bluuebunny/crossref_metadata_2025_split huggingface dataset:
New Antibiotics for Hospital-Acquired Pneumonia and Ventilator-Associated Pneumonia
Authors: Bassetti Matteo , Mularoni Alessandra , Giacobbe Daniele Roberto , Castaldo Nadia , Vena Antonio 
Published: January 2022

AbstractHospital-acquired pneumonia (HAP) and ventilator-associated pneumonia (VAP) represent one of the most common hospital-acquired infections, carrying a significant morbidity and risk of mortality. Increasing antibiotic resistance among the common bacterial pathogens associated with HAP and VAP, especially Enterobacterales and nonfermenting gram-negative bacteria, has made the choice of empiric treatment of these infections increasingly challenging. Moreover, failure of initial empiric therapy to cover the causative agents associated with HAP and VAP has been associated with worse clinical outcomes. This review provides an overview of antibiotics newly approved or in development for the treatment of HAP and VAP. The approved antibiotics include ceftobiprole, ceftolozane–tazobactam, ceftazidime–avibactam, meropenem–vaborbactam, imipenem–relebactam, and cefiderocol. Their major advantages include their high activity against multidrug-resistant gram-negative pathogens.
In vitro transmission of Chlamydia using naturally infected koala (Phascolarctos cinereus) semen
Authors: Hulse Lyndal , Beagley Kenneth W. , Larkin Rebecca , Johnston Stephen D. 
Published: January 2022

Transmission of Chlamydia pecorum infection has generally been assumed to be via the urogenital route and in an attempt to confirm this we investigated an in vitro method of Chlamydia infection using naturally infected koala semen to inoculate a cell line and attempt to estimate C. pecorum infectious load. A total of 57% of 122 koala semen samples had low C. pecorum copy number or no burden, while 18% of semen samples contained >10 000 inclusion-forming units/mL, as determined by quantitative polymerase chain reaction. In vitro inoculation of a McCoy cell line resulted in successful infection from 4% of semen samples where C. pecorum burden was >105 inclusion-forming units/mL. Our preliminary study suggests that transmission of C. pecorum infectious dose may be restricted to peak bacterial shedding in semen associated with recent infection. Here, we report venereal transmission of C. pecorum in koala semen is possible; however, we speculate that antimicrobial factors and innate immune function receptors associated with semen may inhibit chlamydial growth. These mechanisms have yet to be reported in marsupial semen.
Landmarks in the development of human communication
Authors: Ruoppolo Giovanni , Nicastri Maria 
Published: January 2022

Objective:
Describing the evolution of human communication from its origins to our days in order to provide insights useful to guide reflexions on the modern physiopathology of communication research.

Methods:
A series of scientific articles and texts concerning the evolution of human communication and the relationship between human communication and culture has been revised.

Results:
The capacity of man to mediate symbolic representations through language has led to a revolutionary transformation from “obliged” communication, already present in nature, in a “biological independent” communication, with the opportunity of creating culture, up to the point of granting control and manipulation of biological processes. Human communication, supported in modern times by the increasingly widespread channels of diffusion, has progressively become itself an object of scientific studies, able to influence the choices of recipients considered to be passive.

Conclusion:
Traditional landmarks in human communication have been language acquisition, writing, reading and studies on rhetoric. At present times communication is further influenced by mass media, and new frontiers are opening, including teleconsultations, instant translations, humanoid robots naturally interacting with humans and brain computer interface: will it be the last landmark in the development of human communication?
What are the dynamics of hydrometeorological parameters on peatlands during the 2019 extreme dry season?
Authors: Irfan M , Safrina E , Koriyanti E , Saleh K , Kurniawaty N , Iskandar I 
Published: January 2022

