bluuebunny/crossref_metadata_2025 huggingface dataset:
Synthesis of triphenylpyridines via an oxidative cyclization reaction using Sr-doped LaCoO3 perovskite as a recyclable heterogeneous catalyst
Authors: Le Thu N. M. , Doan Son H. , Pham Phuc H. , Trinh Khang H. , Huynh Tien V. , Tran Tien T. T. , Le Minh-Vien , Nguyen Tung T. , Phan Nam T. S.
Published: August 2019

An La0.6Sr0.4CoO3 strontium-doped lanthanum cobaltite perovskite was prepared via a gelation and calcination approach and used as a heterogeneous catalyst for the synthesis of triphenylpyridines via the cyclization reaction between ketoximes and phenylacetic acids.
Hierarchical multicarbonyl polyimide architectures as promising anode active materials for high-performance lithium/sodium ion batteries
Authors: Li Jun , Luo Mo , Ba Zhaohu , Wang Zhenxing , Chen Lijuan , Li Yingzhi , Li Mengmeng , Li Hai-Bei , Dong Jie , Zhao Xin , Zhang Qinghua
Published: August 2019

A hierarchical multicarbonyl polyimide derivative bearing various carbonyl groups and benzene rings with spherulite-like architectures was synthesized, which demonstrates great potentials as anode material for high-performance LIBs/SIBs.
Simple fabrication of a highly conductive and passivated PEDOT:PSS film via cryo-controlled quasi-congealing spin-coating for flexible perovskite solar cells
Authors: Chen Wei-Hsiang , Qiu Linlin , Zhang Pengyun , Jiang Pei-Cheng , Du Pingfan , Song Lixin , Xiong Jie , Ko Frank
Published: August 2019

Cryo-controlled quasi-congealing spin-coating for PEDOT:PSS was firstly performed to enhance the film quality, improving the photovoltaic performance of PSCs.
Design, synthesis and amplified spontaneous emission of 1,2,5-benzothiadiazole derivatives
Authors: Martín Raúl , Prieto Pilar , Carrillo José R. , Rodríguez Ana M. , de Cozar Abel , Boj Pedro G. , Díaz-García María A. , Ramírez Manuel G.
Published: August 2019

The design, synthesis and evaluation of the amplified spontaneous emission (ASE) properties of a series of arylalkynyl-benzo[c][1,2,5]thiadiazole (BTD) and [1,2,5]thiadiazolo[3,4-g]quinoxaline (TDQ) derivatives are described.
LncRNA SRA1 is down-regulated in HPV-negative cervical squamous cell carcinoma and regulates cancer cell behaviors
Authors: Liu Yunyong , Li Mengdan , Yu Huihui , Piao Haozhe
Published: August 2019

LncRNA SRA1 plays important roles in several types of human diseases. The present study aimed to explore the role of SRA1 in cervical squamous cell carcinoma (CSCC). In the present study, we showed that plasma SRA1 was down-regulated in human papillomavirus (HPV)-negative CSCC patients but not in HPV-positive CSCC patients compared with healthy females. Down-regulated SRA1 distinguished HPV-negative CSCC patients from HPV-positive CSCC patients and healthy females. In HPV-negative CSCC patients, miR-9 was up-regulated and inversely correlated with SRA1. In HPV-negative CSCC cells, SRA1 overexpression caused the down-regulated miR-9, while miR-9 overexpression failed to affect SRA1. Moreover, SRA1 overexpression caused decreased, while miR-9 overexpression caused increased proliferation, migration and invasion rates of cancer cells. In addition, miR-9 overexpression attenuated the effects of SRA1 overexpression. Therefore, SRA1 is down-regulated in HPV-negative CSCC and regulates cancer cell behaviors possibly by down-regulating miR-9.
Porcine antiviral activity is increased by CRISPRa-SAM system
Authors: Jiang Jinhe , Sun Yumei , Xiao Rong , Wai Kai , Ahmad Muhammad Jamil , Khan Faheem Ahmed , Zhou Hongbo , Li Zhiyong , Zhang Yong , Zhou Ao , Zhang Shujun
Published: August 2019

Clustered Regularly Interspaced Short Palindromic Repeat activation-synergistic activation mediator system (CRISPRa-SAM) has been efficiently used to up-regulate the targeted genes in human and mouse. But it is not known whether the CRISPRa-SAM system can be used against porcine disease because its two important transcriptional activation domains (P65 and heat shock transcription factor 1 (HSF1)) are from mouse and human, respectively. Pig is one of the most important meat sources, porcine viral infectious diseases cause massive economic losses to the swine industry and threaten the public health. We aimed to investigate whether the CRISPRa-SAM system could increase porcine antiviral activity by mediating two pig-specific target genes (Mx2 and β1,4 N-acetylgalactosaminyltransferase (B4galnt2)). First, we constructed PK-15 and IPEC-J2 cell lines expressing nuclease-deficient Cas9 (dCas9)-vp64 and MS2-P65-HSF1 stably. Next, in these two cell models, we activated Mx2 and B4galnt2 expression through CRISPRa-SAM system. Antiviral activity to PRV or H9N2 was improved in PK-15 cells where Mx2 or B4galnt2 was activated. Altogether, our results demonstrated the potential of CRISPRa-SAM system as a powerful tool for activating pig genes and improving porcine antiviral activity.
Multi‐layer broadband asymmetric transmission of linearly polarised in active metasurface
Authors: Li You , Liu Xiaochun , Liu Lili , Cao Qunsheng
Published: August 2019

