bluuebunny/crossref_metadata_2025 huggingface dataset:
Trabajar en enfermería durante la pandemia de la covid-19
Authors: Ramacciotti Karina
Published: August 2022

La enfermería es un sector clave de los equipos de salud ya que tienen un vínculo estrecho y continuo con los pacientes. Ese rol insustituible de la enfermería no surgió con la pandemia de la covid-19, pero quedó mucho más visible dado su activo protagonismo en las tareas de rastreos, hisopados, cuidados durante las internaciones, comunicación con familiares y campañas de vacunación. En este artículo se estudiarán las representaciones del sector en lo que fue vivido como cambios en las rutinas laborales a partir de la pandemia de la covid. Se explorará en las actividades que se incrementaron y se modificaron a partir de la pandemia y se hará foco en dos cuestiones emergentes; las dudas, especialmente en el inicio de la pandemia, en torno a las medidas de bioseguridad y las incertidumbres en torno a los tratamientos a seguir. Luego revisaremos las estrategias implementadas, individuales y colectivas, para enfrentar momentos difíciles durante las internaciones tal como el acompañamiento de la muerte.
Revisión de Pedro Bravo. 2018. Exceso de equipaje. Por qué el turismo es un gran invento hasta que deja de serlo
Authors: Azevedo Pedro , Pereiro Xerardo
Published: August 2022

  
A pilot study on the lung morphology of shelter dogs in relation to air pollution in Trinidad
Authors: Mohamed Reda A. , Georges Karla , Rajh Stacy , Suepaul Rod B.
Published: August 2022

OBJECTIVE

To identify and characterize the gross and histological lesions associated with air pollution in the lungs of dogs from various locations in Trinidad.

ANIMALS

56 fresh lungs were obtained from already euthanized adult dogs collected from different locations in Trinidad at the Trinidad and Tobago Society for the Prevention of Cruelty to Animals.

PROCEDURES

Lung specimens were examined grossly and tissue samples were taken for routine histologic examination.

RESULTS

Histological examination showed that 51.8% of the dogs had evidence of anthracosis. Dogs with anthracosis had greater median lesion scores compared to dogs without anthracosis (P = .022). There was no association between the presence of anthracosis and any other lesion in this study (P > .05).

CLINICAL RELEVANCE

There was evidence that dogs with anthracosis had a greater degree of nonspecific lung histologic lesions. Using the dog as a sentinel model for human exposure in Trinidad, our findings indicate that environmental air pollution may also have an effect on the respiratory health of the human population. It is important for the public to be aware of air pollution, and the government of Trinidad and Tobago should develop an intervention protocol along with veterinary and human medical epidemiologists to reduce air pollution in the country.
In the Captivity of the Present. Approaches to Son of Saul by László Nemes Jeles
Authors: Sághy Miklós
Published: August 2022

Son of Saul, the Hungarian director, László Nemes Jeles’s film about Holocaust was released in 2015 with great international success: Grand Prix of the Cannes Film Festival, the Academy Award and Golden Globe for best foreign-language film. In my essay, I approach the film from a variety of perspectives. First, by analysing the visual and aural level of the film I intend to show how – in a very original way – Son of Saul is capable of depicting the understandably limited perspective and numb state of mind of the protagonist, a member of the Sonderkommando. In the second section, I compare Son of Saul with the Nobel Prize winner novel, Fatelessness (1975) by Imre Kertész. I argue that these two works show strong similarity in their storytelling and staging of the Holocaust. Both works miss a looking back in hindsight and the historical perspective, confining their protagonists to the present. Thirdly, I examine the relation between the absurd mission of Saul saving the dead boy and the problem of remembering and commemorating the Holocaust. Finally, I try to map the traces of popular genres in Son of Saul. I recon the film applies – on the one hand – the audiovisual techniques of the POV-horror genre while – on the other hand – the media and presentation tactics of first-person-shooter video games. The application of well-known media procedures can thus bring the historical event that can be hardly visualized or verbalized closer to the younger generation. With the Holocaust fading away in the past and the number of survivors and witnesses radically decreasing, this is certainly becoming more and more important.
Finance Film on Must-See Lists: A Tale of Positivization
Authors: Parvulescu Constantin
Published: August 2022

The article shows the way must-see film lists hosted by financial publications positivize, after the 2008 crisis, the message of feature and documentary films representing finance. Here positivization refers to the detouring or softening of the critical edge of the message of a film in the interests of the hosting website and the profession of finance in general. Emphasis falls on financial literacy and on a film’s artistic prestige and entertainment potential. The author argues that positivization is a semantic strategy indicative of a neoliberal business ontology that informs the interpretation of cultural artifacts. It instrumentalizes signification processes in order to foreground exchange value and present film reception as an investment in human capital.
Measuring the Impact of the Coviid-19 Crisis on the Foreign Tourist Receipts
Authors: Trajkov Aleksandar , Andreeski Cvetko , Biljan Jovanka
Published: August 2022

Tourism is a significant economic activity for developing any national economy and the world economy as well. Revenues generated through tourism services affect GDP and directly stimulate economic growth. The revenues are important for the national economies, i.e. the foreign exchange inflow, generated through tourist services export. However, many factors directly impact on the volume of foreign tourist arrivals, and thus directly affect both foreign exchange inflows and GDP. Government measures taken for various reasons that have a straight impact on the movement of people significantly reduce tourist travels. It can cause numerous and robust adverse effects on the national economy. The health crisis caused by the pandemic COVID – 19 has led to restrictive governmental measures that had a negative impact on tourist travels, and thus on the revenues generated from the export of tourist services. The paper aims to measure the effect of the COVID - 19 crises on the income generated by the foreign tourists’ arrivals in Ohrid, as a case study destination in North Macedonia. The research results will show the losses this economic sector has suffered from the “lockdown” caused by the pandemic.
Analysis of Motivation Factors: Dependance on Personal and Professional Characteristics of Employees
Authors: Rakić Marija , Radosavljević Marija , Milić Vesna Janković
Published: August 2022