Abstract
Peatlands in Indonesia are generally flammable, including peatlands in Kalimantan. The Indonesian government has made efforts to prevent fires on peatlands in Indonesia. One of them is by establishing several stations for measuring hydrometeorological parameters which are managed by the Peat Restoration Agency (BRG). This study utilizes BRG data, especially rainfall and groundwater levels, combined with hotspots data from MODIS satellite measurements during the 2019 extreme dry season at two research locations, namely at BRG stations in Central Kalimantan and West Kalimantan. The objectives of this research is to study the dynamics of these three parameters and find their relationship during the 2019 extreme dry season. To achieve the objectives of this study, an analysis of the time series graphs of these three parameters was carried out during the 2019 extreme dry season. It is hoped that the results of this research will help to prevent severe fires on peatlands, especially in Kalimantan. The results of this study indicate that during this period there was a decrease in rainfall, a decrease in groundwater level, and the emergence of a large number of hotspots. It can be concluded that the hotspots that appear are closely related to the low groundwater level due to low rainfall.
Synthesis of BaFe12-xCrxMnxO19 material based on Telindung beach iron sand using coprecipitation method
Authors: Fatari H A , Doyan A , Makhrus M , Susilawati  , Taryana Y 
Published: January 2022

Abstract
The production of BaFe12-xCrxMnxO19 material has been carried out based on iron sand at Telindung Beach, East Lombok Regency, using the coprecipitation method. The manufacture of BaFe12-xCrxMnxO19 material has three stages: the separation stage, the magnetic material separation stage, and the synthesis stage. The separation stage aims to separate the material from non-magnetic materials to obtain the maximum total Fe content. The results obtained are 43.50 grams of magnetic material from 50 grams of natural sand using a permanent magnet. The next stage is separating the magnetic materialused as the basic ingredients in the synthesis of BaFe12-xCrxMnxO19. The fundamentalcomponents used in the synthesis process were BaCO3, Fe3O4 obtained from the separation, MnCl2 and CrO3 as doping, NH4OH as a precipitate, and 37% HCl as a solvent. The dissolution process was carried out using a hot plate magnetic stirrer for 30 minutes at 80°C. Synthesis Barium M-Hexaferrite based on natural iron sand by using doping ion variations x= 0.0; 0.4; 0.8; 1.0 and calcination temperature of 200 °C, 600 °C and 1000 °C. The synthesis results made the colour change of BaFe12-xCrxMnxO19 powder darker. This happens because the higher the mole fraction of doping used, the darker the powder obtained. Moreover, the darker colour of the powder indicates that the solvent has evaporated due to the calcination process.
Exploring pre-service teacher’ views of science process skills
Authors: Nursalam L O , Syarifuddin  , Sailan Z , Saifullah  , Hakim A R , Rosadi A , Suhardi M , Asyş_ari M , Prayogi S , Bilad M R 
Published: January 2022

Abstract
The school curriculum in Indonesia requires students to master science comprehensively through problem-based learning with the integration of science process skills (SPS) or scientific methods. This study aims to identify the responses of pre-service teacher students about the importance of SPS components. The data collection was done via a survey with samples of 120 pre-service teachers. The response of pre-service teacher to SPS was collected using 14 items in the questionnaire. The responses were analyzed qualitatively and statistically to find out the frequency of the strongest responses towards the SPS components. The results showed that pre-service teachers stated that problem-solving/critical thinking skills (63 voters), basic understanding answers (59 voters), hypotheses (41 voters), and making conclusions (39 voters) were key components in SPS. Based on these findings, the application of learning that can improve the science process skills of pre-service teachers is important to do.
Effect of additional magnetic material Ni on structure and magnetic properties Eu2-xCexCu0.99Ni0.01O4+α-δ
Authors: Rochman L P , Anggia H D , Pratama R , Maulana T , Winarsih S , Maryati Y , Syakuur M A , Widyaiswari U , Sari D P , Saragi T , Risdiana  
Published: January 2022