Although many different kinds of polarisers have been extensively studied in the last 20 years, most previous designs were passive and single‐functional designs. In this study, a kind of a new active polarisation converter is designed. The active polarisation converter is comprised of periodically arranged circular ring embedded with PIN diodes. Four different results of polarisation transformation and reflection can be presented by controlling the bias voltage of the PIN diodes. The full‐wave simulation results show that the proposed metasurface can rigorously satisfy the asymmetric transmission and can achieve cross‐polarisation conversion with high efficiencies for linearly polarised waves. In addition, there is another particularly obvious advantage of the proposed structure is its broad operation bandwidth in microwave band, the bandwidth of the polariser reaches 70%, more than 90% cross‐polarisation conversion efficiency is observed from 6.5 to 13.5 GHz.
New moving target Doppler centroid expression in geosynchronous SAR
Authors: Melzi Mounir , Hu Cheng , Dong Xichao , Cui Chang
Published: August 2019

Various techniques have been proposed in the literature to tackle the problem of moving target detection in the low‐earth orbit synthetic aperture radar (LEO SAR) scenarios. Nevertheless, this issue has not been addressed yet in the geosynchronous synthetic aperture radar (GEO SAR) situation. This study points out the existing differences in the Doppler domain between GEO and LEO SAR imaging, and shows the advantages of using Doppler spectrum based‐techniques to solve the multiple ground moving target indication issue in GEO SAR. Furthermore, it provides a new formulation for the moving target Doppler centroid in the GEO SAR case that consider the specific features of the GEO SAR imaging. Simulation results are provided to demonstrate the accuracy of the developed expression.
Contribution of CAD to the Sensitivity for Detecting Lung Metastases on Thin-Section CT – A Prospective Study with Surgical and Histopathological Correlation
Authors: Meybaum Christian , Graff Mareike , Fallenberg Eva Maria , Leschber Gunda , Wormanns Dag
Published: August 2019

Purpose To assess the sensitivity of radiologists and a CAD system for the detection of lung metastases on thin-section computed tomographic (CT) scans prior to pulmonary metastasectomy.

Materials and Methods All patients scheduled for resection of lung metastases were eligible for this prospective single-center trial. 95 patients with 115 surgical procedures (pulmonary metastasectomy using thoracotomy) were included. An experienced radiologist examined the CT scans for pulmonary metastases and documented his findings. A commercial CAD system was used as a second reader; additional CAD findings were recorded. A comparison of the sensitivity of the radiologist alone and with CAD was performed. Intraoperatively surgeons tried to identify the documented lesions and resected them as well as additionally palpable lesions. The standard of reference consisted of surgery and histopathology. Follow-up information for radiologically detected lesions missed during surgery was sought.

Results 693 lesions (262 metastases) were detected radiologically or surgically, 646 of them were resected. The sensitivity of radiologists without CAD was 67.5 % for all lesions (87.4 % for metastases). CAD highly significantly (p < 0.001) increased the sensitivity to 77.9 % (92.7 %). During surgery, 143 additional lesions (19 metastases) were detected. 49 radiologically detected lesions were not palpable during surgery: 4 metastases, 5 benign lesions, and 40 lesions of an unknown nature.

Conclusion CAD provides significant additional sensitivity for detecting lung metastases using MDCT compared to the performance of a radiologist alone. CT reveals a relevant number of non-palpable pulmonary lesions.

Key Points: 

Citation Format
Quality of Warfarin Therapy and Quality of Life are Improved by Self-Management for Two Years
Authors: Sølvik Una Ørvim , Løkkebø Elisabeth , Kristoffersen Ann Helen , Brodin Ellen , Averina Maria , Sandberg Sverre
Published: August 2019

Background Studies from several countries show that self-management of vitamin K antagonist (e.g., warfarin) therapy reduce the risk of complications compared with conventional management.

Objectives The aim of this study was to investigate the quality of warfarin management when patients were transferred from conventional management to self-management in Norway. In addition, quality of life (QoL) before and after 2 years of warfarin self-management was investigated.

Materials and Methods The study was longitudinal with a retrospective and prospective design where 126 patients on conventional management of long-term warfarin therapy underwent a 21-week training program of warfarin self-management followed by 2 years of self-management. The outcomes of the study were time in therapeutic range (TTR), the variance of international normalized ratio (INR) values, extreme INR values (INR ≤ 1.5 and ≥ 5), complications, and QoL, comparing the 2-year period of the conventional management with the 2-year period with the self-management.

Results The median TTR was higher during self-management compared with conventional management (78.1% vs. 65.9%, respectively, p < 0.001). In addition, self-management resulted in lower INR variance (0.22 vs. 0.33, p < 0.001), reduced percentage of extreme INR values (1.8% vs. 5.3%, p < 0.001), less complications (0% vs. 5.6%), and improved QoL (p < 0.001) compared with conventional management.