Organizations invest in different types of resources, which enable them to achieve and maintain their market position and remain competitive. With global competition and changing market environment, one of the key resources, which considerably contributes to improvement of organizations’ competitive posture, are human resources, i.e. employees. The subject of research presented in this paper are factors of employees’ motivation. The aim of the research is to determine the impact of certain factors on employee motivation, based on the importance that different motivation factors have, depending on certain personal and professional characteristics of employees. Based on the results of the survey, the most important factors of motivation are financial factors, specifically the “salary” and “financial rewards”, as well as “job security” as non-financial factor. The variance of repeated measurements showed that there is statistically significant influence of financial motivation factors on employee motivation. However, the results of the analysis of the variance indicate that it is necessary to find the appropriate combination of financial and non-financial motivators, having in mind different characteristics and needs of employees, in order for the employee motivation system to show the expected results.
Factors Affecting Digital Transformation of Insurance in the Republic of Serbia
Authors: Stanković Jovica , Stanković Jelena Z. , Tomić Zoran
Published: August 2022

Implementation of IT innovations in insurance industry enhances actual business models and creates new ones. E-insurance refers to creating and providing insurance and connected financial services through digital solutions. In this paper the impact of IT usage and digitalization on insurance sector in the Republic of Serbia is analysed. The aim of the proposed analysis is to reveal the determinants of the adoption of innovative technological solutions in insurance in the Republic of Serbia. Relying on the TOE framework, three groups of factors influencing the adoption of IT in e-insurance are identified: technological, organizational and environmental. Panel data approach and logistic regression are used to examine the effects of proposed factors on e-insurance adoption. The obtained results indicate that organizational and environmental factors have statistically significant influence on the achieved level of e-insurance adoption, while only the market share of the insurance company positively influences the odds of e-insurance adoption. Therefore, it can be concluded that e-insurance in the Republic of Serbia is the matter of reputation and tendency of insurers to achieve short-term gains and a competitive advantage through innovation.
An Overview of Selected Tools and Strategies for Agricultural Land Protection in Slovakia and the European Union
Authors: Machničová Zina
Published: August 2022

Agricultural land, as a component of the environment, is one of the irreplaceable natural resources and, at the same time, through its functions, is an integral part of the quality of human lives. Several international institutions or scientists point to problems with land loss or decline in quality and, ultimately, to the increased need for soil protection, based on which governments implement various tools. The aim of the paper is therefore to compile a general overview of existing tools for the protection of agricultural land in Slovakia and to analyse selected strategies for land protection in the EU. The main source of information was represented by literary sources of publications by scientific researchers, Slovak and European bodies or institutions, and, last but not least, legal acts. The paper points to a wide range of existing tools and innovative strategies for the protection of agricultural land in Slovakia and the EU.
Preliminary results of European budworm Choristoneura murinana (Hubner) impact on Greek fir radial growth at Mts Parnassus and Giona
Authors: Petrakis Panos V. , Koulelis Panagiotis P. , Fassouli Vassilia P. , Solomou Alexandra D.
Published: August 2022

During the spring of 2020, Choristoneura murinana (Hubner) otherwise European Fir Budworm (EFB) was recorded on Abies cephalonica near the villages of Kaloskopi and Agoriani in Central Greece at the mountains Giona and Parnassus respectively. To our knowledge, the occurrence of the particular pest on the specific mountains has not been described yet. We found that EFB mostly prefers Abies cephalonica and less Juniperus oxycedrous in sunny areas and/or near the country roads. Across the study area, local severe infestations of scale 2, 3 and 5, were observed. In many cases the infestation was observed in adult fir individuals. Defoliations and severe outbreaks, which are presumably incurred by EFB were also observed by local people (beekeepers, foresters, herb collectors) in the past. Our laboratories field measurements and the analysis of the Singular Spectrum analysis trendlines revealed growth decline, not connected with climatic parameters but probably associated with observed defoliations by the EFB.
Species variability in the relative strength of intraspecific and interspecific interactions
Authors: Foxx Alicia J.
Published: August 2022

Understanding cases in restoration and in agriculture in which species diversity improves productivity and ecosystem functioning is crucial due the need to restore degraded habitat and improve crop productivity for a growing human population. Reaching these diversity benefits is likely influenced by the dynamic of less negative interspecific than intraspecific interactions that promote diversity. But further testing is needed to understand the relationship of intraspecific-relative to interspecific interactions. Here I used seedlings from three native and one introduced species used in restoration in the western United States in pairwise interaction combinations and found that the study species varied in shoot biomass in response to interaction treatments of the control, intraspecific, and interspecific interactions (R
2 = 0.7, p < 0.001), and that intraspecific interactions were more negative than interspecific interactions for four of five of the pairings. Overall, as shoot mass size differences increased between interspecific neighbors, interactions became more positive (R
2 = 0.6, p < 0.001). These findings point to variability in species responses in whether the focal species compete more intensely with conspecific or heterospecific neighbors and indicates the need for more careful selection of interacting species for meeting both agricultural and restoration goals.
A Study on Autonomous Integrity Monitoring of Multiple Atomic Clocks
Authors: Xiao Bo , Liu Ya , Xue Yanrong , Li Xiaohui
Published: August 2022