Abstract
Superconductors are materials with the unique characteristics when the temperature of the material is below its critical temperature, namely zero resistivity. There are many superconducting phenomena that need to be explained theoretically. One of them is the effect of addition of impurities on the physical properties of superconducting materials. In this study, the addition of 0.01 Ni magnetic impurities in the Eu2-xCexCuO4+α-δ material has been carried out to form the structure Eu2-xCexCu0.99Ni0.01O4+α-δ, in an under-doped area with a concentration of Ce (x) = 0.09 and 0.10. Material synthesis was carried out by the solid reaction method with prefire at 900 °C for 20 hours, sintering at 1,000 °C for 16 hours, and annealing at 900 °C for 10 hours by flowing argon (Ar) gas. The XRD measurements were carried out to investigate the crystal structure, while the magnetic properties were carried out by SQUID measurement at temperature of 2 K to 30 K. From the XRD measurements, it was found that the crystals formed had a tetragonal crystal structure T’ which was indicated by the appearance of two main peaks with Miller indices (103) and (110), lattice parameter a is 3,904 Å in both samples, lattice c is 11.8752 Å and 11.9738 Å for the concentrations of Ce (x) = 0.09 and 0.10. The volume of unit cells obtained were 181.0178 Å3 and 181.0244 Å3 with the bond distance between Cu-O of 1.9521 Å and 1.9523 Å. It was also obtained that the crystal size were 86.2604 nm and 91.6735 nm. From the SQUID measurement, it was found that the material Eu2-xCexCu0.99Ni0.01O4+α-δ has paramagnetic properties. The value of the effective magnetic moment was decreased by reducing the addition of Ni impurities of 0.0057 and 0.0051.
Preparation and characterization of Bentonite-OPBA nanocomposite as filler
Authors: Frida E , Bukit N , Bukit F R A , Bukit B F 
Published: January 2022

Abstract
Bentonite-OPBA nanocomposite has been made. The preparation of OPBA and bentonite was carried out by calcination process at a temperature of 700oC for bentonite and 500 °C for OPBA and a ball mill process for 10 hours and coprecipitation method with a solution 6 M HCl. Then nano bentonite was synthesized with surfactant Cetyl Trimethyl Ammonium Bromide (CTAB). The XRD analysis obtained a Bentonite-OPBA particle size of 14.46 nm, with a Tetragonal crystal system and density of 3.01200 g/cm3. XRF analysis obtained SiO2 content of 55.1 % FTIR analysis obtained absorption band detected at 981.33 cm−1 indicates that the increase in silica strengthening has in the polymerization process.
Study of crystal structure and magnetic properties of Eu
2-x+0.01Ce
x-0.01Cu0.99Fe0.01O4+α-δ
Authors: Anggia H D , Rochman L P , Pratama R , Maulana T , Winarsih S , Maryati Y , Syakuur M A , Widyaswari U , Sari D P , Saragi T , Risdiana  
Published: January 2022

Abstract
Superconductor is material which has ability to perform zero resistivity in certain temperature. There are some phenomena in superconductor that still cannot be describe well. One of the phenomena is the effect of impurities to the physical properties of superconductor. In this research, the partially substitution of magnetic impurity Fe for Cu in electron-doped superconducting cuprates of Eu2-x+0.01Ce
x-0.01Cu0.99Fe0.01O4+α-δ in over doped regime x = 0.16 and 0.20 with 1% of Fe content was prepared by solid state method in order to investigate the structure and magnetic properties of ECCFO. The results of the characterization on crystal structure using XRD show that the material has a tetragonal T’ crystal structure which is indicated by the appearance of two main peaks with miller index (103) and (110). Magnetic-susceptibility measurements were carried out at low temperatures from 10 to 30 K. The values of curie constant, magnetic moment per unit volume and effective magnetic moment decreased with increasing of Cerium concentrations.
Development of ethnoscience module on pond ecosystem, in Serawai Tribe, Seluma Regency
Authors: Kusumah R G T , Andaria M , Misriani A , Purdiyanto  , Samsilayurni  
Published: January 2022

Abstract
This study aims to develop an ethnoscience module as a teaching material for pond ecosystems in science learning at Public Elementary School 36 Seluma Regency. The Research and Development (R & D) method is used in this study. The stages are potential and problem, data collection, product design, design validation, design revision, trial, product revision, usage trial, product revision, mass production. The information came from the village of Tanah Abang, the Serawai tribe and Public Elementary School 36 Seluma. The results showed that the final product in the form of an ethnoscience-based science module with an Artificial Ecosystem in the pond was suitable for use. This feasibility refers to the National Education Standards Agency (BSNP) in the category of having passed stage I and stage II by obtaining an average design feasibility score of 87%, material feasibility 86%, and presentation feasibility 83%. Thus obtained an average feasibility of 85%.
Synthesis of low viscosity of polymethylhydrosiloxane using monomer of dichloromethylsilane
Authors: Arini V F , Fauziah U , Auliya D G , Setiadji S , Fitrilawati  , Risdiana  
Published: January 2022

