bluuebunny/crossref_metadata_2025_split huggingface dataset:
A clinical case series of Acanthamoeba keratitis diagnosed by a simple technique of detection of motile trophozoites in wet mount preparation
Authors: Roy Parthasarathi , Kundu Pratip , Maji Ardhendu Kumar 
Published: March 2023

Acanthamoeba keratitis is diagnosed fairly late because of lack of early clinical suspicion and unavailability of simple and effective technique for detection of the protozoa in ordinary laboratory settings. The detection of motile trophozoites in wet mount preparation of corneal scraping is probably the best confirmatory test of Acanthamoeba keratitis in ordinary laboratory settings. However, it is not easy to demonstrate motile trophozoites given the fact that the trophozoites rapidly encyst outside living tissue. We employed a protocol of preparation and transport of the wet mount to the nearby laboratory within fifteen minutes whereby optimum chance of demonstration of motile trophozoites was possible. We had been successful to detect the typical amoeboid movement of acanthamoeba in three cases. Healing of ulcers were achieved by an appropriate therapy in all three cases. Visual recovery was good in two out of three cases. To the best of our knowledge, the present case series is the first one in English literature where diagnosis of acanthamoeba keratitis is based solely on detection of motile trophozoites in direct wet mount examination. A careful history and an incisive look into the corneal lesion revealed some clue to suspect the acanthamoeba etiology. Simple laboratory technic employing wet mount microscopy rapidly confirmed the diagnoses. Healing of ulcers were achieved in all three cases by instillation of 0.02% chlorhexidine eye drop. Visual recovery was good in two out of three cases.
Islamic Versus Conventional Monetary Transmission: Which One Is Better Affecting Exchange Rate?
Authors: Kafabih An'im , Darwanto Darwanto , Gojali Dudang 
Published: March 2023

This study examined the impact of Islamic monetary and conventional transmissions on Indonesia's exchange rate performance. The Islamic monetary transmissions are musyarakah financing (proxied by the ratio of musyarakah to a total loan of conventional banks) and corporate sukuk (asset price), while the conventional transmission is the interbank interest rate (INTERB). Furthermore, this paper also incorporated gold price (GP) (asset price transmission) as a control variable. This study used monthly data from February 2011 to September 2021. By using the ARDL Bound Test, the long run results showed that the performance of Islamic monetary transmission through musyarakah financing has more effect of exchanging rate than INTERB. Therefore, Bank Indonesia should focus on musyarakah financing as its monetary transmission instead of INTERB. In the short run, corporate sukuk and musyarakah financing impact the exchange rate (10% and 1% significant level, respectively), while INTERB and GP can affect the exchange rate with lag (second month onward for each).
Penerapan Project Based Learning (PjBL) untuk Meningkatkan Hasil Belajar Siswa Kelas XII IPA 1 SMA N 2 Percut Sei Tuan pada Materi Gen
Authors: Azhari Nabilah Syahirah , Simangunsong Habibah Hanun , Hrp Izra Aulia Almi , Afdilani Nurhani Afdilani , Tanjung Indayana Febriani 
Published: March 2023

