bluuebunny/crossref_metadata_2025_split huggingface dataset:
"Does Inflation Targeting Framework Make a Significant Difference in Lowering Price Level?” What is Its Implication to Indonesia’s Inflation Rate?
Authors: Rachman Faisal 
Published: March 2018

AbstractIn the last two decades many countries have been starting to employ Inflation Targeting Framework (ITF) as their main monetary policy framework. This is done to achieve an objective of anchoring public expectation on inflation which in the end will steer the price level movement towards ITF’s ultimate target of relatively low and stable inflation rate. By conducting Difference-in-Difference method on panel data consisting of five countries implementing ITF since 2001 and twenty-one selected non-ITF countries for period 1990-2010, it is statistically proved that ITF adoption has a significant effect on inflation. In case of Indonesia, through Structural Break approach, the implementation of ITF since 2005 is also proved able to lower and stabilize inflation rate.Abstrak Dalam dua dekade terakhir ini banyak negara yang telah mulai menggunakan Inflation Targeting Framework (ITF) sebagai kerangka utama kebijakan moneter mereka. Hal ini dilakukan guna mencapai tujuan pengendalian ekspektasi publik yang pada akhirnya akan mengendalikan pergerakan tingkat harga relatif rendah and stabil. Dengan menggunakan metode Difference-in-Difference pada data panel, yang terdiri dari lima negara yang telah mengimplementasikan ITF sejak tahun 2001 dan dua puluh satu negara bukan pengguna ITF, untuk periode 1990-2010, disimpulkan bahwa ITF memiliki dampak signifikan pada tingkat inflasi. Untuk kasus Indonesia yang telah mengimplementasikan ITF sejak tahun 2005, melalui metode Structural Break disimpulkan hasil yang sama, yaitu tingkatan harga yang rendah dan stabil.
Oil Exploration Economics: Empirical Evidence from Indonesian Geological Basins
Authors: Patria Harry , Adrison Vid 
Published: March 2018

Oil exploration has been subject to economic research for decades. Earlier studies of exploration models are mostly discussed the behavior of exploration at the macro-level analysis such as field, firm, region, and continental. This paper then focuses on the geological and economic factors that determine the well-drilling decision at the micro-level using disaggregated panel data of 32 geological basins in Indonesia over the period of 2004–2013. This study shows that the number of drilled wells is determined significantly by the lag of success rate, lag of discovery size, lag of global oil price, and regional location of geological basin. AbstrakEksplorasi migas telah menjadi subyek ekonomi dalam beberapa dekade. Studi-studi sebelumnya dengan model eksplorasi, kebanyakan mengembangkan model Fisher (1964), secara umum dikelompokkan oleh persamaan yang menjelaskan respons eksplorasi pada tingkat makro menggunakan lapangan, perusahaan, wilayah, dan kontinental. Paper ini fokus pada analisis faktor-faktor geologi dan ekonomi yang menentukan tingkat sumur pemboran pada tingkat mikro menggunakan data panel dari 32 basin di Indonesia dalam periode 2004–2013. Hasil empiris menunjukkan bahwa tingkat sumur pemboran ditentukan secara signifikan berdasarkan tingkat keberhasilan pemboran, ukuran temuan dan harga minyak pada tahun sebelumnya serta lokasi basin geologis.Kata kunci: Pengeboran; Variabel Geologi; Variabel Ekonomi; EksplorasiJEL classifications: L71; Q35
Gender, age, and concomitant diseases of melanosis coli in China: a multicenter study of 6,090 cases
Authors: Wang Shufang , Wang Zikai , Peng Lihua , Zhang Xiuli , Li Jianfeng , Yang Yunsheng , Hu Bing , Ning Shoubin , Zhang Bingyong , Han Junling , Song Ying , Sun Gang , Nie Zhanguo 
Published: March 2018