A stable and reliable time keeping system depends on the integrity monitoring of the atomic frequency standard. This paper reports a scheme for autonomous integrity monitoring of multiple atomic clocks, which combines the frequency standard comparison method and the frequency jump detection method. The frequency standard comparison method uses multi-channel synchronous acquisition technology and digital frequency measurement technology to realize the precise measurement of multiple atomic frequency standards. The frequency jump detection method uses adaptive filtering to predict the relative frequency difference and give an accurate and timely alarm for the abnormal of frequency jump. The results show that the noise floor frequency standard comparator is better than 6.5×10−15 s. For a relative frequency deviation of 2.0×10−6 Hz, the probability of anomaly detection is almost 100 %. The system has high frequency measurement resolution and fast alarm of frequency jump, which can meet the real-time requirements of a time keeping system for the integrity monitoring of multiple atomic clocks.
The Collection Efficiency of a Large Area PMT Based on the Coated MCPs
Authors: Wang Xingchao , Chen Lin , Wang Qilong , He Jianli , Tian li Liping , Tian Jinshou , Shen Lingbin , Wang Yunji
Published: August 2022

The electron collection efficiency (CE) of the photomultiplier tube based on microchannel plates (MCP-PMT) is limited by the MCP open area fraction. Coating MCP with a high secondary yield material is supposed to be an effective approach to improve CE. Both typical and coated MCP-PMTs are developed. A relative measurement method is proposed to characterize the collection efficiency performance. Results show that the PMT based on the coated MCPs has a significant improvement on CE, a good gain uniformity and a high precise energy resolution.
Design Wave Calculation of a Passenger Catamaran Under Multiple Load Control Parameters
Authors: Ge Shenwei , Zeng Ji , Jin Bowen , Zhou Wen , Qin Xiaolong
Published: August 2022

To determine the loading conditions considering the action of both bending and torque moment for a passenger catamaran moving among waves, a method for calculating equivalent design waves under multiple load control parameters was derived based on wave load prediction results using three-dimensional potential flow theory. The method was developed by defining the wave amplitude discrepancy factors between the primary and second load of the combined bending and torquing equivalent design wave. The primary goal was to find a reasonable design wave. Finally, the design waves of a target passenger catamaran ship were calculated using the proposed method, and each load component of every design wave for the target hull was recalculated. The average error compared with the object load component was less than 1%, which verifies the effectiveness of the method and offers an effective engineering evaluation method for a catamaran.
Effects of Rudder and Blade Pitch on Hydrodynamic Performance of Marine Propeller Using CFD
Authors: Quang Pham Ky , Van Hung Phan , Cong Nguyen Chi , Tung Trinh Xuan
Published: August 2022

The use of computational fluid dynamics (CFD) to predict internal and external flows has risen dramatically in the past decade. This research aims to use the commercial software, ANSYS Fluent V.14.5, to illustrate the effects of the rudder and blade pitch on the hydrodynamic performance of the marine propeller by experimenting with propellers and rudders of the M/V Tan Cang Foundation ship, which has designed conditions as follows: diameter of 3.65 m; speed of 200 rpm; average pitch of 2.459 m; boss ratio of 0.1730. Using CFD, the characteristic curves of the marine propeller and some important results showed that the maximum efficiency of the propeller is 0.66 with the open water propeller and 0.689 with the rudder‒propeller system at the advance ratio of 0.6. The obtained outcomes of this research are a significant foundation to calculate and design an innovative kind of propulsion for ships with high performance.
Talent Retention: Analysis of the Antecedents of Talented Employees’ Intention to Stay in the Organizations
Authors: ŠKERHÁKOVÁ Veronika , KORBA Peter , HARNIČÁROVÁ Michaela , ALI TAHA Viktória
Published: August 2022

Given the today’s hypercompetitive labour market and the lack of human capital and talents, which is exacerbated by the COVID-19 pandemic, retaining talented employees is a big challenge for organizations. Human resources managers generally know that recruitment of talented and high performing employees is crucial for survival and sustainable competitiveness. There is a lot of academic research and discussions on which factors are the most effective in talent retention. The aim of this study was to analyse the antecedents of talented employees’ intention to stay with the organizations with an accent on selected demographic characteristics. The research sample consisted of 391 respondents - employees who have been identified as organizational talents (possibly included in the talent pool, if such exists in the organization). Data was collected using a questionnaire which, in addition to demographic characteristics, contained statements focusing on individual aspects of remaining in the organization. One of the aims of the study is to find out the deeper connections between the examined variables - to find out how and why the variables are correlated with each other through factor analysis. In order to determine the significance of the factors, inference statistics methods such as the Bartlett’s Test of Sphericity, the Kaiser-Meyer-Olkin test and the principal component analysis (PCA) were used. The influence of significant independent variables (demographic factors - gender, age, education, position held and length of employment in the organization) on the value of extracted factors was examined by means of ANOVA (Analysis of Variance).
Turkish Imports of Strategic Products from Israel: Strategic Bonds amongst Turbulent Relations
Authors: CHRYSOPOULOS Dimitrios N. , KARASAVVOGLOU Ioannis A. , ZOUMPOULIDIS Vasilios
Published: August 2022

