bluuebunny/crossref_metadata_2025_split huggingface dataset:
Prevalencia de cáncer de piel en pacientes de 18 a 50 años en el Hospital Teodoro Maldonado Carbo durante el periodo 2014 -2019.
Authors: Cerón Chimarro Doménica Eglee , Ayon Genkuong Andrés Mauricio 
Published: August 2021

Resumen
Introducción: El cáncer de piel consta como una de las neoplasias más frecuentes y el número de casos ha aumentado significativamente a través de los años, la OMS indica que en las últimas dos décadas la incidencia del cáncer de piel aumentó en un 300%. Es más frecuente en pacientes mayores de 50 años, sin embargo, en los últimos años han aumentado los casos en pacientes jóvenes y hay escasos estudios epidemiológicos al respecto, por lo que en este trabajo se busca encontrar la prevalencia del cáncer de piel en pacientes de 18 a 50 años.
Métodos: Se realizó un estudio de prevalencia, retrospectivo, observacional y descriptivo, utilizando las historias clínicas registradas en el AS400 del Hospital de Especialidades Teodoro Maldonado Carbo durante el periodo 2014 – 2019. El estudio contó con una población de 105 pacientes que tienen de 18 a 50 años.
Resultados: Se obtuvo una muestra de 51 pacientes donde la media de edad fue de 40,94 años con un predominio del sexo femenino (79,47 %) en comparación con el sexo masculino (23,53 %). El tipo de cáncer más frecuente fue el basocelular (54,90 %), seguido del melanoma (27,45 %) y el espinocelular (7,84 %). Con respecto a los factores de riesgo y comorbilidades, se encontró que la mayoría no los tiene; 80.4% sin factores de riesgo y 90,20 % sin comorbilidades.
Conclusión: La edad media fue de 40.94 años. El tipo de cáncer de piel más frecuente fue el basocelular y el sexo predominante fue el femenino. No se encontraron factores de riesgos ni comorbilidades de importancia en este estudio.
The Influence of Satisfaction on Quality Dimensions Services Financing Mudharabah to Customers Loyalty of Shariah Bank
Authors: Iskandar Romi , Afriyenis Winda , Pratiwi Nila , Rahma Anita Ade 
Published: August 2021

This research aims to understand the influence of satisfaction on the quality of services financing
Mudharabah to loyalty the customers about the manner of Shariah bank. The Population of this research is
customers of Mudharabah financing of Shariah bank in the Padang city, West Sumatera, Indonesia with the
sample is 126 people. Data analysis technique uses statistics descriptive the frequency and the path analysis.
The results show that 5 external variables namely satisfaction on the quality of services tangible dimension
empathy, reliability, responsiveness, assurance influential significantly to loyalty to the bank customers
shariah in the Padang city. Contributing on each satisfaction on the quality of services tangible dimension
(11.81 %), empathy (15.55 %), reliability (23.48 %), responsiveness (22.60 %), and assurance (21.22 %)
were recommended to bank about the manner of shariah bank in the city the Padang. They helps to raise and
improving the quality of services financing Mudharabah particularly regarding to the from the parking lot,
the number of ATM machine, concern at a venture customers, the accuracy of the schedule of distribution
financing, order and long a queue, smooth bank-in and cash withdrawal, speed service and facilities for
customers in conveyed any complaints to bank about the manner of Shariah bank.
The Influence of Ethnic, Gender, and Qualification of Directors on Company Performance
Authors: Ananda Rifki Putra , Ilona Desi , Rahma Anita Ade 
Published: August 2021

This study aims to determine the effect of ethnic, gender and qualification of the board of directors on company performance. Two control variable are quality audit and company age. The sample in this study was taken random at the companies listing on the Indonesia Stock Exchange, which were 266 companies with a study period of 7 years from 2011-2017. Data analysis by used panel data regression. The results of this study indicate that gender has a negative and significant effect on company performance, while ethnic and qualification have no significant effect on company performance. Quality audit and company age have no significant effect on company performance.
DRAINASE VERTIKAL DENGAN KOLOM CAMPURAN PASIR-PECAHAN BETON UNTUK MEMPERCEPAT KONSOLIDASI TANAH LEMPUNG
Authors: Listyawan Anto Budi , Wiqoyah Qunik , Sugiyatno  , M. Alaydrus Guntur Pamungkas4  
Published: August 2021