Conclusion We used five different measures and found improved quality of warfarin self-management 2 years after patients were transferred from the conventional management.
Excitation and depression of coherent state of the simple harmonic oscillator
Authors: Dehghani A. , Mojaveri B. , Alenabi A. A.
Published: August 2019

Othman and Yevick [Int. J. Theor. Phys. 57, 2293 (2018)] introduced a new class of states defined as “near” coherent states attached to the simple harmonic oscillator. Such states can be expressed as superposition of a standard coherent state and a derivative state, which are neither completely quantum nor completely classical. Here, we introduce photon-added (-depleted) near coherent states [PA(D)NCS] through “m” times application of creation (annihilation) operators â†(â) to the near coherent state. A general analysis of nonclassical properties of the PA(D)NCS, such as sub-Poissonian statistics and squeezing effect, is given analytically and numerically in the context of the conventional quantum optics. We also derive the Wigner distribution function of the PA(D)NCS over phase space which may bear negative values, which is a good indication of their nonclassical properties. Finally, an experimental procedure for generating the PA(D)NCSs is established.
Are almost-symmetries almost linear?
Authors: Cuesta Javier , Wolf Michael M.
Published: August 2019

It d-pends. Wigner’s symmetry theorem implies that transformations that preserve transition probabilities of pure quantum states are linear maps on the level of density operators. We investigate the stability of this implication. On the one hand, we show that any transformation that preserves transition probabilities up to an additive ε in a separable Hilbert space admits a weak linear approximation, i.e., one relative to any fixed observable. This implies the existence of a linear approximation that is 4εd–close in Hilbert-Schmidt norm, with d the Hilbert space dimension. On the other hand, we prove that a linear approximation that is close in norm and independent of d does not exist in general. To this end, we provide a lower bound that depends logarithmically on d.
Study of the harmonic and interharmonic content in electrical signals from photovoltaic generation and their relationship with environmental factors
Authors: Elvira-Ortiz David A. , Morinigo-Sotelo Daniel , Duque-Perez Oscar , Osornio-Rios Roque A. , Romero-Troncoso Rene J.
Published: August 2019

The inclusion of renewable energies is associated with harmonic and interharmonic contamination due to the use of power inverters. Thus, several international standards have been developed to establish the admissible distortion levels associated with spectral contamination. However, these standards present limitations: interharmonics are not considered and only present limits for current signals and voltage are dismissed. This work assesses the spectral content introduced by photovoltaic generation in low voltage grids considering the existence of voltage harmonics and interharmonics. Additionally, a multiple linear regression analysis quantifies the effect of sun irradiance and photovoltaic cell temperature on harmonic and interharmonic distortion. The analysis is performed in real signals from a photovoltaic generation plant considering different weather conditions. The results prove that the spectral content in photovoltaic generation is variable throughout the day, and environmental factors can reasonably describe the behavior of harmonic and interharmonic distortion.
Observation of lower defect density brought by excess PbI2 in CH3NH3PbI3 solar cells
Authors: Jiang Minlin , Wu Yuxia , Zhou Yi , Wang Zuo
Published: August 2019

The introduction of excess PbI2 into CH3NH3PbI3 precursors has been reported to boost the efficiency of CH3NH3PbI3 solar cell. It was assumed that the excess PbI2 helped to reduce the defect density in CH3NH3PbI3 solar cell. In this work, by adding non-equimolar PbI2 into CH3NH3PbI3 precursor solution, PbI2-rich CH3NH3PbI3 solar cells have been fabricated. The efficiency of CH3NH3PbI3 solar cell was significantly improved from 14.14% to 16.80%. Results obtained from scanning electron microscopy (SEM) and X-ray diffraction (XRD) indicate that the excess PbI2 does not affect the morphological and crystal properties of CH3NH3PbI3 thin film. Based on time-resolved photoluminescence (TRPL) measurement, it was found that the carrier lifetime of PbI2-rich perovskite thin film was significantly increased. Lower defect density was observed in PbI2-rich CH3NH3PbI3 solar cell by admittance spectroscopy (AS) characterization, indicating PbI2 can suppress the formation of defects in CH3NH3PbI3 solar cells.
A parylene coating system specifically designed for producing ultra-thin films for nanoscale device applications
Authors: Gluschke J. G. , Richter F. , Micolich A. P.
Published: August 2019

We report on a parylene chemical vapor deposition system custom designed for producing ultrathin parylene films (5–100 nm thickness) for use as an electrical insulator in nanoscale electronic devices, including as the gate insulator in transistors. The system features a small deposition chamber that can be isolated and purged for process termination, a quartz crystal microbalance for monitoring deposition, and a rotating angled stage to increase coating conformity. The system was mostly built from off-the-shelf vacuum fittings allowing for easy modification and reduced cost compared to commercial parylene coating systems. The production of ultrathin parylene films for device applications is a niche not well catered to by commercial coating systems, which are typically designed to give thicker coatings (microns) with high uniformity over much larger areas. An added advantage of our design for nanoscale device applications is that the small deposition chamber is readily removable for transfer to a glovebox to enable parylene deposition onto pristine surfaces prepared in oxygen/water-free environments with minimal contamination.
Individual selective rotation of the linear polarization of single light beam in a bundle
Authors: Dimova Emiliya
Published: August 2019

An approach for aligning of linear polarized light beams with different wavelengths into a single beam with parallel linear polarization is presented and experimentally demonstrated. The main idea is based on the application of recently developed composite half-wave plates, working as linear polarization filters.
Study of an energy degrader made of B4C/graphite composites
Authors: Liang Zhikai , Liu Kaifeng , Liu Xu , Xiong Yongqian , Qin Bin
Published: August 2019