ABSTRACTIn the implementation of education, a student must be able to master the class and educate students to change, especially mastering learning. However, not a few teachers are indifferent to the way of teaching and the results obtained by their students. Educators generally use methods that make students often feel bored so that the subject matter is easily forgotten so that this can affect the learning outcomes of a student. The purpose of this research activity is to determine the effectiveness of the project-based learning model in improving the learning outcomes of class XII IPA 1 SMA N 2 Percut Sei Tuan on gene material. The method used is experimental research with the research population of students of SMA N 2 Percut Sei Tuan and the research sample is 40 students of class XII IPA 1. The results of individual learning mastery on gene material are seen as indicators of success. In the first cycle, the first meeting obtained individual learning completeness of 32.5%, then the second meeting was 65%. In the second cycle, the third meeting was 75%, then the fourth meeting was 85% with a score of 75. The results of the research prove that student learning outcomes can be increased effectively by applying the Project Based Learning model.Keywords: Gene, Implementation, Learning Outcomes, Project Based Learning.ABSTRAK Dalam pelaksanaan Pendidikan seorang tenaga didik tentu harus mampu menguasai kelas dan mendidik para peserta didik untuk berubah terutama menguasai pembelajaran. Namun, tidak sedikit guru yang acuh tak acuh terhadap cara mengajar dan hasil yang diperoleh oleh peserta didik nya. Pendidik umumnya memakai metode yang membuat peserta didik kerap merasakan jenuh sehingga materi pelajaran mudah dilupakan begitu saja sehingga ini dapat mempengaruhi hasil belajar seorang peserta didik. Tujuan dari kegiatan penelitian ini untuk mengetahui efektivitas model pembelajaran project based learning dalam meningkatkan hasil belajar dari siswa kelas XII IPA 1 SMA N 2 Percut Sei Tuan pada materi gen. Metode yang digunakan adalah penelitian eksperimen dengan populasi penelitian siswa SMA N 2 Percut Sei Tuan dan sampel penelitian yaitu siswa kelas XII IPA 1 sebanyak 40 orang. Hasil ketuntasan belajar individual pada materi gen dilihat sebagai indikator keberhasilan. Pada siklus I pertemuan ke-1 memperoleh ketuntasan belajar individual sebesar 32,5%, kemudian pertemuan ke-2 sebesar 65%. Pada siklus II pertemuan ke-3 sebesar 75%, kemudian pertemuan ke-4 sebesar 85% dengan nilai ≥ 75. Hasil penelitian membuktikan bahwa hasil belajar siswa dapat meningkat secara efektif dengan penerapan model pembelajaran Project Based Learning.Kata Kunci: Gen, Hasil belajar, Penerapan, Project Based Learning.
Metal Returns, Stock Returns and Stock Market Volatility
Authors: Zevallos Mauricio , Carpio Carlos del 
Published: March 2023

Given the extensive participation of mining stocks in the Peruvian stock market, the Lima Stock Exchange (BVL) provides an ideal setting for exploring both the impact of metal returns on mining stock returns and stock market volatility, and the comovements between mining stock returns and metal returns. This research is a first attempt to explore these issues using international metal prices and the prices of the most important mining stocks on the BVL and the IGBVL index. To achieve this, we use univariate GARCH models to model individual volatilities, and the Exponentially Weighted Moving Average (EWMA) method and multivariate GARCH models with time-varying correlations to model comovements in returns. We found that Peruvian mining stock volatilities mimic the behavior of metal volatilities and that there are important correlation levels between metals and mining stock returns. In addition, we found time-varying correlations with distinctive behavior in different periods, with rises potentially related to international and local historical events.
Productividad total de factores en la agricultura peruana: estimación y determinantes
Authors: Galarza Francisco B. , Díaz J. Guillermo 
Published: March 2023

En este artículo, proponemos la estimación de la productividad agrícola usando datos micro-económicos para el Perú. El método consiste en la estimación de una función de producción agraria, que permite recuperar la productividad como un residuo, y constituye una aplicación directa de desarrollos metodológicos recientes en la estimación de funciones de producción con datos de panel (e.g., Gandhi et al., 2013), pero aplicado en este artículo a datos de sección cru- zada. Debido a la menor información disponible para la estimación con respecto al caso de datos de panel, recurrimos a supuestos de formas funcionales. En particular, se escoge la función de elasticidad de sustitución constante, que permite una mayor flexibilidad que otras formas usadas previamente en la literatura empírica nacional, como la Cobb-Douglas. Encontramos que no hay sustento para la hipótesis de la existencia de retornos crecientes a escala; que la productividad está positivamente correlacionada con la edad, el sexo, y la educación; y negativamente relacionadacon el tamaño de la unidad agropecuaria y el poder de mercado.
UAV-LiDAR-based 3D Mapping of Apple Orchards and Automatic Georeferencing of Segmented Apple Tree Locations
Authors: Soki Nishiwaki , Emaru Takanori 
Published: March 2023

In this paper, we propose a system to create high-precision maps using UAV-LiDAR and to determine the location of individual fruit trees (apple trees) on the maps.
The system is based on a UAV-LiDAR system that flies over an actual orchard. A UAV was flown over an actual orchard, and the point cloud of the onboard LiDAR and the location information of RTK-GNSS were obtained. The system records the LiDAR point cloud and RTK-GNSS position information. Automated software processes point cloud data offline and Automated software processes point cloud data offline and automatically segments each apple tree in the map. The RTK-GNSS position information is used for the segmented trees. The positional information obtained from RTK-GNSS was georeferenced to the segmented trees without using ground evaluation points. As a sample, location information was obtained from trees using the Quasi-Zenith Satellite System (QZSS) MICHIBIKI. The positional accuracy of the trees was evaluated using the positional information obtained from the Quasi-Zenith Satellite System MICHIBIKI as a reference. As a result, the alignment accuracy was sufficient to identify individual fruit trees.
Pengaruh Model Pembelajaran Kooperatif Tipe Investigasi Kelompok Terhadap Kemampuan Komunikasi Matematis Siswa SMPIT Insan Madani 8
Authors: Rhaudiya Azahra Salsabila , Ambarwati Lukita , Abdul Aziz Tian 
Published: March 2023