Tanah di Desa Troketon, Kecamatan Pedan, Kabupaten Klaten mempunyai nilai PI sebesar 34,59%; LL 62,55%; PL 27,96%; dan SL 19.62% ditinjau dengan metode USCS (United Soil Clasification System) termasuk ke dalam kelompok golongan CH yaitu lempung anorganik berplastisitas tinggi. Tanah lempung yang buruk dapat mengakibatkan rusaknya bangunan di atasnya seperti jalan yang bergelombang. Tanah lempung yang buruk dapat diperbaiki menggunakan drainase vertikal yang bertujuan untuk mempercepat penurunan sehingga waktu yang dihabiskan untuk pembangunan relatif singkat dan tidak memakan biaya yang berlebih. Pada penelitian drainase vertikal ini digunakan kolom campuran pasir dan pecahan beton dengan variasi susunan kolom pola bujur sangkar dan segitiga. Sampel diambil pada titik tengah antar 4 kolom , 3 kolom dan 2 kolom, kemudian dilakukan pengujian konsolidasi. Pada variasi bujur sangkar titik tengah antar 4 kolom didapatkan nilai CV sebesar 0,000187 cm2/s, CC sebesar 0.429 dan SC sebesar 0.173 sedangkan, titik tengah antar 2 kolom mempunyai CV sebesar 0,000163 cm2/s, CC sebesar 0.490 dan SC sebesar 0.176. Pada variasi segitiga titik tengah antar 3 kolom didapatkan nilai CV sebesar 0.000129 cm2/s, CC sebesar 0.541 dan SC sebesar 0.254 sedangkan, titik tengah antar 2 kolom mempunya nilai CV sebesar 0.000114 cm2/s, CC sebesar 0.561 dan SC sebesar 0.258. Sehingga kolom campuran pasir dan pecahan beton dengan variasi bujur sangkar lebih baik untuk digunakan sebagai drainase vertikal.
ANALISIS POLA PERSEBARAN DESA DI KECAMATAN KUANTAN MUDIK KABUPATEN KUANTAN SINGINGI PROVINSI RIAU
Authors: Ruspianda Riki , Asmeri Jafra Ria 
Published: August 2021

Pola persebaran desa adalah pola keruangan yang terdapat pada setiap desa. Kecamatan Kuantan Mudik merupakan kecamatan di Kabupaten Kuantan Singingi yang memiliki desa terbanyak diantara kecamatan lain. di Kecamatan Kuantan Mudik, Pola pesebaran desa yang belum teridentifikasi. Hal ini memberikan masalah dalam proses pembangunan. Bentuk dari permasalahan tersebut berupa tidak optimalnya pemanfataan segala potensi pada wilayah desa di Kecamatan Kuantan Mudik. Penelitian ini menggunakan metode deskriptip kualitatif menemukan hasil bahwa pola persebaran desa di Kecamatan Kuantan Mudik berbentuk linear dengan mengikuti jalan dan sungai. Sedangkan potensi desa di Kecamatan Kuantan Mudik terdiri dari potensi fisis dan nonfisis. Potensi fisis yang ada pada desa di Kecamatan Kuantan Mudik meliputi potensi fisis lahan dan tanah, air, iklim, ternak dan sumberdaya manusia. Sedangkan potensi nonfisis terdiri dari adanya pola hidup masyarakat yang menganut sistem gotong royong, adanya lembaga-lembaga sosial yang mendukung kehidupan masyarakat dan adanya pamong desa yang ada disetiap desa untuk kelancaran pemerintahan desa di Kecamatan Kuantan Mudik.
Tieion Akropolisi
Authors: Yıldırım Şahin 
Published: August 2021