The HUST-PTF (proton therapy facility in Huazhong University of Science and Technology) is now under construction based on an isochronous superconducting cyclotron at Huazhong University of Science and Technology. Because the energy extracted by the cyclotron is fixed, an energy degrader is necessary to modulate the beam energy after the cyclotron for clinical requirements. However, the multiple Coulomb scattering that occurs in the degrader increases the beam emittance. Therefore, collimators are designed after the degrader to decrease the beam emittance. Because of the severe beam losses in the aforementioned energy degradation and emittance restriction, the main design consideration is improving the beam transmission efficiency. In this note, a novel energy degrader made of B4C/graphite composite (BGC) is studied regarding its material fabrication, improved beam transmission efficiency, energy degradation, emittance growth, and secondary-neutron yield using the Geant4 Monte Carlo software. Moreover, the thermal properties of the BGC degrader are analyzed. Finally, for a degrader with 40% boron content, the emittance after the degrader decreases by 5.5% and the transmission efficiency after the final collimator increases by 15.9% at 70 MeV compared with a pure-graphite degrader.
Lattice-constant and band-gap tuning in wurtzite and zincblende BInGaN alloys
Authors: Greenman Kevin , Williams Logan , Kioupakis Emmanouil
Published: August 2019

InGaN light-emitting diodes (LEDs) are more efficient and cost effective than incandescent and fluorescent lighting, but lattice mismatch limits the thickness of InGaN layers that can be grown on GaN without performance-degrading dislocations. In this work, we apply hybrid density functional theory calculations to investigate the thermodynamic stability, lattice parameters, and bandgaps of wurtzite and zincblende quaternary BInGaN alloys. We find that the wurtzite phase is more stable and can be lattice matched to GaN for BInGaN compositions containing up to ∼30% boron. The lattice match with GaN decreases strain and enables thicker active layers that mitigate Auger recombination and increase the efficiency of the LEDs. The bandgap of the alloy remains tunable throughout the visible spectrum. Our results indicate that BInGaN alloys are promising alternatives to InGaN for high-efficiency, high-power LEDs.
Thermal conductivity of strained silicon: Molecular dynamics insight and kinetic theory approach
Authors: Kuryliuk Vasyl , Nepochatyi Oleksii , Chantrenne Patrice , Lacroix David , Isaiev Mykola
Published: August 2019

In this work, we investigated the tensile and compression forces effect on the thermal conductivity of silicon. We used the equilibrium molecular dynamics approach for the evaluation of thermal conductivity considering different interatomic potentials. More specifically, we tested Stillinger-Weber, Tersoff, Environment-Dependent Interatomic Potential, and Modified Embedded Atom Method potentials for the description of silicon atom motion under different strain and temperature conditions. It was shown that the Tersoff potential gives a correct trend of the thermal conductivity with the hydrostatic strain, while other potentials fail, especially when the compression strain is applied. Additionally, we extracted phonon density of states and dispersion curves from molecular dynamics simulations. These data were used for direct calculations of the thermal conductivity considering the kinetic theory approach. Comparison of molecular dynamics and kinetic theory simulations results as a function of strain and temperature allowed us to investigate the different factors affecting the thermal conductivity of the strained silicon.
Verification of the global gyrokinetic stellarator code XGC-S for linear ion temperature gradient driven modes
Authors: Cole M. D. J. , Hager R. , Moritaka T. , Dominski J. , Kleiber R. , Ku S. , Lazerson S. , Riemann J. , Chang C. S.
Published: August 2019

XGC (X-point Gyrokinetic Code) is a whole-volume, total-f gyrokinetic particle-in-cell code developed for modeling tokamaks. In recent work, XGC has been extended to model more general 3D toroidal magnetic configurations, such as stellarators. These improvements have resulted in the XGC-S version. In this paper, XGC-S is benchmarked in the reduced delta-f limit for linear electrostatic ion temperature gradient-driven microinstabilities, which can underlie turbulent transport in stellarators. An initial benchmark of XGC-S in tokamak geometry shows good agreement with the XGC1, ORB5, and global GENE codes. A benchmark between XGC-S and the EUTERPE global gyrokinetic code for stellarators has also been performed, this time in the geometry of the optimized stellarator Wendelstein 7-X. Good agreement has been found for the mode number spectrum, mode structure, and growth rate.
Photoelectrochemical cells for solar hydrogen production: Challenges and opportunities
Authors: Chiu Yi-Hsuan , Lai Ting-Hsuan , Kuo Ming-Yu , Hsieh Ping-Yen , Hsu Yung-Jung
Published: August 2019

As the Holy Grail to a carbon-free hydrogen economy, photoelectrochemical (PEC) water splitting offers a promising path for sustainable production of hydrogen fuel from solar energy. Even though much progress has been made over the past decade, the effectiveness and robustness of PEC cells are still far from a mature phase that would allow for widespread deployment. This perspective discusses the key challenges facing the current level of PEC development and proposes experimental approaches and strategies that can be adopted to address the issues. Focuses are mainly placed on the employment of in situ and operando spectroscopic measurements, the introduction of alternative, high value-added oxidation reactions, and the creation of near infrared-responsive photoelectrodes. A brief outlook that may assist the future advancement of PEC technology is also presented.
Transient dielectric functions of Ge, Si, and InP from femtosecond pump-probe ellipsometry
Authors: Espinoza Shirly , Richter Steffen , Rebarz Mateusz , Herrfurth Oliver , Schmidt-Grund Rüdiger , Andreasson Jakob , Zollner Stefan
Published: August 2019