Backgrounds and AimsMelanosis coli (MC) is a noninflammatory, benign, and reversible colonic disorder, but its detection rates in China are unclear. We therefore aimed to analyze the epidemiological characteristics of MC in China.MethodsWe assessed the detection rates, associated factors and concomitant diseases of MC in the patients who underwent colonoscopy at eight medical centers across five regions of China between January 2006 and October 2016. All data were procured from the electronic database established at each participating institutions.ResultsAmong the 342,922 included cases, MC was detected in 6,090 cases (detection rate = 1.78%, 95% confidence interval, 1.73%–1.82%) at a mean age of 60 years. The detection rate gradually increased yearly, and along with the increasing age regardless of gender, while a rapid increase presented in the patients ≥60 years of age (0.58% for ≤25 years, 1.22% for 25–59 years, and 3.19% for ≥60 years). The detection rate was higher in females than in males; however, the rate of per-year increase was higher in males than in females at age of ≥60 years, which was 1.85-fold of that in females. Among cancer, polyp, inflammation, and diverticula, polyp was the most common concomitant disease of MC and identified in 41.72% of MC patients.ConclusionsMC detection rates were increased annually and elevated in older patients, particularly in male patients. Males in the elderly population of ≥60 years were most likely to have MC. Colonic polyp is the most common concomitant disease of MC.
Low‐Altitude Ion Heating, Downflowing Ions, and BBELF Waves in the Return Current Region
Authors: Shen Yangyang , Knudsen David J. , Burchill Johnathan K. , Howarth Andrew D. , Yau Andrew W. , Miles David M. , James H. Gordon , Perry Gareth W. , Cogger Leroy 
Published: March 2018

AbstractHeavy (O+) ion energization and field‐aligned motion in and near the ionosphere are still not well understood. Based on observations from the CAScade, Smallsat and IOnospheric Polar Explorer (CASSIOPE) Enhanced Polar Outflow Probe at altitudes between 325 km and 730 km over 1 year, we present a statistical study (24 events) of ion heating and its relation to field‐aligned ion bulk flow velocity, low‐frequency waves, and field‐aligned currents. The ion temperature and field‐aligned bulk flow velocity are derived from 2‐D ion velocity distribution functions measured by the suprathermal electron imager (SEI) instrument. Consistent ion heating and flow velocity characteristics are observed from both the SEI and the rapid‐scanning ion mass spectrometer instruments. We find that transverse O+ ion heating in the ionosphere can be intense (up to 4.5 eV), confined to very narrow regions (∼2 km across B), is more likely to occur in the downward current region and is associated with broadband extremely low frequency (BBELF) waves. These waves are interpreted as linearly polarized perpendicular to the magnetic field. The amount of ion heating cannot be explained by frictional heating, and the correlation of ion heating with BBELF waves suggests that significant wave‐ion heating is occurring and even dominating at altitudes as low as 350 km, a boundary that is lower than previously reported. Surprisingly, the majority of these heating events (17 out 24) are associated with core ion downflows rather than upflows. This may be explained by a downward pointing electric field in the low‐altitude return current region.
Two Day Wave Traveling Westward With Wave Number 1 During the Sudden Stratospheric Warming in January 2017
Authors: Xiong Jiangang , Wan Weixing , Ding Feng , Liu Libo , Hu Lianhuan , Yan Chunxiao 
Published: March 2018

AbstractQuasi‐two day wave propagating westward with wave number 1 (W1) in January 2017 is studied using global temperature observed by Sounding of the Atmosphere using Broadband Emission Radiometry and wind observed by a meteor radar at Fuke, China (19.0°N, 109.8°E). The amplitude of W1 significantly enhances during January 2017, when two stratospheric warming events occur. The temperature perturbation of W1 reaches maximum amplitude of more than 6 K at latitude ±15° around ~84 km and ~95 km. The structure of temperature W1 is symmetric with regard to the equator. The temporal variation of W1 is consistent with the stationary planetary wave with wave number 2 (SPW2), but contrary to the quasi‐two day wave propagating westward with wave number 3 (W3). When SPW2 is large during two sudden stratospheric warming events, energy transfers from W3 to W1. Two bursts of the 2 day wave in meridional wind observed by the meteor radar are just corresponding to the local maxima of W3 and W1, respectively. We conclude that during January 2017, W1 is generated by the nonlinear interaction between SPW2 and W3. SPW2 which is modulated by the quasi‐16 day perturbation in the stratosphere plays a key role in the energy transmission from W3 to W1, and it is responsible for the 16 day variation of W1.
Improvement of Mars Surface Snow Albedo Modeling in LMD Mars GCM With SNICAR
Authors: Singh D. , Flanner M. G. , Millour E. 
Published: March 2018