Penelitian ini bertujuan untuk menguji pengaruh penerapan model pembelajaran kooperatif tipe investigasi kelompok terhadap kemampuan komunikasi matematis siswa SMPIT Insan Madani 8. Metode penelitian yang digunakan yaitu quasi eksperimen dengan posttest-only control group design. Populasi dalam penelitian ini yaitu seluruh peserta didik kelas VIII di SMPIT Insan Madani 8. Teknik pengambilan sampel Cluster Random Sampling. Kelas yang dijadikan sampel adalah kelas VIII-2 sebagai kelas eksperimen dan kelas VIII-3 sebagai kelas kontrol. Instrumen yang digunakan berupa posttest kemampuan komunikasi matematis pada materi pola bilangan yang telah diuji validitas dan reliabilitasnya. Berdasarkan hasil analisis data, digunakan Uji-t’ dua sampel independen dengan taraf signifikan 5% diperoleh rata-rata hasil tes kemampuan komunikasi matematis siswa kelas eksperimen lebih tinggi dibandingkan dengan kelas kontrol. Hal ini mengakibatkan bahwa model pembelajaran kooperatif tipe investigasi kelompok memiliki pengaruh terhadap kemampuan komunikasi matematis siswa di SMPIT Insan Madani 8 pada materi pola bilangan. Adapun uji cohen’s d diperoleh nilai d = 0,7 dengan presentase 76% yang menyimpulkan besar pengaruh sedang.
Tensiones en una prótesis parcial fija unitaria implantosoportada en primer premolar inferior con diferentes materiales mediante elementos finitos
Authors: Méndez A. , Coronado H. 
Published: March 2023

Objetivo: Analizar las tensiones en prótesis parciales fijas unitarias implantosoportadas de metalporcelana, zirconio y disilicato de litio en primer premolar inferior a través del análisis de elementos finitos ante una fuerza de 500 N. Materiales y métodos: Se realizaron tres modelos de estudio, corona implantosoportada de metalporcelana, de disilicato de litio y de zirconio en primer premolar inferior; el implante dental fue de titanio grado V, basado en el modelo Bolt® de UniDentalDirect con conexión interna tipo ranurado (18 estrías) y una medida de 11,0 x 4,5 mm, pilar preformado y tornillo integrado. Los tres diseños tuvieron aplicación de fuerza vertical y oblicua (45°) de 500 N. Se realizó el modelado geométrico con el programa SolidWorks® 2017 y se obtuvieron resultados mediante el análisis de Von Mises a través del programa CosmoWorks®2017. Resultados: El menor valor de máxima tensión a nivel coronal ante fuerzas verticales y oblicuas se encontró en la corona de disilicato de litio, con 21,9 Mpa y 33,2 Mpa, lo que significa una diferencia mínima respecto de la corona de zirconio, que presentó 22,1 Mpa y 35,1 Mpa. A nivel del pilar, la corona de zirconio tuvo el menor valor de máxima tensión, con 18,6 Mpa y 28,1 Mpa. A nivel del tornillo, no hubo diferencias significativas. Conclusiones: Las coronas de metalporcelana, disilicato de litio y zirconio demostraron ser materiales de buena resistencia ante la compresión y tracción, pero en el diseño de la corona de zirconio se generó una tensión general más baja.
Heating Up in Icy Waters
Authors: Wright Blake 
Published: March 2023