During the last two decades, Turkish-Israeli relations were downgraded from a strategic importance status to an almost hostile one. At the same time, the trade between these two countries has not been affected at all by this negative development. Even though this paradox has already been noticed in the relevant literature, scholarly works have not yet focused on the study of the strategic trade between these two countries in order to examine deeper this contradictory trade-foreign relations interaction. Taking into account that the bilateral relations reached a bottom level only after a political change in Turkey in 2002, the present paper focuses on the strategic products that Turkey imported from Israel. Therefore, the paper addresses the question whether the latter turbulent Turkish-Israeli relations have affected the Turkish imports of strategic products from Israel. To this research question, the paper hypothesizes that the unfavorable climate of the bilateral relations had a quite negative impact on the imports of such products from Israel. Thus, the aim of the paper is to study these imports of strategic products in terms of size and magnitude in order to explore their role in the overall imports of Turkey from Israel and the bilateral relations of these two countries, as well. To achieve this aim, the paper analyzes the quantitative data of Turkish imports from Israel concerning a number of strategic products, from 1995 to 2019, employing descriptive and correlation statistics. The research results reveal that strategic products constitute the main content of the imports of Turkey from Israel, while their trading took place mainly during the years when the bilateral relations had been severely deteriorated. Therefore, the role of strategic products is proved fundamental for the trade and foreign relations between Turkey and Israel.
Mapping the COVID-19 Economy: An Exploratory Bibliometric Analysis
Authors: CRISTIAN Mihai Gabriel , LAZĂR Maria , SITEA Daria Maria , ȚÎMBALARI Carolina
Published: August 2022

In recent decades, the COVID-19 pandemic is the biggest social and economic crisis that has influenced all aspects of human life. The main purpose of this research paper is to yield a bibliometric analysis in terms of research papers regarding the influence of the SARS-CoV-2 virus on the international economy. Accordingly, the findings will reveal the papers written in the domains of economics, business and business finance, management, hospitality, leisure, sport and tourism. Thus, current areas of research were examined and future study may be proposed. The analysis shows key information concerning the authors, journals, countries and keywords. It may be acknowledged that the COVID-19 pandemic was of utmost importance for the worldwide researchers. Our judgments and recommendations are supposed to act as a framework to possible research opportunities and conspicuous implications for the economic area.
Literature Review of Economic and Regional Development through Quantitative Methods and Social Network Analysis
Authors: FILENTA Pagona , KYDROS Dimitrios
Published: August 2022

Economic and Regional Development is a subject of research that is not recent in the international literature. The unequal spatial distribution of income, economic opportunities and activities has attracted the interest of a large number of researchers in recent decades. The studies focused on the spatial disparities between the regions and their evolution over time using statistical analysis methods. In this paper we present a systematic review of the existing literature of economic and regional development through quantitative methods and social network analysis. Via research questions we summarize the different research approaches and offer a discussion and suggestions for future research. To what extent has regional development been studied by quantitative methods? How is research evolving in regional development of the European Union? Has Social Network Analysis been used in the context of regional development? This paper attempts to go one step further and introduce the use of techniques and methods of Social Network Analysis in Economic and Regional Development.
Similarities between Stock Market Reactions During the 2007 Financial Crisis and the 2020-2021 Coronavirus Pandemic. Correlation and Cointegration Analyses
Authors: VLĂDOI Alexandru , MERLING Lara Greta
Published: August 2022

In light of two recent global economic shocks, the global financial crisis of 2007/08 and the COVID-19 pandemic, this paper analyzes the relationships between global shocks and the national stock markets, looking to trends in volatility for the leading stock indices in six CEE countries, namely Austria, Bulgaria, Czech Republic, Hungary, Poland, and Romania, and indices from Germany (DAX) and the United States (S&P 500). The selected indices include the largest domestic companies in each country and make up most of the domestic market capitalization. For the analysis we used Garman-Klass (GK) volatility estimator, as the volatility was considered the most important proxy for market uncertainty. Then we used a simple correlation matrix to show initial tendencies. Also, the Johansen's test was used to determine if the indices are cointegrated and if this relationship has changed significantly in the non-crisis periods. We analyze Granger causality and the network approach as proposed by Diebold and Yilmaz (2015). The GK volatility results were individualized in three periods: 2007-2011 as a proxy for the global financial crisis and European sovereign debt; 2012-2019 representing a period of economic recovery and ultimately 2020-2021 representing the data points for the COVID-19 global pandemic. We find that particularly during periods of global distress, correlations between patterns of volatility for the stock market indices from these countries increase, and they exhibit stronger patterns of cointegration. These findings highlight the increasing connectivity in global financial markets and added challenges in crafting portfolio diversification strategies based on geography of stock holdings.
Revising the Curriculum of Governance Teaching Post COVID-19
Authors: NAČINOVIĆ BRAJE Ivana , HRUŠKA Domagoj , SIGURJONSSON Throstur Olaf , MAČIUKAITĖ-ŽVINIENĖ Saulė , MINA-RAIU Laura , NASTACA Corina Cristiana , HERRERO LÓPEZ Reyes , PLOAE Catalin
Published: August 2022

Governance has become a common part of teaching curriculums for most business schools, public administration schools and other related faculties. This paper questions the content of governance curriculums taught before COVID-19 pandemic in 5 European countries and provides a comparative assessment. Research findings indicate that apart from teaching general governance courses, governance is most often taught as specific for certain organizational or industrial context. This is followed with governance from perspective of leadership and change management, but also governance within business administration discipline of strategy. However, the intensity of governance as a topic within curriculums differs significantly. Only limited number of curriculums include resilience topics which have proven their importance during COVID-19 pandemic. Findings of this paper can be used to develop unitary and internationalized curriculums on governance studies at European universities in a post COVID-19 world.
Locating the Embodied Sense of Self and Examining its Relationship with Psychological Well-Being
Authors: Hanley Adam Wesley , Lecy Natalie , Hanley Robert
Published: August 2022