Tieion antik kenti, Karadeniz kıyısının batı kesiminde, Kimi antik çağ yazarları tarafından Bithynia ile Paphlagonia arasında sınır olarak kabul edilen Billaos nehrinin (Filyos) hemen yakınında yer almaktadır. Yerleşim, antik ve modern kaynaklar tarafından MÖ 7. yüzyılın ikinci yarısında, Tios adında Miletoslu bir rahibin önderliğinde kurulmuş bir Miletos kolonisi olarak nitelendirilmektedir. Tieion Akropolisinde kazılar sonucunda ortaya çıkarılan MÖ 7. ve 6. yüzyıllara tarihlendirilen İonia seramikleri, yerleşimin Miletos tarafından kurulduğunu doğrulamaktadır. Bununla birlikte önemli bir liman kenti olan Tieion, Karadeniz’in ticaret yolları üzerinde, balıkçılık, şarap üretimi ve tahıl yetiştiriciliğinin ön plana çıktığı bir yerdi. Antik limanın mendirekleri, akropolisteki tapınağı, hamamları, su kemerleri ve tiyatrosuyla Tieion, tipik bir Roma kenti görünümündedir.
Yukarı şehir çevresinde son yıllarda yürütülen kazı çalışmalarında kentin kuruluş dönemlerine ait yapı kalıntılarına rastlanmıştır. Bu yapılar dikdörtgen ya da yuvarlak şekilde açılmış bir çukurun içinde iptidai şekilde inşa edilmiş konutlardan oluşmaktadır. Bu konutların içlerinde ve çevrelerinde yapılan çalışmalarda, MÖ 7. yüzyılın son çeyreğine tarihlendirilen, Miletos yapımı Orta Yaban Keçisi II evresi olarak tanımlanan seramik parçaları bulunmuştur. Bu seramik gurubu ile aynı tabakalarda yerel olarak üretilmiş Phryg menşeili koyu gri, siyah ve kahverengi astarlı seramikler de ortaya çıkarılmıştır. Akropoldeki P1 konutunda ise Grek Koloni Çağı tabakalarının hemen altında, olasılıkla Attika Geç Geometrik Dönemi’ne tarihlendirilen pişmiş toprak bir at heykelciği parçası ile karşılaşılmıştır. Bir diğer at figürini parçası da aynı konutta başka bir lokasyonda bulunmuştur ancak, bu ikinci örnek gerek kil yapısı gerekse de stil bakımından yerel üretim olarak değerlendirilmiştir. Ayrıca bu figürinlerle birlikte çok sayıda yerel imalat çanak çömlek de ortaya çıkarılmıştır. Böylece, Güney Karadeniz’de Grek Koloni Çağı ve Koloni Çağı öncesine dair somut kanıtlar ilk defa elde edilmiştir.
Introduction
Authors: Grajales Jacobo , Vadot Guillaume 
Published: August 2021

Vingt ans après le début du boom des commodities , qu’en est-il des formes d’autorité politique qui prévalent dans les espaces dédiés à l’extraction des matières premières et souvent présentés comme les nouvelles frontières du capitalisme ? En prenant pour terrains d’enquêtes des sites miniers, pétroliers, métallurgiques et agro-industriels ainsi que les entreprises qui les exploitent, les contributions rassemblées dans ce dossier témoignent toutes des complications que subit, au local, le projet de cantonnement de l’État dans un rôle de courtier pour les investisseurs. La présente introduction se propose de revenir sur les processus qui produisent, le plus souvent à leur corps défendant, ces ancrages politiques et sociaux des entreprises extractives. Le recul historique dont on dispose depuis la grande vague de privatisations et de libéralisation économique de la fin des années 1990 permet désormais d’observer ces nouveaux espaces extractifs dans la durée et dans leur quotidienneté. Au vu de la résurgence de mécanismes de représentation et de formes d’autorité qui, nourries souvent par des mobilisations locales contestataires, échappent aux entreprises et parviennent même souvent à s’emparer d’un certain degré d’étaticité, il nous apparaît manifeste que ces dernières ne sont pas les enclaves extractives qu’un certain imaginaire du capitalisme contemporain continue à postuler. Au contraire, ces processus incrémentaux tendent à en faire des parties prenantes de territoires politiques négociés et qu’il s’agit de prendre au sérieux.
Comprehensive Approach to Tackle Systemic Failure in Gas Lift Valves in Pre Salt Wells
Authors: Real Elaine Daniele M P C , Silva Thiago Geraldo , Ciribelli Otavio Borges , Sanomya Tatiana 
Published: August 2021

