bluuebunny/crossref_metadata_2025_split huggingface dataset:
A New Efficient Adaptive Control of Torsional Vibrations Induced by Switched Nonlinear Disturbances
Authors: Wasilewski Maciej , Pisarski Dominik , Konowrocki Robert , Bajer Czesław I. 
Published: July 2019

Abstract
Torsional vibrations induced in drilling systems are detrimental to the condition of the machine and to the effectiveness of the engineering process. The cause of vibrations is a nonlinear and unknown friction between a drill string and the environment, containing jumps in its characteristics. Nonlinear behaviour of the friction coefficient results in self-excited vibration and causes undesirable stick-slip oscillations. The aim of this paper is to present a novel adaptive technique of controlling vibrating systems. The scheme is based on the linear quadratic regulator and uses direct measurements of the friction torque to synthesize its linear dynamic approximation. This approach allows generating a control law that takes into account the impact of the friction on the system dynamics and optimally steers the system to the desired trajectory. The controller’s performance is examined via numerical simulations of the stabilization of the drilling system. The proposed solution outperforms the comparative LQG regulator in terms of the minimization of the assumed cost functional and the overall stability of the control system under the nonlinear disturbance.
Frequency Response Based Curve Fitting Approximation of Fractional–Order PID Controllers
Authors: Bingi Kishore , Ibrahim Rosdiazli , Karsiti Mohd Noh , Hassam Sabo Miya , Harindran Vivekananda Rajah 
Published: July 2019

Abstract
Fractional-order PID (FOPID) controllers have been used extensively in many control applications to achieve robust control performance. To implement these controllers, curve fitting approximation techniques are widely employed to obtain integer-order approximation of FOPID. The most popular and widely used approximation techniques include the Oustaloup, Matsuda and Cheraff approaches. However, these methods are unable to achieve the best approximation due to the limitation in the desired frequency range. Thus, this paper proposes a simple curve fitting based integer-order approximation method for a fractional-order integrator/differentiator using frequency response. The advantage of this technique is that it is simple and can fit the entire desired frequency range. Simulation results in the frequency domain show that the proposed approach produces better parameter approximation for the desired frequency range compared with the Oustaloup, refined Oustaloup and Matsuda techniques. Furthermore, time domain and stability analyses also validate the frequency domain results.
Analysis of the Use of Digital Technologies in Montenegro’s Tourist offer on the Example of a Hotels in Bar
Authors: Tomašević Ivana , Đurović Sandra , Abramović Nikola 
Published: July 2019

Abstract
This paper presents an analysis of the current state of the use of digital technologies by the categorized hotel accommodation providers in the Municipality of Bar. The concept of SMART tourism and the use of digital technologies in tourism implies networking of tourist content throughout the country towards getting “smart experience” from local community and creating “smart business ecosystem”. Hotels at the locations need to take advantage of new technologies and include various business, sociocultural, psychological and educational components. Following was analysed: the quality of the internet presence, the level of networking with the local tourist businesses, the use of logistic innovations in tourism and the intensity of the use of social networks. The goal was to identify the level of current digital recognition and the degree of use of information technologies to point out the unused potential for the development of entrepreneurship in the hotel industry.
PENGUNGKAPAN INFORMASI HUMAN CAPITAL DAN HARGA SAHAM: STUDI PADA HIGH INTELLECTUAL CAPITAL (IC) INTENSIVE INDUSTRIES DI BURSA EFEK INDONESIA
Authors: Sugianto Andreas , Rudiawarni Felizia Arni 
Published: July 2019