AbstractPolydimethylsiloxane (PDMS) is a vitreous humour substitutes in vitreoretinal surgery to treat retinal detachment. PDMS was synthesized from the monomer octamethylcyclotetrasiloxane (D4). However, D4 is difficult to obtain in Indonesia. So, we need an alternative to replace PDMS. One type of siloxane polymer that can be a potential substitute as PDMS is polymethylhydrosiloxane (PMHS). In this study, PMHS was obtained from the hydrolysis-condensation process of dichloromethylsilane (DCHS). The hydrolysis process produces monomer that is ready for the condensation process to produce PMHS. Monomer and polymer samples were characterized to determine viscosity, surface tension, refractive index, and functional groups. The monomer sample has a viscosity in the range of 28.7-36.4 mPa.s. The surface tension and refractive index are in the range of 17-18 mN/m and 1.3954-1.3958. The polymer sample has a viscosity of 560-1130 mPa.s with a surface tension of 19 mN/m and a refractive index in the range of 1.3966-1.3970. From the FTIR measurements, all major functional groups in both monomers and polymers of PDMS were observed with the addition of Si-H functional groups which characterize PMHS. These results indicate that PMHS with low viscosity has been successfully obtained by hydrolysis- condensation method of DCHS.
Concept understanding of students through core physics learning tools based on guided inquiry assisted by PhET virtual media
Authors: Susilawati  , Doyan A , Wahyudi  , Ayub S , Ardhuha J 
Published: January 2022

Abstract
This research is a development research that aims to test the effectiveness of the inquiry model-based core physics learning device with the help of PhET virtual media in improving students’ conceptual understanding. The device was developed using a 4D model which includes define, design, develop and disseminate. The sample of this study was all undergraduate students who took core physics courses which consisted of two classes, namely class A (experimental class) and class B (control class) which amounted to 50 people. The results of the pre-test and post-test were analyzed using the t-test at a significance level of 5%, while the increase in understanding of the concept used the N-gaint test. The results of the t- test show that the t-count value is greater than the t-table. This means that core physics learning tools using an inquiry model with the help of PhET virtual media affect students’ understanding of concepts. Analysis of increasing understanding of the concept of d using the N-gain test. The N-gain analysis shows that students’ understanding of concepts has increased the use of these devices in the high category. This means that students’ understanding of concepts is effectively improved using an inquiry model with the help of PhET virtual media.
How do additional instructions change the answer? Study of pre-service physics teachers’ misconception about buoyancy
Authors: Maison  , Asma R , Doyan A , Saputri L 
Published: January 2022

Abstract
The misconceptions experienced by pre-service physics teachers are essential to know; However, these are not easy to identify, let alone to remediate. This study aims to find out how additional instruction changes pre-service physics teachers’ responses and whether or not it affects the misconceptions of pre-service physics teachers. Respondents were tested using the online Four-Tier Buoyancy Instrument (FTBI) twice, namely at Time 1 and 2. Preservice physics teachers were given additional instructions between the two measurements by reminding them of the principle of balance on a stationary object or an object moving in a straight line with constant velocity. Quantitative data from the two areas of the instrument are then analyzed and compared to determine the differences in respondents’ answers. In-depth interviews were conducted with respondents who had different answers to the instruments. The results showed that a small proportion of respondents had changed their answers to be the correct answers on several FTBI items. The interview results showed that it seems there was a tendency to change the respondents’ cognitive structure from locally coherent to global coherent. However, this change does not necessarily reduce pre-service physics teachers’ misconceptions about buoyancy significantly.
Optical Simulations on the Surface Plasmon Polaritons Loss & Power Dissipation in Organic Light Emitting Diodes
Authors: Chen Guorui , Duan Jian , Liu Shuai , Yue Guiwen , Qian Min 
Published: January 2022