Abstract
This work describes a comprehensive approach to tackle systemic failure in gas lift valves in pre-salt wells. Failure analyses in gas lift valves were performed after unexpected early failures leading to tubing-annulus communication. Understanding the root causes of this problem generates value for assets, increasing equipment life, preventing unnecessary workover, and reducing costs.
Suspect failed valves are systematically removed from the wells, usually by slick-line workovers, and brought to an onshore workshop, where their integrity and mechanical functionality can be analyzed. The valve's run life, equipment model and manufacturer, annular fluid, flow through the gas lift valve, operational pressure and temperature, composition of reservoir fluids and solids deposition were verified.
Besides, transient simulations were carried out to provide insights on the root causes of the failure. Also, a good understanding on how each valve works, including its engineering design, was necessary to thoroughly understand the failure process.
The study of gas-lift injection valves early failure in pre-salt wells have been an excellent way to understand the life cycle of production wells before the need to start lift gas injection. That leads to a comprehensive understanding about the effects of the fluids left in annulus and have supported Petrobras in most effectively managing of well integrity and workover costs.
The analysis incorporates the impact of oil production, water cut, completion type, annular fluid composition, anti-scaling fluid injection (composition and efficiency) and the differential pressure between the tubing of the annulus in the valve failure model. The composition of the deposit found inside the valves and the production history of the well were essential to assemble the puzzle of how the failure mechanism works. With the acquired knowledge, it has been possible to apply barriers to avoid future events of unwanted tubing-annulus communication arising from gas-lift valve failures.
This article provides a methodology and examples for a most effective understanding of the gas-lift valves failure mechanisms and their root causes, which proved to be a valuable tool for the artificial lift design and for the planning of well operations. That has contributed to maximize equipment life, cost reduction and, at last, generating value for the company.
Selecting a Product for Wax Remediation: From Characterization of Field Wax Deposits to Improvement of Treatment Sustainability
Authors: Aguiar Janaina I. S. , Pontifes Antonio A. , Rogers Jonathan , Mahmoudkhani Amir 
Published: August 2021

Abstract
Wax deposition is one of the known challenges of flow assurance management in upstream oil production and operations demanding continuous improvements and the search for more effective prevention and remediation methods. At the same time, there are no universally agreed upon test methods to evaluate the efficiency and mechanisms related to the chemical treatments. The objective of this paper is to present and debate different methods to evaluate the effectiveness of batch treatments for remediation of wax deposits and compare commonly applied solvents with fluids containing biosurfactants. One of the presented methods is a new test methodology that simulates dynamic and quasi-static flow regimes in production tubing and pipelines, as benchmarked methods, showed that the chemical treatments with biosurfactants, besides being a greener, sustainable option, were more efficient at dispersing wax deposits than the traditional solvent treatments.
A Case Study for Graded Material Development
Authors: Chen Wei , Cachinhasky Alexandre , Yates Chad , Anisimov Mikhail , Speights John , Overstreet James , Avagliano Aaron 
Published: August 2021

Abstract
Tungsten carbide hardfacing offers superior wear resistance in a wide range of oil and gas applications. However, for designs of complex geometries, trade-offs often need to be made between manufacturing robustness and service lifecycle based on limited choices of conventional deposition processes. An additive manufacturing (AM) functionally graded tungsten carbide using laser directed energy deposition (L-DED) is developed in an integrated numerically controlled multi-axis machining center with multi-material feeding capability. Essential process parameters are optimized using design of experiment (DOE). Graded structure is shown to reduce crack density. Erosion performance of the L-DED tungsten carbide is on par with commercial high velocity air fueled (HVAF) tungsten carbide coating. The study demonstrates that L-DED-based graded material strategy can significantly improve the robustness of the fabrication process and the expected service reliability. It opens up opportunities involving other hard materials, transition materials, grading strategy by thickness and/or by location.
A Novel Subsea Actuator to Electrify Small-Bore Valve
Authors: Orth Alexandre , Hendrix Gottfried , Kubacki Markus , Duarte da Silva Pedro Joao , De Negri Juliano Victor 
Published: August 2021