In the accounting’s world, human capital is a part of an intellectual capital (IC) in a group of intangible assets. Human capital began to be recognized as a key factor of a competitive advantage. Disclosure of information related to human capital also contribute to the reduction of asymmetric information between firms and their investors. This study aims to describe the relationship between human capital information disclosure and stock price. The object of this study are firms in the high Intellectual Capital (IC) intensive industry that disclose information about their human capital. This study finds that the disclosure of human capital has positive effect on stock prices, particularly the disclosure of information regarding the qualifications and competence of human capital. In other words, the information about human capital is value relevant.
Climatic changes of seasonal and inter-annual variability of the ice cover of the Greenland and Barents Seas
Authors: Timokhov L. A. , Vyazigina N. A. , Mironov E. U. , Yulin A. V. 
Published: July 2019

The structure of the long-period variability of the ice cover of the Barents and Greenland Seas over a long series of observations from 1930 to 2017 is analyzed. In both seas, there is a significant negative linear trend of ice cover for both the winter and summer seasons. Average for the period of 1950–2016 intra-annual changes in ice coverings demonstrate the conjugacy of the seasonal cycles of the Greenland and Barents Seas, but with certain differences. Three homogeneous groups with a similar character of intra-annual changes in the ice area are identified for each sea. Identified succession in a state of ice cover for 2 years.The conjugacy of changes in the average decadal values of sea ice cover in April and August with the average decadal indices of atmospheric circulation AO, AD, PNA, NAO and the index of the thermal state of the North Atlantic AMO is shown. Spectral analysis of the winter and summer ice cover of the Greenland and Barents Seas for the period 1930–2016 confirmed earlier received cyclical fluctuations of 22, 9–11 and 6–7 years.Cross-correlation analysis established a close relationship between the longitudinal changes in the ice cover and the average annual values of the following astrogeophysical parameters, the longitude coordinate of the Earth pole position Y, the Earth axis nutation indices dEps and dPsi, the Earth rotation speed index lod (length of day), Sun solar activity index (annual Wolf number) , the average for six months, the distance from the Sun to Earth in the summer SX-III and the winter SX-III periods. Significant correlation coefficients are quite large (R = |0,30| – |0,56|) for both seas, comparable to the correlation coefficients between the ice cover and average annual air temperature T, show the reality of the ice cover mediated reaction to changes in astrophysical factors. Statistical equations relating the sea ice cover to hydrometeorological and astrogeophysical factors were obtained by multiple correlation. The overall correlation coefficient varies from R = 0,80 to R = 0,87 AT. The Greenland Sea, the share of astrogeophysical factors in the long-term changes in the ice cover of both the winter and summer seasons exceeded the contribution of hydrometeorological factors by 3–4 times. In the Barents Sea, the contribution to the total dispersion of astrogeophysical factors in the winter period is somewhat less than that of hydrometeorological factors, and in the summer period they exceed only 1.4 times. The authors’ approach opens up the possibility of using it to obtain statistical equations for the diagnosis and forecast of long-term and climatic changes in sea-ice cover.
Future of peanut pest management: A plant pathologist's perspective.
Authors: Dufault N.S. , Paret M. , Small I. 
Published: July 2019

ABSTRACT
Integrated pest management (IPM) is a broad-based approach for pest control that has been used since the 1950s. This approach uses a variety of management tactics to keep pest levels below an economic threshold level. However, choosing the appropriate tactics in a timely manner can be difficult in many agricultural production systems. Technology is continually revolutionizing agricultural decision making by transforming large quantities of data into useful and timely information. The focus of this article will be on what makes a successful IPM strategy, and how novel technologies can possibly be incorporated. Pests impacting peanut production are continually adapting and evolving, thus the tools used to manage them must also have this capability. The future of pest management lies with finding ways to incorporate novel information into established IPM programs and adapting them for future changes in pest populations.
THE DESIGN OF THE TRAJECTORY OF A SPATIALLY DEVIATED WELL
Authors: Voievidko I. V. , Tokaruk V. V. 
Published: July 2019