Transient dielectric functions with a 120 fs time resolution of Ge, Si, and InP were acquired from 1.7 to 3.5 eV with a femtosecond pump-probe rotating-compensator ellipsometer. The intensity of the pump laser (with 1.55, 3.10, or 4.65 eV photon energy) was adjusted to create an initial near-surface carrier density of 1020 cm−3. In Ge, there is a significant (∼15%) decrease in the E1 and E1 + Δ1 critical point absorption and a Kramers–Kronig consistent change in the refractive index because photoexcited electrons at L block these transitions and reduce their amplitudes. Only a small redshift of the E1 critical point is observed, which we attribute to lattice heating and exchange-correlation effects. Minimal changes were found for Si and InP, where electrons near Δ and Γ do not participate in interband transitions between 1.7 and 3.5 eV.
Optoelectronic properties of methyl-terminated germanane
Authors: Livache Clément , Ryan Bradley J. , Ramesh Utkarsh , Steinmetz Violette , Gréboval Charlie , Chu Audrey , Brule Thibault , Ithurria Sandrine , Prévot Geoffroy , Barisien Thierry , Ouerghi Abdelkarim , Panthani Matthew G. , Lhuillier Emmanuel
Published: August 2019

Germanane is a two-dimensional, strongly confined form of germanium. It presents an interesting combination of (i) ease of integration with CMOS technology, (ii) low toxicity, and (iii) electronic confinement which transforms the indirect bandgap of the bulk material into a direct bandgap featuring photoluminescence. However, the optoelectronic properties of this material remain far less investigated than its structural properties. Here, we investigate the photoluminescence and transport properties of arrays of methyl-terminated germanane flakes. The photoluminescence appears to have two contributions, one from the band edge and the other from trap states. The dynamics of the exciton appear to be in the range of 1–100 ns. Conduction in this material appears to be p-type, while the photoconduction time response can be made as short as 100 μs.
Understanding the effects of dipolar interactions on the thermodynamics of diblock copolymer melts
Authors: Kumar Rajeev , Li Wei , Sumpter Bobby G. , Muthukumar Murugappan
Published: August 2019

We present results highlighting the roles of dipolar interactions in affecting thermodynamics of diblock copolymer melts. Field theoretic methods and coarse-grained molecular dynamics (MD) simulations are used to understand the effects of dipolar interactions among copolymer segments. In particular, the effects of dipolar interactions on disorder-lamellar transition and domain spacing of the lamellar morphology are studied. It is shown that dipolar interactions stabilize the lamellar morphology over the disordered phase. Furthermore, the domain spacing for the lamellar morphology is predicted to increase with an increase in disparity between dipole moments of two kinds of monomers in the diblock or equivalently a mismatch in the dielectric constant of homopolymers forming the diblock. MD simulations reveal that additional orientational effects resulting from the anisotropic nature of the dipolar interaction potential are significant for highly polar monomers. In contrast, the field theoretic models based on orientationally averaged dipolar interaction potentials, such as those used in this work, fail to capture the effects of orientational correlations.
Depletion layer dynamics of polyelectrolyte solutions under Poiseuille flow
Authors: Park Seong Jun , Shakya Anisha , King John T.
Published: August 2019

Significance

The interfacial physics of complex liquids under flow remains a long-standing problem in fluid mechanics that is important for fields ranging from lubrication to nanofluidics. Liquids containing small amounts of high-molecular weight polymers are found to flow through channels faster than expected, a phenomenon attributed to the formation of boundary depletion layers that relaxes the no-slip boundary condition and allows the bulk of the fluid to slip past the walls. This work provides the most direct measurement to date of the dimension and composition of depletion layers of a polymer solution under flow. We anticipate extending this approach to help understand fluid dynamics in different regimes, such as flow in nanoconfinement and turbulence.
Final Report on GULFMET Supplementary Comparison of Inductance at 10 mH and 100 mH at 1 kHz (GULFMET.EM-S4)
Authors: Velychko Oleh , Shevkun Sergii , Bartholomew Jon , Alrobaish Abdullah M
Published: August 2019

An intercomparison of inductance at 10 mH and 100 mH at 1 kHz has taken place within the framework of GULFMET. The intercomparison, piloted by State Enterprise 'Ukrmetrteststandard'-UMTS (Ukraine), has involved three laboratories, including one who is a member of another regional metrological organization-COOMET (UMTS, Ukraine). The results presented in this report appear to show that there are significant differences between some laboratories' representations of the henry. However, the agreement demonstrated by the intercomparison provides confidence in maintaining traceability for the inductance at 10 mH and 100 mH.

KEY WORDS FOR SEARCH

Intercomparison, inductance, traceability, regional metrological organization

Main text

To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/.

The final report has been peer-reviewed and approved for publication by the CCEM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).
Final Report on EUROMET Project 881 / EURAMET.M.P-K7: High pressure comparisons between seven European National Laboratories Range 50 MPa to 500 MPa
Authors: Rantanen M , Saxholm S , Ackerholm M , Condereys A , Krajicek Z , Sabuga W , Verbeek J , Wüthrich C
Published: August 2019

An inter-comparison in the high oil pressure range was arranged in 2005 - 2007. The participating laboratories were CMI/Czech Republic, Metas/Switzerland, MIKES/Finland, NMi-VSL/The Netherlands, PTB/Germany, SMD/Belgium and SP/Sweden. CMI, Metas, NMi-VSL and PTB are pressure laboratories of the primary level, and the three others are traceable to LNE/France.

The transfer standard was a Desgranges & Huot piston-cylinder unit with a nominal effective area of 1,96 mm2, mounted in a D&H 5316 balance body. The participants determined the effective area at ten nominal pressures from 50 MPa to 500 MPa in steps of 50 MPa. All the results were in a good agreement with the reference values, calculated as weighted means of the results from the four primary level laboratories. The results fully support the uncertainties claimed in the CMC tables of the participants.