Westerners tend to localize their sense of self in the head, and, to a lesser degree, in the chest. However, single-point, localization studies of the self omit direct exploration of the size and shape of the embodied self. This study explored a) beliefs about the location and spatial distribution of the embodied sense of self, and b) whether individual differences in how the embodied self was represented were associated with psychological and subjective well-being. Results from a sample of 206 American adults confirm extant reports, indicating that the embodied sense of self is most often located in the head and chest. However, results from this study extend previous findings by suggesting that the majority of respondents (70%) located their embodied sense of self in multiple body regions, and individuals that reported a more widely distributed sense of self reported greater well-being. Specifically, a more widely distributed sense of self in the torso was most strongly associated with psychological well-being. No relationship emerged between the distribution of the sense of self in the head and psychological well-being. Results from this study indicate that the sense of self may be located throughout the body, and that locating the sense of self in the torso may have psychological benefit. As such, exploring methods of shifting the sense of self out of the head and into the body may have therapeutic value.
La naturaleza de la fe: escritos de teología
Authors: García de la Sienra Adolfo
Published: August 2022

Este libro reúne los principales escritos teológicos del autor. El arco temático incluye la discusión teológica y lógico-filosófica, la apologética y el debate, en la búsqueda de una relación adecuada entre la fe y el trabajo intelectual. El recorrido incluye un testimonio de conversión personal (que ejemplifica, además, ciertas enseñanzas soteriológicas), diálogos con autores católicos sobre tópicos de la teología reformada, particularmente de la fe (en Cristo), y un estudio sobre los efectos de la fe en la transformación de la cosmovisión y sus implicaciones pedagógicas. En capítulos subsiguientes, García de la Sienra confronta argumentos conocidos de teología natural de una manera inédita: la Apuesta de Pascal y el Argumento Ontológico de San Anselmo, y enseguida discute con Rodrigo Guerra las virtudes apologéticas de una cierta concepción del hombre aparentemente universal. Más adelante, el autor cuestiona la validez de las observaciones del pastor presbiteriano José Luis Velazco Medina a la teología reformacional de Gordon Spykman, a lo que le sigue una breve reconstrucción del nominalismo occamiano, explorando su utilidad como prolegómeno para la teología reformada. El último capítulo constituye una reconstrucción lógico-matemática rigurosa de la teología del gran filósofo griego Parménides.
RANCANG BANGUN MESIN SORTASI UNTUK PENDUGAAN KUALITAS BIJI KEDELAI MENGGUNAKAN PENDEKATAN SIFAT AKUSTIK
Authors: Agustoria Khairil , Andasuryani Andasuryani , Santosa Santosa
Published: August 2022

Penentuan harga jual kedelai di pasar tradisional Indonesia saat ini masih dilakukan secara manual yaitu berupa penilaian berdasarkan penampakan visual oleh tengkulak. Hal ini tentunya menyebabkan kesenjangan harga pasar kedelai. Penelitian ini bertujuan untuk menciptakan mesin sortasi untuk pendugaan kualitas biji kedelai menggunakan pendekatan sifat akustik dengan pengendali mikrokontroller arduino. Sensor akustik yang digunakan adalah sensor suara LM393. Mesin yang dibuat menggunakan prinsip angkut belt conveyor sederhana dengan tenaga penggerak motor stepper. Hasil analisis rancangan mesin menunjukkan kapasitas kerja mesin sebesar 1,431 kg/jam, torsi kerja sebesar 0,000085 Nm dan daya mesin sebesar 7,038 watt. Hasil pengujian data akustik pada kedelai dengan kadar air yang sama 10,65% dengan massa rata-rata 0,202 gram (Grade A) dan pengujian data akustik pada kedelai dengan massa rata-rata 0,165 gram (Grade B) masing-masing menghasilkan rata-rata nilai amplitudo sebesar 3671 mV dan 1993 mV. Berdasarkan uji statistik menggunakan metode Independent T-Test didapatkan nilai signifikansi sebesar 0,000 (P<0.05) menunjukkan perbedaan bobot kedelai memiliki pengaruh yang nyata terhadap data akustik biji kedelai.
RANCANG BANGUN MESIN PEMBELAH BUAH PINANG (Areca cathecu L.) DENGAN SUMBER PENGGERAK MOTOR LISTRIK
Authors: Putri Irriwad , Zainal Putri
Published: August 2022