Natural spatial deviation is due to the non-conformity of the type of a BHA and geotechnical drilling conditions at a certain interval, as well as mistakes in conducting geological exploration. The article presents the method which benefits the most from the natural deviation and the use of non-directional bottom hole assemblies. The main idea of this method lies in the fact that the design of the well trajectory is directed from the center of the target area to the wellhead. The article describes the main sections which constitute the trajectory of a spatially deviated well including the section of big diameter in the upper intervals. The input data necessary for designing the profile are given. The authors present the method of calculating the drilling lot using non-directional BHAs. The method consists of several cyclic repetitive operations and each subsequent interval of the wellbore is designed taking into account the change of the inclination and azimuthal angles in the previous interval. The authors conduct the survey of devices for drilling the borehole section which is made using a directional BHA. In rotor drilling, the technical devices and directional drilling technology are quite complex, therefore whipstocks with mud motors are used more often. As a result of calculating the trajectory of the well with different transition points between directional andnon-directional BHAs on the axis parallel to the azimuth direction, an array of transition points from two-axis to single-axis directional BHAs is formed. When drawing these points on the well plan, the ellipse of intermediate depths of BHA change is formed. This ellipse makes it possible to choose the optimal two-axis BHA using the necessary inclination angle values at the final stage of drilling a big diameter wellbore and using the final depth of this interval. On the basis of the this method the authors create software that allows automating the process of designing the well trajectory, taking into account the change of geology in the log, technical parameters of wells construction and technological parameters of drilling. This software was used while designing a well trajectory, referring to certain geological drilling conditions.
A Study of Surgical Cases During Earthquake Disaster in A Medical College
Authors: K.C Kanchan , Thapa Raj Kumar , Khadka Sanubhai , Paudel Damodar 
Published: July 2019

Introduction: An earthquake is an intense shaking of earth’s surface which is caused by movements in earth’s outermost layer. The earthquake of 25th April 2015, with a magnitude of 7.8 richter scale with its major aftershock on 12th May 2015 of 7.3 richter scale claimed around 8,962 lives across several districts of Nepal with 22,302 injuries. In this study we tried to figure out various surgical cases and the surgical procedures performed in a tertiary care hospital during an earthquake disaster.Methods: This study was a descriptive cross-sectional study of hospital data on all admitted surgical cases during an earthquake disaster. A total of 238 earthquake victims brought to emergency department of Kathmandu Medical College Teaching Hospital , a tertiary care center, from 26th April 2015 to 7th Jun 2015, for the period of 42 days were included. Those brought dead and discharged after primary treatments were excluded. Data obtained were entered and analysed in Microsoft Excel 2010.Results: Among 238 patients enrolled, 122 (51%) were male and 116 (49%) female with male to female ratio of 1.05:1. Age group (31-60 years) with an average age of 45 years were encountered most frequently 110 (46%) with the maximum number of patient burden from Sindhupalchowk district 80 (33.6%). Orthopedic surgery 185 (76%) appeared to be the most frequent followed by neurosurgery, plastic surgery, general surgery and dental surgery.Conclusions: In natural disaster like earthquakes, traumatic injuries are very common and thereby various surgical procedures especially ortho-plastic are the domain of treatment modalities. Disaster preparedness and combined surgical team effort needs to be focused to reduce both mortality and morbidity.
Keywords: disaster; earthquake; Nepal; surgery.
Prevalence of Cesarean Section and Its Indications in A Tertiary Care Hospital
Authors: Maskey Smrity , Bajracharya Manisha , Bhandari Sunita 
Published: July 2019