Abstract
An optical energy loss mechanism including the surface plasmon polaritons (SPPs) loss in organic light-emitting diodes (OLEDs) is introduced based on CPS theory. The theoretical calculations of power dissipation spectrum (PDS), power dissipation map (PDM) and the out-coupling efficiency (OCE) of OLEDs are proposed. MATLAB tools are applied to simulate the optical model and shows that a considerable proportion of SPP loss leads to the low EQE of the OLEDs especially when the distance from the light-emitting boundary to cathode is short, it can even account for up to 40% of the total energy. Wave guide (WG) loss and SPPs loss go aganist vs. distance from the light-emitting boundary to cathode, and there exists a optimized distance of OCE. Study of SPPs losses and power dissipation mechanism provides the theoretical basis to enhance OLED light-emitting efficiency. The OCE calculation results are <20%.
Analysis of Regularized Poisson GLM Spike-Train Modeling
Authors: Fan Yile , Li Yuanpeng , Xue Naiyang , Ding Dan 
Published: January 2022

Abstract
This paper introduces a method for modeling and analyzing neural impulse sequences. In this paper, we define the response value of a scale-independent neuron and construct the correlation graph of the neuron under the response value. The minimum cut algorithm is applied continuously to obtain the maximum group of neurons. According to the characteristics of the firing of neurons, a Poisson-process based model is proposed to mathematically model the neural coding, and the gradient descent method is used to optimize it. Through the modeling analysis method, information such as maximum neuron group and Inter-spike-Interval (ISI) can be effectively analyzed according to neuron impulse sequence.
Strong γc - γcl H∞
Stabilization for Networked Control System Based on Lyapunov Function and DoS Attacks
Authors: Zheng Ying , Zhou Ying 
Published: January 2022

Abstract
This paper is concerned with the strong γc - γcl H∞
stabilization for networked control system under DoS attacks with limited communication bandwidths. The quantizer is employed to the network transmission channel from sensor-to-controller in order to reduce the unnecessary data transmissions. In the network environment, it is assumed that there exist DoS attacks in the transmission channel from controller-to-actuator. By describing DoS attacks as the probability models subject to the Bernoulli distribution, the network control system is modeled as the system with random parameters. With this model, a dynamic output feedback controller is designed, which satisfies the given H∞ bound norm γc
. Under the action of the controller, the closed-loop system is exponential stable in the mean-square sense and satisfies H∞ bound norm γcl
. Especially, a Lyapunov function based on quantization error and attack probability is proposed in the stability analysis. Finally, the effectiveness of the proposed method is verified by a simulation example.
Detection of Auxiliary Equipment in Engine Room Based on Improved SSD
Authors: Qi Jiahao , Zhang Jundong , Meng Qingyan , Ju Jiaming , Jiang Haotian 
Published: January 2022

Abstract
To improve the intelligent operation and maintenance of ships, the research on the perception of engine room auxiliary equipment (A/E) will realize AUTO-0 and replace the engineers. Due to compact layout of the cabin and the different shapes of equipment, the Single Shot MultiBox Detector (SSD) that uses the traditional convolution method for feature extraction cannot adapt to the complex environment. Therefore, an improved A/E detection algorithm based on SSD is proposed. Firstly, we collected the images of actual ships, annotated them manually, and used the K-Means clustering algorithm to analyze them. Secondly, we replaced the classification loss of SSD with the focal loss, balancing the positive and negative samples in the dataset. Finally, we added repulsion loss for the overlapping targets to improve the detection effect of the model against dense occlusion & overlap. The experiment is based on the dataset containing 18185 training object boxes, and 2044 test object boxes, the mean average precision (mAP) in this paper reaches 78.95%, which is 5.63% higher than the original SSD, and the detection boxes are more suitable.
The Application of Reprogramming Technology in a Wireless Sensor Network
Authors: Huang Jianjun 
Published: January 2022

Abstract
Wireless sensor networks can collect physical world information in a large, long-term and real-time manner in a complex environment. Wireless sensor networks have been successfully applied in many fields. With the development of wireless sensor network, wireless sensor network applications need to update the executable code on the sensor due to the change of application requirements. The researchers call this a wireless sensor network application reprogramming, or simply reprogramming. The efficiency of reprogramming is closely related to the size of the updated code that needs to be distributed and the amount of traffic to be distributed. This paper firstly expands the classical logic language based on the characteristics of wireless sensor network, and implements the language by compiling/interpretation, which can generate the smaller update code. Secondly, the paper also makes full use of the location information of the sensor and the data distribution protocol of low message complexity of telecommunication and channel resources. The research results of this paper can effectively reduce the communication volume of the distribution process.