As the pressure distortion is the dominating source of uncertainty in this range, the claimed uncertainties were highest at 500 MPa, ranging from 5,6 · 10-5 of PTB to 1,2 · 10-4 of MIKES (expanded relative uncertainties, k = 2). Except for PTB, there were no big differences in the claimed uncertainties between the primary and the secondary level laboratories.

Some of the participants underestimated the uncertainties when giving their results in terms of the effective area at null pressure S0 and the pressure distortion coefficient, λ. The uncertainties given by some others were unnecessarily high.

The transfer standard was not as stable as expected, and the uncertainties of the reference values were to some extent increased by the observed drift.

The comparison, registered as EUROMET Project #881, was started as an informal one between MIKES, Metas, NMi-VSL and CMI, and in the beginning the rules for EUROMET comparisons were not strictly followed.

No links to other comparisons were made as the latest EUROMET key comparisons in the high pressure range were carried out more than twelve years ago. Linking will be made as soon as results from newer comparisons are available.

Edited in 2018:

The link between this comparison (EUROMET 881 / EURAMET.M.P.K7) and the key comparison CCM.P.K13 was calculated, and the original EUROMET 881 report (MIKES Publication J4/2007) was updated accordingly in 2018.

KEY WORDS FOR SEARCH

comparison, pressure, effective area, piston cylinder, pressure balance

Main text

To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/.

The final report has been peer-reviewed and approved for publication by the CCM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).
National Aures Observatory: A new multimessenger facility
Authors: Seghouani N , Boer M , Mimouni J
Published: August 2019

Algeria has taken upon itself to build a new astronomical observatory in the Aliness region in the Aures Mountains in Eastern Algeria to serve the aspirations of the Algerian astronomical community and also to open up for international projects. This Observatory will be mainly dedicated to multimessenger astronomy and the study of transient astronomical phenomena (optical counterparts of gravitational waves, GRBs, asteroid tracking, …), but it will also have other secondary objectives such as the study of early phases of super novae, Space Situational Awareness like surveillance programs, variable stars, exoplanets … In this paper, we describe the main scientific objectives of the National Aures Observatory as well as the rational for the choice of the Aliness region as the main candidate site for setting up the observatory. We will also present statistical cloud coverage from the analysis of EUMETSAT cloud data and will conclude with the present statute of the Observatory and the different stages for its construction
Sharjah Investment in the UAE Space Sector
Authors: Fernini Ilias M.
Published: August 2019

With the newly opened “Sharjah Center for Astronomy and Space Sciences,” the United Arab Emirates has entered a new age in space sciences exploration and research. The center has a state of the art digital planetarium, an astronomical observatory, and several research laboratories, i.e., “GIS and Remote Sensing Center,” “CubeSat Laboratory,” “Ionospheric Laboratory,” “Radio Astronomy Laboratory,” and a “Meteorite Center.” This paper will highlight the center and discusses its objectives in terms of public outreach and the advance of space sciences in the UAE.
From exoplanets to exocomets
Authors: Ferlet R
Published: August 2019

To date (June 2017), more than 3610 planets orbiting other stars than our Sun are known. We shall briefly review the main detection methods, together with some of the big surprises which arose since the discovery of the first exoplanet around a solar type star in 1995. It is now also possible to characterize the atmospheres of few extrasolar planets and exocomets become detectable.
Flora Diversity At Danau Pulau Besar-Danau Bawah-Zambrud National Park Area, Riau Province
Authors: Munawaroh Esti , Isnaini Yupi
Published: August 2019

Research on flora diversity at Danau Pulau Besar-Danau Bawah,Zamrud National Park Area, Riau province has been done. The flora in this area had not much known and exsposed. This study aimed to know the richness of flora in this national park. A total 65 species consisting of 48 genera and 35 family recorded from this area. They were 34 species of tree, 17 species of vines, and 14 species of bushes and herbs. There are 25 species of plant collection which is new collection or substitute collection that ever existed in Bogor Botanical Gardens. There were 4 species of flora have begun to decline in number in their natural habitat, such as: Chyrtotachys renda Blume, Nephenthes gracilis Karth, Nephenthes mirabilis Karth andNephenthes ampularia Jack.. The plant collection has been conserved or preserved in Bogor Botanical Gardens. The conservation aspect will be discussed in this paper.
Ethnobotany study of Dayak society medicinal plants utilization in Uut Murung District, Murung Raya Regency, Central Kalimantan
Authors: Wardah  , Sundari S
Published: August 2019

Research on ethnobotany study of Dayak society had been conducted in Uut Murung District, Murung Raya Regency, Central Kalimantan.Data was directly collected at the site by roaming method, semi structural interview and open ended of the selected interviewees. Medicinal plants species which are potential and utilized by the society for daily life were recorded and sampled for herbarium specimen. Collection number, location elevation, plant local name and its utilization were recorded for each sample. The results showed that not less than 104 species from 98 generasand58 families. Most of the families wereRubiaceae (11 species), Fabaceae (9 species), Euphorbiaceae (7 species), Moraceae (6 species), Zingiberaceae (4 species), Acanthaceae, Apocynaceae, Thelypteridaceae, Rutaceae, Phyllanthaceae, respectively 3 species, and other families were one species, respectively. Based on the stature, they consisted of trees(30.16 %), shrubs (25.96 %), herbs (18.26 %), climber (13.46 %), Fern (5.77 %), grass (3.85%), and epiphyte(0.96%). Ethnobotany study of plant utilization is expressed in the manuscript.
The Role of Seed Banking Technology in The Management of Biodiversity in Indonesia
Authors: Latifah D , Widyatmoko D , Rakhmawati S U , Zuhri M , Hardwick K , Darmayanti A S , Wardhani P K
Published: August 2019