AbstractThe current version of Laboratoire de Météorologie Dynamique (LMD) Mars GCM (original‐MGCM) uses annually repeating (prescribed) CO2 snow albedo values based on the Thermal Emission Spectrometer observations. We integrate the Snow, Ice, and Aerosol Radiation (SNICAR) model with MGCM (SNICAR‐MGCM) to prognostically determine H2O and CO2 snow albedos interactively in the model. Using the new diagnostic capabilities of this model, we find that cryospheric surfaces (with dust) increase the global surface albedo of Mars by 0.022. Over snow‐covered regions, SNICAR‐MGCM simulates mean albedo that is higher by about 0.034 than prescribed values in the original‐MGCM. Globally, shortwave flux into the surface decreases by 1.26 W/m2, and net CO2 snow deposition increases by about 4% with SNICAR‐MGCM over one Martian annual cycle as compared to the original‐MGCM simulations. SNICAR integration reduces the mean global surface temperature and the surface pressure of Mars by about 0.87% and 2.5%, respectively. Changes in albedo also show a similar distribution to dust deposition over the globe. The SNICAR‐MGCM model generates albedos with higher sensitivity to surface dust content as compared to original‐MGCM. For snow‐covered regions, we improve the correlation between albedo and optical depth of dust from −0.91 to −0.97 with SNICAR‐MGCM as compared to the original‐MGCM. Dust substantially darkens Mars's cryosphere, thereby reducing its impact on the global shortwave energy budget by more than half, relative to the impact of pure snow.
Solar Wind Access to Grains in the Upper Layer of Regolith
Authors: Kulchitsky Anton V. , Hurley Dana M. , Johnson Jerome B. , Duvoy Paul X. , Zimmerman Michael 
Published: March 2018

AbstractThe surface of the Moon is exposed to the solar wind and the particles can reach a few average grains deep into the regolith. This work examines the depth of penetration of solar wind particles in lunar regolith using equations derived from analytical, Monte Carlo, and ray tracing techniques and discrete element method simulations. It is shown that the process can be approximately described using an exponential distribution function starting from some small depth with parameters depending on void ratio, solar wind incidence angle, and regolith grain size distribution. The proton implantation rate into the regolith as a function of depth is proposed with the coefficients computationally derived from Monte Carlo simulations of proton implantation process.
Process‐Oriented Modeling of a High Arctic Tundra Ecosystem: Long‐Term Carbon Budget and Ecosystem Responses to Interannual Variations of Climate
Authors: Zhang Wenxin , Jansson Per‐Erik , Schurgers Guy , Hollesen Jørgen , Lund Magnus , Abermann Jakob , Elberling Bo 
Published: March 2018

AbstractTerrestrial carbon (C) cycling in high Arctic tundra depends on ecosystem responses to climatic warming and concurrent changes in environmental conditions. There are very few studies to quantify long‐term C budget in high Arctic tundra due to lack of sufficient measurements. Here based on well‐established multiyear measurements, we calibrated a process‐oriented model (CoupModel) to quantify various components of the C budget at a Cassiope tetragona heath ecosystem in northeast Greenland. Net ecosystem exchange of CO2 (NEE) for 2000–2014 was estimated at −15 ± 10 g C m−2 yr−1. Ecosystem respiration (ER) for nongrowing seasons was estimated at 10.3 ± 5.3 g C m−2 yr−1, representing around 13% of the annual ER. Significant trends for interannual variations of aboveground and belowground C fluxes and stocks were found for the subperiods (i.e., 2000–2008 and 2008–2014) but not for the entire period. Interannual variations of NEE largely relied on the response of gross primary production (GPP) and ER to seasonal changes in climate. Moreover, the model showed that interannual variations of GPP, ER, and NEE had a much higher linear correlation with July temperature and annual maximum thawing depth (ALDmax) than other climatic and site characteristics. ALDmax had the highest correlation with the decomposition rate of humus C. Overall, this modeling study suggests that a sink‐source transition of the studied ecosystem depends on ecosystem responses to interannual variations of climate and that the net C balance may be sensitive to summer warmth and active layer thickness.
Effects of Extreme Events on Arsenic Cycling in Salt Marshes
Authors: Northrup Kristy , Capooci Margaret , Seyfferth Angelia L. 
Published: March 2018