It was an area once thought to be the last untapped jewel in the hunt for hydrocarbons in the Great White North—a frontier of equal parts promise and peril. The lure of massive oil deposits lurking miles below its icy waters had operators taking a hard look at offshore Eastern Canada as far back as the late 1960s; however initial production from the area—Cohasset-Panuke off Nova Scotia—did not begin until 1992. Logistical challenges related to the remote area and the lack of existing infrastructure made bringing on new production in the region an expensive proposition. The discovered fields would need to be sizable to warrant the required investment.
After decades of fits and starts, offshore Eastern Canada has yielded just a handful of major developments, with the best of those facing their own sets of challenges. Newfoundland and Labrador’s Terra Nova, the first development in North America to use floating production, storage, and offloading (FPSO) technology in a harsh-weather environment featuring sea ice and icebergs, came on line in 2002, but has been suspended for the past 3 years due to issues with the vessel.
White Rose, another FPSO-based development, came on stream in late 2005 via subsea wells tied back to the SeaRose vessel. After successful completion of one expansion project in the 2010s, a further expansion—West White Rose—was planned but halted in 2020 due to unfavorable oil markets caused by the COVID-19 pandemic.
The project envisaged a wellhead platform supported by a concrete gravity structure (CGS) and topsides. The platform will produce back to the SeaRose FPSO. Cenovus approved the restart of the project in May 2022. The West White Rose project is expected to increase the production life of the field by 14 years.
Newfoundland and Labrador’s landmark oil production platform Hibernia became the first to produce oil in the province just over 25 years ago. As of August 2022, the project has produced more than 1.2 billion bbl of oil from the field, with almost 580 million bbl remaining proven and possible reserves.
The region’s newest producer is the ExxonMobil-operated Hebron. First oil from the field was produced in November 2017—37 years after the field’s discovery by former operator Chevron. Plans to develop the field were shelved in the early 2000s only to be revived later in the decade.
As a result of production interruptions and project delays, overall production trends in the region have been on the decline since the end of 2019 (Fig. 1).
Off Nova Scotia, both ExxonMobil’s Sable Offshore Energy Project and Ovintiv’s (formerly Encana) Deep Panuke produced commercially for a combined 24 years (19 and 5, respectively) before each was abandoned and decommissioned in 2018.
However, the outlook for offshore Eastern Canada today is somewhat brighter.
Louisiana Carbon Storage Projects Surging on Fatter Tax Breaks and Blue Fuel Visions
Authors: Rassenfoss Stephen 
Published: March 2023

Louisiana’s energy companies are racing in a new direction chasing rich tax credits and hopes for blue fuels.
An economy built on producing oil and gas and turning them into fuels and chemicals is now the leader, by far, in projects to capture and store carbon dioxide emitted by the massive petrochemical and refining facilities along the Mississippi River.
Out of 28 applications for CO2 injection projects in the US, 15 are in Louisiana, said Steve Lee, director of the injection and mining division of the Louisiana Department of Natural Resources, during a recent presentation at the CO2 Conference in Midland, Texas.
If all those permit requests lead to operating projects, they would increase the current number of sites globally by 50%, according to an annual survey by the Global Carbon Capture and Storage (CCS) Institute, which supports the growth of storage.
The trigger for this uptick was the 2022 US Inflation Reduction Act that includes large increases in the tax credits—which can be paid in cash for up to 5 years to companies that reduce their emissions by capturing CO2 and then injecting it into subsurface storage.
In Louisiana, the key number in the bill is the top rate paid for injecting CO2 into sites designed to store it permanently—$85 per metric ton for facilities that begin construction prior to 1 January 2033.
For owners of chemical plants, this can go a long way toward paying the high cost of carbon-reducing projects required by investors and lenders, and it opens the door for them to get into the business of selling low-carbon blue fuels.
Louisiana, with its vast supplies of CO2 that can be separated out at an affordable cost and vast stores of open pore space in the ground, is a test bed for this hydrocarbon-based energy transition.
“Our geology is really good in Louisiana. Also, we have an extensive pipeline network and lots of CO2. Half of our CO2 is from industrial emissions, so it is good for capture,” Lee said.
Connecting those resources to create a CO2 storage business also requires large numbers of skilled deal makers, engineers, lawyers, and politicians because what they are building is neither simple nor an easy sell.
A recent deal, described in corporate releases, helps show the complexities and motivations required to capture, deliver, and store industrial CO2.
It starts at the world’s biggest ammonia-producing facilities in Donaldson, Louisiana, owned by CF Industries. The company wants to rid itself of the title of the state’s largest CO2 emitter with a plan to invest $200 million in a unit that will pull CO2 out of its exhaust streams, remove the water, and compress the gas to its supercritical state for shipment.
Technology Focus: Well Testing (February 2023)
Authors: Gagnon Jeffrey 
Published: March 2023