Komoditas buah pinang (Areca catechu L.) sudah tidak asing lagi di Tanah air. Pascapanen buah pinang terdiri dari beberapa metode, tergantung dengan jenis pinang dan kebutuhan dari masyarakat salah satunya adalah proses pembelahan. Pembelahan pinang yang dilakukan oleh masyarakat masih dengan cara tradisional dan memerlukan keahlian khusus, tenaga kerja yang banyak, jam kerja yang lama sehingga mempunyai kapasitas kerja yang rendah serta peluang terjadinya kecelakaan kerja cukup besar. Penelitian ini bertujuan untuk melakukan Perancangan Mesin pembelah Pinang Tua dengan Menggunakan Dua Silinder pembelah sebagai teknologi tepat guna bagi masyarakat dengan kapasitas yang lebih besar dari pembelahan tradisional dan memperhatikan keselamatan kerja. Penelitian ini dilakukan di laboratorium Manajemen Produksi Alat dan Mesin Pertanian, Teknik Pertanian dan Biosistem. Penelitian ini menggunakan metode eksperimen dengan tahapan penelitian meliputi identifikasi masalah, inventarisasi ide, penyempurnaan ide, serta perancangan fungsioanl dan struktural serta pengujian mesin. Pada penelitian ini menggunakan sampel buah pinang tua dengan kadar air 71,5% yang berasal dari daerah padang dengan berat sampel untuk masing-masing pengulangan adalah 10 kg. Pengulangan dilakukan sebanyak 3 kali sehingga total sampel yang digunakan adalah 30 kg. Dari pengujian yang telah dilakukan diperoleh Kapasitas kerja efektif Mesin 55,68 kg/jam, Efisiensi alat 47,72%, rendemen pembelahan 64,3%, rata-rata kerusakan hasil sebesar 10,1%, rata-rata kehilangan hasil 2,3 %, persentase pinang tidak terbelah 23,3%, dan tingkat kebisingan untuk tanpa bahan dan ada bahan adalah sebesar 85,9 dan 96,6 dB. Secara keseluruhan mesin pembelah pinang ini mempunyai kapasitas kerja lebih besar jika dibandingkan dengan pembelahan manual.
PENGAMBILAN MINYAK ATSIRI BUNGA MELATI DENGAN METODE ENFLEURASI
Authors: Sundari Elmi , Pasymi Pasymi , Praputri Erti , Sofyan Sofyan
Published: August 2022

Pengambilan minyak melati (Jasminum sambac) dengan metode enfleurasi telah dilakukan dengan memvariasikan waktu enfleurasi dan jenis adsorben. Metode enfleurasi dapat mencegah kerusakan minyak atsiri yang diperoleh karena dilakukan pada suhu rendah. Tujuan penelitian untuk melihat jenis adsorben dan berat bunga yang tepat untuk mendapatkan minyak melati optimum. Penelitian dilakukan dengan memvariasikan jenis adsorben (mentega putih dan mentega kuning) dan waktu enfleurasi (6, 10, 12, 16, dan 20 hari). Parameter yang diamati adalah rendemen, komponen minyak, densitas, aroma dan warna minyak yang diperoleh. Hasil penelitian menunjukkan adsorben mentega putih lebih efektif dibandingkan mentega kuning dengan perolehan minyak atsiri tertinggi pada waktu enfleurasi 20 hari dan jumlah bunga 230 gram dengan rendemen 8,69%. Perolehan minyak terendah dengan rendemen 5,21% menggunakan adsorben mentega kuning pada waktu enfleurasi 10 hari dengan berat bunga 115 gram. Komponen-komponen dominan yang terdeteksi dalam minyak diantaranya adalah linalool (8,82%), benzyl acetat (4,58%), hexyl salicylate (4,90%), 1-Phenanthrenecarboxylic acid (5,99%), versalide (3,14%), dan 3-phenyl-propenal (3,29%). Minyak melati yang dihasilkan berwarna kuning muda jernih dengan densitas berkisar antara 0,8821-0,8845 g/mL pada penggunaan adsorben mentega putih dan 0,8175-0,8675 g/mL dengan adsorben mentega kuning. Hasil uji organoleptik menunjukkan rata-rata panelis menyukai aroma dan warna pada minyak melati pada perlakuan waktu enfleurasi 6, 10, dan 12 hari dengan tingkat kesukaan panelis 100% suka
FORMULASI PEMERAH PIPI (Blush on) DARI EKSTRAK KULIT BUAH NAGA MERAH (Hylocereus polyrhizus)
Authors: Amaliasari Kurnia Rahmah Nurshiyam , Putri Selly Harnesa , Bunyamin Anas
Published: August 2022

Kulit buah naga merupakan limbah yang masih jarang dilakukan pengolahan atau pemanfaatan kembali. Kulit buah naga mengandung antosianin yang berpotensi menjadi pewarna alami. Blush on atau pemerah pipi merupakan salah satu produk kecantikan yang banyak digunakan dengan menyajikan warna beragam. Penelitian ini bertujuan untuk mengaplikasikan ekstrak kulit buah naga pada sediaan blush on dengan menentukan formulasi dan konsentasi ekstrak kulit buah naga yang memiliki karakteristik serta kelayakan mendekati produk komersial dan banyak disukai. Ekstraksi dilakukan secara maserasi dengan 2 perlakuan, yaitu menggunakan pelarut etanol 96%, dan pelarut etanol 96% dengan penambahan asam sitrat 10%. Ekstrak dilakukan analisis, kemudian hasil ekstrak terbaik diaplikasikan pada sediaan blush on. Formulasi sediaan blush on dilakukan dengan variasi konsentrasi ekstrak 0%, 5%, 10%, 15%, dan menggunakan bubuk kulit buah naga. Sediaan dievaluasi dengan uji organoleptik, homogenitas, pH, uji iritasi, dan daya lekat. Hasil penelitian menunjukkan sediaan dengan konsentrasi ekstrak 15% memiliki karakteristik mendekati produk komersial dan paling disukai panelis setelah produk komersial.
DESAIN DAN UJI KINERJA MATA PISAU MODIFIKASI PADA MESIN PENCACAH LIMBAH PERTANIAN
Authors: Santoso Dwi , Waris Abdul , Apriliansyah Apriliansyah , Sirait Sudirman , Murtilaksono Aditya
Published: August 2022