AbstractExtreme events such as storm surges, intense precipitation, and supermoons cause anomalous and large fluctuations in water level in tidal salt marshes, which impacts the sediment biogeochemistry that dictates arsenic (As) cycling. In addition to changes in water level, which impacts soil redox potential, these extreme events may also change salinity due to freshwater inputs from precipitation or saltwater inputs due to surge. It is currently unknown how As mobility in tidal salt marshes will be impacted by extreme events, as fluctuations in salinity and redox potential may act synergistically to mobilize As. To investigate impacts of extreme events on As cycling in tidal salt marshes, we conducted a combined laboratory and field investigation. We monitored pore water and soil samples before, during, and after two extreme events: a supermoon lunar eclipse followed by a storm surge and precipitation induced by Hurricane Joaquin in fall 2015 at the St. Jones Reserve in Dover, Delaware, a representative tidal salt marsh in the Mid‐Atlantic United States. We also conducted soil incubations of marsh sediments in batch and in flow‐through experiments in which redox potential and/or salinity were manipulated. Field investigations showed that pore water As was inversely proportional to redox potential. During the extreme events, a distinct pulse of As was observed in the pore water with maximum salinity. Combined field and laboratory investigations revealed that this As pulse is likely due to rapid changes in salinity. These results have implications for As mobility in the face of extreme weather variability.
Selective Leaching of Dissolved Organic Matter From Alpine Permafrost Soils on the Qinghai‐Tibetan Plateau
Authors: Wang Yinghui , Xu Yunping , Spencer Robert G. M. , Zito Phoebe , Kellerman Anne , Podgorski David , Xiao Wenjie , Wei Dandan , Rashid Harunur , Yang Yuanhe 
Published: March 2018

AbstractOngoing global temperature rise has caused significant thaw and degradation of permafrost soils on the Qinghai‐Tibetan Plateau (QTP). Leaching of organic matter from permafrost soils to aquatic systems is highly complex and difficult to reproduce in a laboratory setting. We collected samples from natural seeps of active and permafrost layers in an alpine swamp meadow on the QTP to shed light on the composition of mobilized dissolved organic matter (DOM) by combining optical measurements, ultrahigh‐resolution Fourier transform ion cyclotron resonance mass spectrometry, radiocarbon (14C), and solid‐state 13C nuclear magnetic resonance spectroscopy. Our results show that even though the active layer soils contain large amounts of proteins and carbohydrates, there is a selective release of aromatic components, whereas in the deep permafrost layer, carbohydrate and protein components are preferentially leached during the thawing process. Given these different chemical characteristics of mobilized DOM, we hypothesize that photomineralization contributes significantly to the loss of DOM that is leached from the seasonally thawed surface layer. However, with continued warming, biodegradation will become more important since biolabile materials such as protein and carbohydrate are preferentially released from deep‐layer permafrost soils. This transition in DOM leachate source and associated chemical composition has ramifications for downstream fluvial networks on the QTP particularly in terms of processing of carbon and associated fluxes.
Current Systems in the Earth's Magnetosphere
Authors: Ganushkina N. Yu. , Liemohn M. W. , Dubyagin S. 
Published: March 2018

AbstractThe basic structure and dynamics of the primary electric current systems in the Earth's magnetosphere are presented and discussed. In geophysics, the word current is used to describe the flow of mass from one location to another, and its analog of electric current is a flow of charge from one place to another. An electric current is associated with a magnetic field, and they combine with the Earth's internally generated dipolar magnetic field to form the topology of the magnetosphere. The concept of an electric current is reviewed and compared with other approaches to investigate the physics of the magnetosphere. The implications of understanding magnetospheric current systems are discussed, including paths forward for new investigations with the robust set of observations being produced by the numerous scientific and commercial satellites orbiting Earth.
Modeling the Lower Part of the Topside Ionospheric Vertical Electron Density Profile Over the European Region by Means of Swarm Satellites Data and IRI UP Method
Authors: Pignalberi A. , Pezzopane M. , Rizzi R. 
Published: March 2018