Introduction: Cesarean section is a surgical procedure performed to deliver fetus through abdominal route. Increasing rate of cesarean section worldwide is an alarming concern for public health and obstetricians due to increase in financial burden and risk to health of the mother in comparison to vaginal delivery. The aim of the study was to find the prevalence of cesarean section and its most common indication in a tertiary care hospital.
Methods: This descriptive cross-sectional study was done in a tertiary care hospital, from July 2016 to June 2018 after taking ethical clearance from institutional review board. Convenience sampling was done to reach the sample size. Data was collected and entry was done in microsoft excel, point estimate at 95% CI was calculated along with frequency and proportion for binary data and analysis was done.
Results: Out of total deliveries conducted, 862 (36.8%) were CS deliveries, 1477 (63.1%) were vaginal deliveries, and 12 (0.51%) were instrumental deliveries. Prevalence of CS is 862 (36.8%) at 95% CI (34.82%-38.78%). Mean age±S.D of delivering mother was found to be 26.1±0.25 years. Primi cesarean section was more than repeat cesarean section. Most common indication of cesarean section was fetal distress 243 (28%) followed by previous cesarean section 165 (18%), non-progress of labour 106 (12%), oligohydramnios 59 (7%), malpresentation 59 (7%), cephalo pelvic disorders 52 (6.5%), and hypertensive disorder in pregnancy 33 (4%).
Conclusions: Prevalence of cesarean section in a tertiary care hospital is high compared to WHO data. The most common indication of cesarean section are fetal distress and previous cesarean section.
The Efforts of Talang Mamak Indigenous People to Maintain Their Existence in Customary Forest Resources Battle
Authors: Charin Rizky Octa Putri , Hidayat Arief 
Published: July 2019

The resources of Customary Forest play an important role for Talang Mamak Indigenous People to survive. The exploitation of the forest by private company and investor has caused a violent conflict. The situation of the indigenous people becomes worsen since local government does not fully protect their rights on the forest. Even, Local government tends to defend private company and investor in addressing the conflict. Customary forest of Talang Mamak indigenous people is in the oligarchs grip and conflict of interest with their elder. The Indigenous people are in crossroad, to preserve or to release their heritage and right. This study aims to determine the efforts of Talang Mamak Indigenous People to maintain their existence in the customary forest resources battle with private company and investor. This study used qualitative descriptive method. The data collection were documentation analysis and other relevant literature. This study used Theory of Oligarchy (Winters 2011) as grounded theory. The result found that the efforts of the indigenous people to fight for their rights getting weak. Some of them begin to accept compensation from the company and investor, in other word, some of them are willing to release their heritage and right on the forest.
Müdür Yardımcılarının Gözüyle Ortaöğretim Öğrenci Pansiyonlarında Yaşanan Sorunlar (Karaman İli Örneği)
Authors: ÜNAL Ali , ÜREYEN Sadi 
Published: July 2019

Türkiye’de
fırsat ve imkan eşitliğini sağlamak için yapılan uygulamalardan birisi, kırsal
bölgelerde yaşayan öğrencilerin eğitim görebilmeleri için yatılı ve pansiyonlu
okulların açılmasıdır. Bu kapsamda ortaoöğretim kurumlarında okuyan
öğrenciler, pansiyonlu okullara
yerleştirilmektedir. Bu araştırmada Karaman İli ortaöğretim öğrenci pansiyonlarında yaşanan
problemleri tespit ederek bu problemlere ilişkin çözüm
önerileri geliştirmek amaçlanmıştır. Araştırma, nitel araştırma desenlerinden
olgubilim (fenomenoloji) deseninde yürütülmüştür. Veriler, Karaman İlinde
pansiyonlu okullarda görev yapan, pansiyondan sorumlu 17 müdür yardımcısından
toplanmıştır. Veriler yarı yapılandırılmış görüşme ile toplanmış olup, içerik
analiziyle çözümlenmiştir. Karaman’da ortaöğretim öğrenci pansiyonlarında
yaşanan sorunlar, fiziki sorunlar, insan kaynaklarıyla ilgili sorunlar ve
mevzuattan kaynaklanan sorunlar olarak üç temada bütünleştirilmiştir. Fiziki
sorunlar temasının altında pansiyonun projelendirilmesi ve binalarda kullanılan
cihaz ve malzemelerle ilgili sorunlar tespit edilmiştir. İnsan kaynaklarıyla
ilgili sorunlar temasının altında personel eksikliği, personelin disiplin ve
performans sorunları, personel eğitiminin yetersizliği ve okuldaki diğer
yöneticilerle eş güdümlü çalışma sorunları tespit edilmiştir. Mevzuattan
kaynaklanan sorunlar teması altında, bakım onarım bütçesinin olmaması, nöbetçi
belletici öğretmen ücretleri, yemek ücretlerinin yetersizliği ve pansiyonda
başka okulun öğrencilerinin kalması sorunları tespit edilmiştir. Yapılan tespitler
doğrultusunda uygulayıcılara ve araştırmacılara yönelik önerilerde
bulunulmuştur.
Les sulfures des lherzolites et ariégites
Authors: Besson Maurice 
Published: July 2019