The energy transition is in a continuous pursuit of innovative technology applications from all corners of the oil and gas industry. With the exponential growth of carbon capture and sequestration (CCS) projects, similar subsurface appraisal objectives remain. Derisking dynamic reservoir performance and characterizing storage pore space are key enablers for prospective CCS projects.
The mention of well testing often takes readers to a visualization of hydrocarbon disposition by a flare. Once a bright and vibrant spectacle of our industry’s exploration updates, the days of flaunting a chairman’s flow or banker’s burn are past. Waning application of well testing during our energy transition is a specious assumption, and it’s the optics that are transforming as the well testing discipline proves its value to long-term carbon storage projects.
Injecting CO2 into the subsurface is hardly a new concept; operators have been doing this for decades as part of enhanced oil recovery. However, the application of injecting CO2 is changing in response to operators’ environmental, social, and governance ambitions. While carbon storage concepts exist in many forms, anchoring a storage project requires pore space of adequate quantity and quality in proximity to a fixed source of emissions. Carbon storage projects also must manage additional risks such as sustained injectivity performance, geologic seal integrity, and plume migration, to name a few.
Enter well testing. Quantifying injection performance of supercritical fluids is crucial for optimizing wells to meet project needs while minimizing the number of required penetrations through a structural seal. Whether for a saline aquifer or a previously depleted field, pressure transient analysis enhances understanding of the pore space intended for storage and the potential heterogeneities within. Furthermore, integrating well testing with other reservoir-description tools may be used to monitor migration of stored fluids within the reservoir.
With corporate and regulatory targets driving the unprecedented pace and scale of CCS opportunities, well testing is quickly reaffirming itself as a powerful tool in characterizing pore space essential to our lower-carbon goals.
This month’s papers highlight ongoing developments within the well testing discipline and important reminders about how to properly use dynamic data. The application of these well testing fundamentals to a nascent carbon storage market is still evolving.
Recommended additional reading at OnePetro: www.onepetro.org.
SPE 208967 Rate-Pseudopressure Deconvolution Enhances Rate-Time Models Production History-Matches and Forecasts of Shale Gas Wells by L.M. Ruiz Maraggi, The University of Texas at Austin, et al.
URTeC 3705570 Analysis of Multiple Flow/Buildup Tests Including a 5-year Buildup: Case Study of an Australian Shale Gas Well by Christopher R. Clarkson, University of Calgary, et al.
OTC 31691 Challenges and Mitigation Strategies for High-Rate Gas Well Testing in High-Pressure/High-Temperature DST Operation by Jakpakorn Hemaprasertsuk, PTTEP, et al.
Pathways to clean energy transition in Indonesia's electricity sector with OSeMOSYS modelling (Open-Source Energy Modelling System)
Authors: Paiboonsin Pusanisa , Oluleye Gbemi , Yeganyan Rudolf , Tan Naomi , Cannone Carla , Howells Mark 
Published: March 2023

Abstract
Responding to the Paris agreement and climate change mitigation, Indonesia aims to reach Net Zero by 2060 or sooner. Due to Indonesia's dependence on coal and growing consumption, alternative sources of clean energy are imperative for meeting its rising energy needs and reducing energy-related greenhouse gas emissions to achieve the energy transition. This project aims to examine Indonesia's challenges, opportunities and potential to achieve low carbon ambition in the energy sector and identify alternative pathways for the energy transition in Indonesia. Cost-effective scenarios are developed by the Open Source Energy Modelling System (OSeMOSYS), providing comprehensive data analysis. OSeMOSYS is a least-cost model that enables long-term energy system modelling and its related intensive analysis. Indonesia energy data and OSeMOSYS input are obtained from an Indonesia starter data kit. In this study, a comparison of electricity generation, technology, investment, and carbon dioxide emissions is made between business-as-usual scenarios and model scenarios. The results show that NZ50 scenario is more cost-effective than others in meeting Indonesia's future energy demand at the lowest implementation cost. Although NZ50 and NZ60 are possible ways to reach carbon neutrality, NZ50 emits fewer CO2 emissions at a similar cost to NZ60. This paper's insights emphasise that large-scale renewable energy deployment and coal retirement are critical pathways to reaching carbon neutrality and achieving the energy mix transition.