Abstract
This paper presents the development and qualification of a novel Subsea Electric Actuator, especially designed for rotary small-bore valves. One of the main challenges was to design an electric actuator which is as compact as the existing hydraulic actuators, but able to provide a fail-safe mechanism by field-proven springs and full integration of all necessary components, including the electric drive and controls, inside of a compact enclosure. Furthermore, the design team had to considerably reduce its power consumption and weight in comparison to existing solutions. Finally, the system was designed for lean manufacturing, allowing considerable cost-saving benefits for all the partners due to extensive standardization work. The paper shows the engineering requirements obtained by interviewing different users, the design methodology applied and the qualification of the new system up to TRL 3 with Digital Twin and Rapid Prototyping. Finally, an outlook is presented with the planned TRL 4 and TRL 5 qualification tests and a summary of the technical and economic benefits for the users of this novel Subsea Valve Actuator.
Machine Learning Prediction of Formation Evaluation Logs in the Gulf of Mexico
Authors: LeCompte Brian , Majekodunmi Tosin , Staines Mike , Taylor Gareth , Zhang Barry , Evans Randy , Chang Nathan 
Published: August 2021

Abstract
The objective of the paper is to describe the application of artificial intelligence software to predict formation evaluation logs (compressional sonic, shear sonic and density) using only gamma ray, and resistivity log data and drilling dynamics data as received by the electronic drilling recorder (EDR). The software was applied real-time as a well was being drilled in deepwater Gulf of Mexico.
Thorough examination and conditioning of EDR and wireline data give way to a training model construction for the artificial neural network (ANN) using full suites of log-data in offset wells. Next, a neural network architecture and associated hyperparameters are chosen and tested. The fully trained and validated model is applied to the gamma ray, resistivity and EDR of the target well while drilling. Real-time EDR and wireline data flow via WITSML from rig to cloud and data is delivered to the client. The results of the study indicate the simulated log data were comparable to those measured from conventional logging tools over the study area. In both blind well tests the density agreed with the conventional log results within 1.1 % and the compressional within 2.51 % (Figure 1). Each of these is well within the range of variance expected of repeat runs of a conventional logging tool. A primary driver for near real-time logs was to confirm structural depth of the target sands along the well bore. There was a depleted sand below the expected TD of the well that, if encountered, could have led to total losses and possible loss of the wellbore. It was critical to have real-time logs to characterize the sands above the depleted sand, using every possible petrophysical and geologic character to refine the log correlation. This integration of all the logs provided the best interpretation of the sand quality and led toward the completion decision. AI-based logs are a highly cost-effective alternative to LWD logging. It presents an environmentally friendly approach as there is no logging personnel on-site and no expensive and potentially dangerous nuclear sources in the hole
The deployment of this patented, machine learning-driven, real-time simulation of formation evaluation logs is unique in using only gamma ray, resistivity and drilling data. It is particularly useful in the overburden section where formation evaluation tools are often not run for cost reasons, in side-tracks, in HP/HT settings and operational risk mitigation. It provides additive data for other petrophysical/QI/rock property analyses including seismic inversion, shale content, porosity, log QC/editing, real-time LWD, drilling optimization, etc.
3D Stress Field Modeling for Wellbore Stability Analysis
Authors: Li Shaoxuan , Liu Lei , Han Zhilei , Wu Rui , Guo Naichuan 
Published: August 2021

Abstract
Borehole collapse is one of the difficult problems in offshore oilfield drilling, which is directly related to regional geostress field. Seismic inversion is widely used to construct 3D stress field, and the accuracy of seismic inversion results depends heavily on the quality of seismic data. Therefore, in the development oilfield with poor seismic data quality, we use attribute modeling method to construct high-precision 3D geostress field to help analyze the wellbore stability of oilfield development wells. First, 3D structural model is created by using seismic interpretation horizon and fault. Then, the 3D stress body is constructed by filling the vertical and horizontal attributes according to certain constraints by using the known geostress values at the wellbore of the drilled development wells.
P oilfield is a large Neogene oilfield located in Bohai Bay. The serious expansion of the wellbore in the shallow unconsolidated sandstone in the oilfield area leads to high engineering risks. Moreover, due to the influence of large-scale gas cloud area, the effective wave energy on seismic profile is submerged. Through the above attribute modeling method, the high-precision 3D geostress field of P oilfield is successfully constructed. Practical application shows this method is suitable for the evaluation of geostress and wellbore stability analysis in areas with high well control in the middle and late stages of oilfield development. Especially in the area where the seismic data is not reliable enough, the 3D modeling results of this method has higher accuracy than the seismic inversion results.