Indonesian biodiversity including the rich flora is facing various threats, including deforestation, habitat degradation, fire, natural disasters and climate change. Many ex situ conservation strategies have been implemented in response to this problem, including the development of new local botanic gardens in each province throughout Indonesia. The purpose of this paper is to reveal the important role of seed banks in forming part of the botanic gardens’ collections management strategies – they now play an increasingly important role in saving the Indonesian flora from extinction. This study was conducted by undertaking a literature review and analysis of secondary data on the four largest botanic gardens of Indonesia. Currently there are 33 botanic gardens in Indonesia consisting of five national botanic gardens under Lembaga Ilmu Pengetahuan Indonesia (LIPI/Indonesian Institute of Sciences), two botanic gardens under universities and 26 botanic gardens managed by Local Goverments. Among the five national botanic gardens, four manage seed banks: the Seed Bank of the Center for Plant Conservation Botanic Gardens/Bogor Botanic Gardens banks 749 accessions covering 460 species, 305 genera and 114 families; Cibodas Botanic Garden Seed Bank has 61 accessions covering 57 species, 57 genera, 40 families; Purwodadi Botanic Garden Seed Bank has 413 accessions covering 207 species, 134 genera and 46 families; and Eka Karya Bali Botanic Garden Seed Bank maintains 132 accessions covering 89 species, 43 genera and 21 families. The Indonesian Botanic Garden Seed Banks thus hold 1,355 accessions in total, covering less than 1% of total Indonesian plant diversity. In order to increase this coverage, Indonesian seed banking capacity needs to be increased, through the technical development of existing seed banks and the engagement of local botanic gardens throughout Indonesia to establish mini seed banks using the community seed bank approach.
Towards sustainable marine and coastal planning for Taka Bonerate Kepulauan Selayar Biosphere Reserve: Indonesian case study to The Global Challenge Research Fund Blue Communities Project
Authors: Garniati Leuserina , Iswadi Agung , Praptiwi Radisti , Sugardjito J.
Published: August 2019

Global Challenge Research Fund (GCRF) Blue Communities is a 4 year research and capacity building project for sustainable interactions with marine ecosystems for the benefit of the health, wellbeing, food security and livelihoods of coastal communities in East and South East Asia. Kepulauan Selayar (Selayar Islands), including Taka Bonerate as a Biosphere Reserve and part of the UNESCO’s Man and Biosphere (MAB) Network has been selected as a case study site for the GCRF Blue Communities project in Indonesia. A single case study approach with mixed methods are used to generate knowledge, identify knowledge gap, and triangulate findings. The ongoing research has collated up-to-date knowledge on: (1) current natural resources management strategy in place and what should be adopted in the future and (2) current and projected profile of energy demand-supply. In the next phases of delivery it will inform policy makers and implementers of the mechanisms to optimise sustainable livelihood strategies by: (1) accelerating positive contributions toward sustainable livelihood and (2) mitigating and preventing threats and pressures to sustainable livelihood. Finally it puts forwards strategic recommendations for decision making points which are evidenced-based and holistic, encompassing: (1) best practice policy for sustainable livelihood and (2) community empowerment and programme sustainability.
The Luki and Yangambi Biosphere Reserves: laboratories for climate change research and sustainable development
Authors: Beeckman Hans
Published: August 2019

The UNESCO Biosphere reserves of Yangambi (235 000 ha) and Luki (33 000 ha) are both situated within the semi-deciduous moist forests of the Democratic Republic of the Congo. These forests are part of the second largest tropical rainforest belt in the world and signify still a persistent carbon sink, rich in biodiversity and an essential provider of ecosystem services, including natural resources for economic development. Luki and Yangambi offer, thanks to the concept of Biosphere Reserve, an appealing opportunity to develop activities of research, training and education and serve, as such, as potential models for the reconciliation of nature conservation, economy and welfare. Both Yangambi and Luki have a particularly rich history of research. They can be considered as the cradle for investigations in Central-African botany, forest ecology, tree physiology, climatology, tropical agronomy and sylviculture. The archives, databases and scientific reference collections (curated both locally and in natural history collections in Belgium) related to these reserves are a treasure trove for actual research needs in the domains of global change (evaluations of carbon fluxes) and forest resilience. Some experimental plots are still present after their establishment, 70 years ago, and offer unique research material, in a region where there is a dire need for long term observations of vegetation dynamics and environmental fluctuations. We give an overview of ongoing research projects relevant to the topics of carbon fluxes and forest resilience, all including wood analysis in a context of vegetation history, tree physiology and forest ecology. We show how this is relevant for designing biodiversity management and we demonstrate how the MAB reserves of Luki and Yangambi are key research sites to document the debates on global changes and resilience of rainforests.
The ratio Influence of the polystyrene mixture and heating rate towards yield and pyrolysis results compound
Authors: Selpiana  , Aprianti Tine , Pramayuda Dede , Ismoro Damar Setyo
Published: August 2019