Les sulfures — essentiellement pyrrhotite, pentlandite en deux générations, chalcopyrite et cubanite — rencontrés dans des échantillons de lherzolites et d' ariégites en provenance du massif d'ultrabasites de Lherz dans les Pyrénées ariégeoises sont décrits, ainsi que leurs assemblages. 21 analyses à la microsonde de ces sulfures sont fournies et permettent, dans le cas des ariégites, d'évaluer la composition globale des agrégats de sulfures puis, par référence aux résultats expérimentaux obtenus dans le système Fe-Ni-S, de suivre le processus de cristallisation de ces assemblages. Les pressions d'oxygène et de soufre à 1 100° C, température proche de la température de figement des silicates hôtes, sont évaluées dans les intervalles : log ƒO₂ de — 10,4 à — 13,4 pour les lherzolites, — 12 à — 15 pour les ariégites ; log ƒS₂ de — 3 à — 6 pour les lherzolites, — 4 à — 6 pour les ariégistes.
IDENTIFICACIÓN DE TRIPS (THYSANOPTERA: THRIPIDAE) EN EL CULTIVO DE MANGO (Mangifera indica L.) EN COSTA RICA
Authors: León Ruth , Gamboa Jimmy , Elizondo Ricardo 
Published: July 2019

Durante los años 2000 a 2002, se realizaron recolectas de trips asociados al cultivo demango. Se identificaron ocho especies de trips, Haplotrips gowdeyi Franklin, Frankliniellagossypiana Hood, Frankliniella pr. gossypiana, Frankliniella insularis, Frankliniella cubensis,Selenotrips rubrocinctus, Scirthotrips sp. y Frankliniella sp., de las cuales el mayor número
son del género Frankliniella y otros del género Selenotrips. Asimismo, en algunas plantacio-nes que no se incluyeron en este trabajo se presentó Frankliniella cephalica. Este estudio
permitió determinar que en las plantaciones de mango se encuentra un “complejo de trips”,del cual se conoce poco sobre la sincronización que se da entre las especies involucradas.El daño lo causan las formas no aladas o inmaduras, al tener un aparato bucal en forma deestilete con el cual succionan la savia en el fruto, provocando deformación del mismo.
Customary Justice Model in Resolving Indigenous Conflicts in Merauke Regency Papua
Authors: Silambi Erni Dwita , Alputila Marlyn Jane , Syahruddin Syahruddin 
Published: July 2019

The background of the keyword is the agenda of customary justice in the government which is clearly burdened by rules that are recognized and carried out well, making it possible to provide recognition of the prevailing customs in the community. The "confession" here is formal approval. The focus of the research is the implementation of customary justice in Papua in terms of Law Number 21 Year 2001 concerning Special Autonomy for Papua. The research objective is to design or formulate a model of customary justice in Papua. The target of the study is to get the right model of customary justice that is understood in their decisions in solving problems that occur in Papua. Merauke.Metote research in this research is qualitative research. The research conducted is learning, literature, taking data and interviews in depth. After that the data obtained are described and analyzed with quantitative methods to formulate economic empowerment models. The results of this study are the existing customary models, so that in the context of customary cases there are also cases where adat cases can be issued by the community.
Keywords: Model; Customary Justice.