: the spatial variation of residence price in Lanzhou presented a point axle type pattern with the east-high and west-low feature. The spatial dependence and anisotropy were apparent in spatial variability of housing price, housing price in different directions have different degrees of spatial autocorrelation. Furthermore, with the increase of variation, the influence of structural components, such as traffic, environment and public service, were becoming more and more significant.
Establishment and analysis of damage calculation model under fuel air explosion effect
Authors: Zhang Xiaonan , Huang Qiang , Bai Xueyang , Liu Yexin , Gao Li , Sun Zhidan
Published: March 2020

Fuel air explosive has unique damage characteristics because of its different action mechanism. In this paper, through analyzing the damage mechanism and characteristics of fuel air explosive, the damage efficiency of fuel air explosive was quantitatively described by using overpressure and specific impulse. In combination with theoretical calculation and experimental fitting, the corresponding damage effectiveness calculation model of fuel air explosive was established. According to the actual application of fuel air explosive, the group of personnel was selected as the pseudomorphic target, the distribution area and relevant parameters of the target were set, so as to establish the corresponding damage criteria, which provided a reference for the effective evaluation of the damage efficiency of fuel air explosive.
Application Prospect of Coal-fired coupled Biomass in Technical Transformation of Thermal Power Unit
Authors: Chen Xiufang , Yan Hanbing , Guo Liqiang , Liu Fengchun
Published: March 2020

The development of thermal power units in China is restricted. In the process of transformation, coupled biomass power generation is the main direction of the transformation in the fuel sides. This paper introduces the constraints of thermal power units, the main ways of coal-fired coupling power generation, the technical route of coupling biomass in all of 84 pilot thermal power units and the problems faced by coupled biomass power generation. On this basis, some suggestions on the application of coal-fired coupling power generation in enterprises are put forward.
Analysis of Thermochemical Properties of three typical Manganese based thermite
Authors: Zhu Rui , Guo Tao , Yao Miao , Liu Xiaofeng , Wang Qiong , Ding Wen
Published: March 2020

In order to investigate the thermochemical and reactive properties of thermite composed of typical manganese oxides, three common manganese oxides meaning MnO2, Mn2O3 and Mn3O4, are selected in this paper to form aluminothermic agent with Al powder, respectively. According to the chemical thermodynamics, the difference of Gibbs free energy among different components is calculated, and the reaction rate k is calculated according to Eyring equation, then the Gibbs free energy values of three thermite at different ambient temperatures are drawn. Furthermore, according to the theory of chemical reaction calorific value calculation, the reaction calorific values of three thermite at different temperatures are calculated. The results show that the Gibbs free energy of Al/MnO2 system is the smallest at different temperatures, the reaction rate and the enthalpy of reaction of Al/MnO2 are the fastest and the smallest at different temperatures and the heat release is the largest. The results of calculation provide theoretical guidance for experimental design and practice. Under the condition of the same mass of reactants, the discharge heat of MnO2 is the largest, and the heat value of the MnO2 is the highest.
Construction of BIM collaborative management platform for the owner in China
Authors: Dong Na , Huang Qiuyuan , Xiong Feng
Published: March 2020

With the rapid development of information technology, BIM application of all parties in engineering construction is becoming more and more mature. The construction of BIM collaborative platform is the key to information sharing and collaborative work of all parties. Based on the decomposition of the owner’s life cycle project management tasks of China, this paper carries out detailed functional requirements and information needs analysis, and proposes the functional design, basic architecture and information flow of the owner’s BIM collaborative platform, which can provide reference for the construction, selection and application of the owner’s BIM collaborative management platform.
Gas Sensing Properties of 3D Graphene Nanotubes (GNT)@ZnO at Room Temperature
Authors: Dong Lei , Wang Yanyan , Wu Zhekun , Liu Weixiao , Ying Shuyang , Huang Manman , Peng Changsi
Published: March 2020

In this study, nickel nanowires (Ni-NWs) were first grown by chemical method and then graphene was grown on the as-obtained Ni-NWs by CVD route to yield graphene nanotubes (GNTs). The GNTs were then hydrothermally combined with ZnO to construct a gas sensor for detection of NO2. The as-prepared GNT@ZnO sensor displayed high sensitivity towards the detection of NO2 reaching up to 47.5% per 50 ppm NO2. In addition, the sensor exhibited relatively fast response time of 300 s and recovery time of around 200 s under UV light. The sensor also showed good repeatability, making it promising for future applications.
Regional Energy Internet Construction Framework and Key Tasks
Authors: Li Nan , Zheng Kuan
Published: March 2020

Based on the strategic needs of the State Grid Corporation of China in building regional energy Internet, this paper carries out study from the following points: first, analyzing the connotation and characteristics of regional energy Internet; second, building the “three systems” structure of regional energy Interest construction; last, defining the key tasks of regional energy Internet construction from three aspects: infrastructure, technological innovation and market mechanism.
Study on Experimental of Waste Cathode Ray Tube Glass Fine Aggregate in Barite Concrete
Authors: Shi Jianjun , Wang Can , Zhang Zhiheng , Liu Hualiang , Yang Xiaofeng , Ling Yan , Li Qi , Zhang Zhijun
Published: March 2020

In order to study the waste cathode ray tube glass fine aggregate (particle size < 0.15 mm) on barite concreteperformance, the waste cathode ray tube glass fine aggregate is blended into the barite concrete at 0%, 4%, 6%, 8%, and 10% of the mass of the barite sand quality to conduct experimental research on the related properties of barite concrete. The experimental results show that when the amount of waste cathode ray tube glass fine aggregate is 6%∼8%, the prepared barite concrete has the best working performance. The slump expansion reaches 560mm×560mm, and the 28d cube compressive strength is 37.76MPa. The V-box passage time is 17.56s, and barite concrete has the best shielding gamma ray capability.
An Empirical Study on the Influence of Social Capital Control on China’s Energy PPP Project Investment
Authors: Yang Weihua , Li Ling , Fan Feige , Wang Xiushan
Published: March 2020

In order to effectively attract the participation of social capital parties and solve the shortage of project funds, it is necessary to actively explore the factors affecting the investment of energy PPP projects. Based on the data of China Energy PPP project of World Bank from 1995 to 2018, an empirical study was conducted to explore the impact of social capital control rights on energy PPP project investment. The empirical results show that the higher the social capital control right in China’s energy PPP project, the greater the investment in PPP projects; the longer the energy PPP project contract period, the less PPP project investment. The research provides a reference for social capital to participate in the energy PPP project investment decision. It is also recommended that government departments can decentralize management when implementing energy PPP projects in order to better attract investment.