AbstractAn empirical method to model the lower part of the ionospheric topside region from the F2 layer peak height to about 500–600 km of altitude over the European region is proposed. The method is based on electron density values recorded from December 2013 to June 2016 by Swarm satellites and on foF2 and hmF2 values provided by IRI UP (International Reference Ionosphere UPdate), which is a method developed to update the IRI model relying on the assimilation of foF2 and M(3000)F2 data routinely recorded by a network of European ionosonde stations. Topside effective scale heights are calculated by fitting some definite analytical functions (α‐Chapman, β‐Chapman, Epstein, and exponential) through the values recorded by Swarm and the ones output by IRI UP, with the assumption that the effective scale height is constant in the altitude range considered. Calculated effective scale heights are then modeled as a function of foF2 and hmF2, in order to be operationally applicable to both ionosonde measurements and ionospheric models, like IRI. The method produces two‐dimensional grids of the median effective scale height binned as a function of foF2 and hmF2, for each of the considered topside profiles. A statistical comparison with Constellation Observing System for Meteorology, Ionosphere, and Climate/FORMOsa SATellite‐3 collected Radio Occultation profiles is carried out to assess the validity of the proposed method and to investigate which of the considered topside profiles is the best one. The α‐Chapman topside function displays the best performance compared to the others and also when compared to the NeQuick topside option of IRI.
Randomized Truncated SVD Levenberg‐Marquardt Approach to Geothermal Natural State and History Matching
Authors: Bjarkason Elvar K. , Maclaren Oliver J. , O'Sullivan John P. , O'Sullivan Michael J. 
Published: March 2018

AbstractThe Levenberg‐Marquardt (LM) method is commonly used for inverting models used to describe geothermal, groundwater, or oil and gas reservoirs. In previous studies, LM parameter updates have been made tractable for highly parameterized inverse problems with large data sets by applying matrix factorization methods or iterative linear solvers to approximately solve the update equations. Some studies have shown that basing model updates on the truncated singular value decomposition (TSVD) of a dimensionless sensitivity matrix achieved using Lanczos iteration can speed up the inversion of reservoir models. Lanczos iterations only require the sensitivity matrix times a vector and its transpose times a vector, which are found efficiently using adjoint and direct simulations without the expense of forming a large sensitivity matrix. Nevertheless, Lanczos iteration has the drawback of being a serial process, requiring a separate adjoint solve and direct solve every Lanczos iteration. Randomized methods, developed for low‐rank matrix approximation of large matrices, are more efficient alternatives to the standard Lanczos method. Here we develop LM variants which use randomized methods to find a TSVD of a dimensionless sensitivity matrix when updating parameters. The randomized approach offers improved efficiency by enabling simultaneous solution of all adjoint and direct problems for a parameter update.
Rationalizing Fabrication and Design Toward Highly Efficient and Stable Blue Light‐Emitting Electrochemical Cells Based on NHC Copper(I) Complexes
Authors: Weber Michael D. , Fresta Elisa , Elie Margaux , Miehlich Matthias E. , Renaud Jean‐Luc , Meyer Karsten , Gaillard Sylvain , Costa Rubén D. 
Published: March 2018

AbstractRecently, the use of a new family of electroluminescent copper(I) complexes—i.e., the archetypal [Cu(IPr)(3‐Medpa)][PF6] complex; IPr: 1,3‐bis‐(2,6‐di‐iso‐propylphenyl)imidazole‐2‐ylidene; 3‐Medpa: 2,2′‐bis‐(3‐methylpyridyl)amine—has led to blue light‐emitting electrochemical cells (LECs) featuring luminances of 20 cd m−2, stabilities of 4 mJ, and efficiencies of 0.17 cd A−1. Herein, this study rationalizes how to enhance these figures‐of‐merit optimizing both device fabrication and design. On one hand, a comprehensive spectroscopic and electrochemical study reveals the degradation of this novel emitter in common solvents used for LEC fabrication, as well as the impact on the photoluminescence features of thin‐films. On the other hand, spectro‐electrochemical and electrochemical impedance spectroscopy assays suggest that the device performance is strongly limited by the irreversible formation of oxidized species that mainly act as carrier trappers and luminance quenchers. Based on all of the aforementioned, device optimization was realized using ionic additives and a hole transporter either as a host–guest or as a multilayered architecture approach to decouple hole/electron injection. The latter significantly enhances the LEC performance, reaching luminances of 160 cd m−2, stabilities of 32.7 mJ, and efficiencies of 1.2 cd A−1. Overall, this work highlights the need of optimizing both device fabrication and design toward highly efficient and stable LECs based on cationic copper(I) complexes.