The widespread use of plastics in the community has resulted in increased waste. Plastics are synthetic polymers that are formed as products of fossil fuel and that are difficult to decompose naturally. This research used the pyrolysis process on a fixed bed reactor to utilize plastic waste especially polystyrene type. The raw materials in this study are high impact polystyrene (HIPS), expanded polystyrene (EPS) and oriented polystyrene (OPS). The ratios of raw material (HIPS: EPS: OPS) are 1:0:0, 0:1:0, 0:0:1, 2:1:1, 1:2:1, 1:1:2, and 1:1:1 also heating rates at 2 °C/min, 4 °C/min, 6 °C/min, 8 °C/min and 10 °C/min. The highest yield at 0:0:1 ratio and with a heating rate of 10 °C/min. The heating rate of 10 °C/min generated the highest amount of yields in general at each ratio. Analysis of the compound using Gas Chromatography-Mass Spectrometry (GC-MS). The compound was dominated by aromatic hydrocarbons, with dominant compounds of ethylbenzene, p-xylene, styrene, 2-phenyl- 1propene, 1,3-diphenyl propane and methyl styrene.
The Potential of Palm Oil Mill Effluents and Bacillus amyloliquefaciens EB13 in Reducing of Ganoderma boninense Disease in Oil Palm
Authors: Yuliar
Published: August 2019

Indonesia is the largest palm oil producing country in the world. Ganoderma boninese disease is the most destructive that cause limiting factor in production of oil palm. It is a crucial to discover an effective management strategy for a serious threat of basal stem rot disease of G. boninense in oil palm. The objective of this research was to assess the possible use of palm oil mill effluents (POME) and Bacillus amyloliquefaciens EB13 in reducing of oil palm disease caused by G. boinense. In greenhouse experiment has shown that POME and B. amyloliquefaciens EB13 significantly reduced disease index (DI) of oil palm disease from 4.0 to 2.3 and from 4 to 1.8 respectively. Biocontrol efficacy of B.amyloliquefacient and POME were 70.9 and 70.4 respectively. The addition of POME into soil has significantly reduced population of fungy from 40.0 to 1.8 x 104 CFU g−1 fresh soil, and the addition of B. amyloliquefaciens reduced population of fungy from 40.0 to 2.3 x104 CFU g−1 fresh soil. Amount of bacteria population increased from 13.8 to 19.0 x 106 CFU g−1 fresh soil by adition of POME, even the increasing was not significant. While addition of B. amyloliquefaciens significantly increased bacteria population from 13.8 to 56.8 x106 CFU g−1 fresh soil. Laccase activity in soil inoculated only with G. boninense would significantly highest compared with combined treatment of POME and G. boninenese, and the combined treatment of B. amyloliquefaciens and G. boninense, their activities were 2991.2 UmL−1, 1140.6 UmL−1, and 609,6 UmL−1 respectively. Lignin peroxidase activity in soil inoculated only with G. boninense and soil with combined treatment of POME and G.boninense higher than the combined treatment of soil with B. amyloliquefaciens and G.boninense, their activities were 666.4 UmL−1, 655.3 UmL−1, and 492.4 UmL−1 respectively. The highest activity of mangan peroxidase was detected in soil inoculated only with G. boninense compared with combined treatment of POME and G. boninense, and the combined treatment of B. amyloliquefaciens and POME, although the differences were not significant, their activities were 202.3 UmL−1, 146.3 UmL−1, and 148.9 UmL−1.
Insects that damage the wild populations of Malus sieversii in Kazakhstan
Authors: Jashenko R , Tanabekova G
Published: August 2019

Malus sieversii is one of the main forest-forming wild-growing species in the mountain ecosystems of the south and southeast of Kazakhstan. Unfortunately, over the past half century, the area of wild populations of M. sieversii has dramatically decreased. One of the main dangers for this species is now insect pests, which caused huge damage to these wild forests. The main part of harmful to the wild apple organisms are arthropods, harming various degrees. Currently, there are 7 species of acariformes, 120 insect species from 7 orders associated with M. sieversii.
The conservation of ecosystem and biological diversity in Alakol Biosphere Reserve (East Kazakhstan)
Authors: Jashenko R , Maltseva E , Ilina V
Published: August 2019

Alakol Biosphere Reserve includes Alakol-Sasykkol lake system and is situated in Alakol depression. Its total area is 193 089.9 ha including water areas (529 300 ha): the core zone is 19 712,9 ha, buffer zone – 26 667 ha and transition zone – about 511 300 ha. There are 58 ecosystems in the Reserve’s territory, grouped in 3 orders: terrestrial natural (35 types), aquatic (10 types) and terrestrial anthropogenically transformed (13 types) ecosystems. The largest area is occupied by terrestrial natural ecosystems (49.45%), followed by aquatic ecosystems (44.37%) and anthropogenically transformed ecosystems, which are registered for comparatively large area (13.43%). Terrestrial natural ecosystems are merely touched by human activity and occupy large spaces mainly on the territory of the core and buffer zone of Alakol Reserve, as well as Eastern and South-Eastern parts of the transition zone. Biosphere Reserve as a whole is situated in transition zone between Dzhungar and Northern-Turan desert types, and this is the cause of unique vegetation associations with peculiar floristic composition and different geographic orientation. Zonal spectrum of foothill plains is characterized by the change of ephemeroid-Artemisia deserts on sierozem soils, steppified cereal-Artemisia deserts on brown soils and genuine deserts on gray-brown soils. Central lowest part of Alakol depression is occupied by lakes surrounded by hydromorphous vegetation (meadow and marsh vegetation). The territory of biosphere reserve is located on the Central Asian – Indian bird migration route and is a wetland of world significance as waterbirds’ habitat and aggregation site. The biosphere reserve reflects regional ecosystem and biological diversity and represents rich composition of flora and fauna.