Mesin pencacah memiliki berbagai macam komponen, salah satu komponen utama yang mempengaruhi kinerja mesin pencacah adalah mata pisau. Adapun yang mendasari dilakukannya modifikasi mata pisau mesin pencacah limbah pertanianyaitu, mata pisau yang digunakan pada sebelumnya memiliki kinerja yang kurang optimal sehingga dapat menyebabkan kualitas pemotongan bahan belum optimal dan seragam. Penelitian ini bertujuan untuk mengetahui kinerja mesin pencacah limbah pertanian setelah digunakan mata pisau yang dimodifikasi. Penelitian dilaksanakan mulai dari bulan November hingga Maret 2021. Bertempat di Laboratorium Mekanisasi, Fakultas Pertanian, Universitas Borneo Tarakan. Penelitian ini terdiri beberapa tahapan yaitu identifikasi masalah, modifikasi mata pisau, uji kinerja dan analisis data. Parameter penelitian yang digunakan adalah menghitung kapasitas efektif alat (kg/jam), kecepatan linear (m/s), rendemen (%), suhu mesin penggerak (t), dan kecepatan electromotor (RPM). Dari hasil analisis data berdasarkan parameter yang digunakan diperoleh nilai kapasitas efektif alat 9,14 kg/jam, kecepatan linear 5,28 m/s, rendemen 91,4%, rata – rata suhu 68,3 °C dan rata – rata kecepatan electromotor 234,9 rpm pada mata pisau standar. Kinerja tebaik mesin pencacah limbah pertanian yaitu pada saat menggunakan mata pisau hasil modifikasi dengan  sudut kemiringan mata pisau 10° dengan nilai kapasitas efektif alat 16,35 kg/jam, kecepatan linear 6,20 m/s, rendemen 96,5%, rata – rata suhu 55,5 °C dan rata – rata kecepatan electromotor 275,4 rpm.
PENGEMBANGAN METODE IMAGE PROCESSING UNTUK GRADING BUAH SALAK PADANG SIDEMPUAN (Salacca sumatrana)
Authors: Nasution Fachri Ibrahim , Andasuryani Andasuryani , Putri Renny Eka
Published: August 2022

Buah salak merupakan suatu hasil pertanian di Indonesia, daerah Kabupaten Tapanuli Selatan menjadi salah satu sentra produksi buah salak terbesar di Sumatera Utara. Penanganan pascapanen buah salak asal Tapanuli Selatan ini atau yang sering disebut buah salak Padang Sidempuan belum dilakukan secara maksimal, sehingga dibutuhkan suatu penanganan buah salak terutama dalam proses grading berdasarkan kualitas buah salak. Penelitian ini memiliki tujuan untuk pengembangan metode image processing buah salak Padang Sidempuan dalam pengelompokan ukuran buah salak menggunakan software Matlab R2015a, serta mengidentifikasi sifat fisik dan kadar air buah salak Padang Sidempuan dari Desa Parsalakan. Proses grading buah salak mengacu pada  (SNI 3167, 2009) mengenai bobot buah salak. Hasil yang diperoleh dari penelitian ini adalah program grading model major (Bwarea) dengan tingkat kecocokan 65,0% dengan rata-rata kesalahan pada uji validasi 16,37% dan nilai validasi model yang diperoleh antara bobot buah salak dan Bwarea buah salak Padang Sidempuan dengan nilai R2 0,833. Model intermediate (Bwarea) dengan tingkat kecocokan 78,33% dengan rata-rata kesalahan pada uji validasi 18,45% dan nilai R2 0,882. Model minor (Bwarea) dengan tingkat kecocokan 70,0% dengan rata-rata kesalahan pada uji validasi 12,66% dan nilai R2 0,8879. Model mean (Bwarea) dengan tingkat kecocokan 76,67% dengan rata-rata kesalahan pada uji validasi 8,99% dan nilai R2 0,9528.
FERMENTASI Aspergilus sp UNTUK PENINGKATAN RENDEMEN DAN MUTU MINYAK ATSIRI LIMBAH INDUSTRI SIRUP KALAMANSI
Authors: Tutuarima Tuti , Handayani Dewi , Budiyanto Budiyanto , Hartawi Ade Tri
Published: August 2022

Orange peel is one of byproduct from the kalamansi syrup industry. Orange peel oil is stored in the oil gland of the skin (flavedo). Orange peel contains cellulose, hemicellulose, pectin and other components. Degradation carried out by biological agents such as bacteria and fungi can increase oil yield. This study aimed to determine the effect of fermentation time and the amount of inoculum on the yield of orange oil. This study consisted of two factors, namely the length of fermentation (2 days, 4 days, 6 days) and the number of inoculums (2.5%, 5%, 7.5%). The data obtained were analyzed using ANOVA and DMRT methods. The results showed that the length of fermentation time and the number of inoculums had a significant effect on the increase in yield and had no significant effect on the quality characteristics of the essential oil of kalamansi orange peel. The highest yield was obtained at 4 days fermentation with an inoculum of 7.5%.
The Performance of Visible Light Communication Bit Error Rate with Power Allocation Strategy
Authors: MARSUKI AMINAH INDAHSARI
Published: August 2022

Visible Light Communication (VLC) is a communication system that uses visible light as its transmission medium to transmit information signals with Light Emitting Diode (LED) and LASER light sources using visible light between 400 THz (375 nm) to 800 THz (780 nm). VLC has several advantages over the use of radio frequencies in a system. Performance analysis is needed to prove these advantages. Performance analysis was carried out using a mathematical computational simulation using google colab with the python programming language. By taking into account the power allocation (?) strategy in the form of gain ratio power allocation (GRPA) and static power allocation (SPA). The interesting thing from this research is that the power allocation in the VLC system greatly influences the resulting performance. So, it can be locked that the SPA power allocation strategy can be adjusted by producing ?? = 1 and finding the optimal BER value in the range of 10-6 to 10^-3.
Transarterial embolization for convexity dural arteriovenous fistula with or without pial arterial supply: A report of four patients
Authors: Korai Masaaki , Enomoto Noriya , Satoh Koichi , Matsubara Shunji , Kanematsu Yasuhisa , Yamaguchi Tadashi , Hanaoka Mami , Niki Hitoshi , Matsuzaki Kazuhito , Bando Koji , Hagino Hirotaka , Takagi Yasushi
Published: August 2022

Background:

Convexity dural arteriovenous fistulae (dAVF) usually reflux into cortical veins without involving the venous sinuses. Although direct drainage ligation is curative, transarterial embolization (TAE) may be an alternative treatment.

Case Description:

Between September 2018 and January 2021, we encountered four patients with convexity dAVFs. They were three males and one female; their age ranged from 36 to 73 years. The initial symptom was headache (n = 1) or seizure (n = 2); one patient was asymptomatic. In all patients, the feeders were external carotid arteries with drainage into the cortical veins; in two patients, there was pial arterial supply from the middle cerebral artery. All patients were successfully treated by TAE alone using either Onyx or N-butyl cyanoacrylate embolization. Two patients required two sessions. All dAVFs were completely occluded and follow-up MRI or angiograms confirmed no recurrence.

Conclusion:

Our small series suggests that TAE with a liquid embolic material is an appropriate first-line treatment in patients with convexity dAVFs with or without pial arterial supply.
A case of refractory chronic subdural hematoma and internal carotid artery stenosis sequentially treated with surgical drainage, middle meningeal artery embolization, and carotid artery stenting
Authors: Imai Ryotaro , Akiyama Takenori , Mizutani Katsuhiro , Toda Masahiro
Published: August 2022

Background:

Both chronic subdural hematoma (CSDH) and ischemic cerebrovascular disease are commonplace in the clinical context, and their combination is sometimes experienced. We describe a unique and challenging case in which both therapeutic interventions were indispensable and performed in a sequential manner. This report aims to discuss the management of hemorrhagic and ischemic conditions where CSDH and carotid artery stenosis coexist.

Case Description:

An 83-year-old male presented with the left cerebral infarction due to the left internal carotid artery (ICA) stenosis. The coexisting left CSDH was surgically drained first. Then, the left middle meningeal artery (MMA) was endovascularly embolized to prevent hematoma recurrence under antiplatelet therapy, before the left carotid artery stenting (CAS) was successfully conducted. The subdural hematoma gradually grew but remained asymptomatic. However, he later presented with another stroke due to the progressive right ICA stenosis that had been conservatively treated initially. Emergency right CAS was required eventually.

Conclusion:

Under the circumstances where CSDH is present but antiplatelet therapy is inevitable, MMA embolization could be a reasonable treatment option to avoid additional surgical procedures. Furthermore, early intervention should be considered even for asymptomatic carotid stenosis in terms of shortening the administration period of antiplatelet agents.
A cervical solitary fibrous tumor with intramedullary invasion
Authors: Ciuffi Andrea , Saleh Christian , Terreni Maria Rosa , Jaszczuk Phillip , Zekaj Edvin , Menghetti Claudia , Franzini Andrea , Servello Domenico
Published: August 2022

Solitary fibrous tumor is a tumor originating from the mesenchymal cells, which occurrence in the central nervous system is extremely rare and was described in few patients as to yet. We report on a 53-years old male patient presenting with right upper limb radicular pain and ipsilateral limbs paresis, who was diagnosed with a cervical spinal lesion which, after surgical resection, resulted to be a solitary fibrous tumor (SFT). We discuss imaging, clinical and histopathological findings to allow considering this tumor early in the differential diagnosis.
Accessory nerve ancient schwannoma: A case report
Authors: Otero-Fernández Paula , Ruiz-Escribano-Menchén Lourdes , Herrera-Montoro Violeta , Morcillo-Carratalá Rafael , Calvo-García Manuel , Llumiguano-Zaruma Carlos
Published: August 2022

Background:

Lower cranial nerve schwannomas are rare and only 63 cases originating from the accessory nerve have been documented.

Case Description:

We report a 61-year-old man who presented with a 3-month history of dysmetria, ataxic gait, and frequent falls. Magnetic resonance imaging revealed a giant rim-enhancing cystic lesion at the right cerebellomedullary cistern, which markedly displaced the brainstem and caused a critical compression on surrounding structures and mild hydrocephalus. Even though the nature of this lesion was not clear, it received a radiological diagnosis of meningioma as first option. Surgery was performed through an extended far lateral retrosigmoid approach with C1 hemilaminectomy, with intraoperative neurophysiological monitoring. A near-total resection was achieved due to the adhesion of the lesion to the brainstem and to the cranial nerves VII, VIII, IX, X, XI, and XII. Intraoperatively, the tumor was found to arise from the accessory nerve. The histopathological analysis concluded with a final diagnosis of ancient schwannoma, a rare histological subtype characterized by degenerative changes, typical from long-standing tumors.

Conclusion:

Very few cases of intracranial ancient schwannomas have been described. To the best of our knowledge, this is the first report of this extremely rare histological variant arising from the intracisternal component of the XI nerve. The rarity of this disease at this location may lead to preoperative misdiagnosis.