bluuebunny/crossref_metadata_2025 huggingface dataset:
Keragaman Serangga Hama pada Tanaman Asparagus (Asparagus officinalis L.) di Sentra Budidaya Tanaman Agroduta Lembang Jawa Barat
Authors: Susanto Agus , Supriyadi Yadi , Tohidin Tohidin , Iqbal Mohammad
Published: July 2019

ABSTRACTVariety of Insect Pest on Asparagus Plant (Asparagus officinalis L.) in Agroduta Plant Cultivation Center Lembang West JavaAgroduta Plant Cultivation Center Lembang West Java is facing some constraints in increasing asparagus production; one of them is the presence of plant pest organisms. Asparagus is a subtropical plant rarely cultivated in Indonesia and may have different types of pests. Therefore, information on the presence and diversity of pests on asparagus planting is important to be assessed. This research aimed to study the diversity of insect pests on the land of asparagus plants in the Agroduta Cultivation Center Lembang, West Java. This study used survey methods where the collected data included the number and type of insects caught that the diversity index then were calculated. The samplings were using adhesive yellow trap and pitfall trap, carried out 6 times a week. The experiments were conducted on a land size of 12 x 6.5 m with an altitude of 1273 meters above sea level (masl). The results showed that the insects caught during the experiment were 7 insects, consisting of 17 families and 21 species, while the number of individual insects was 9.643. The index diversity of insects was categorized low because of the diversity index <1.Keywords: Asparagus, Diversity, Insect PestABSTRAKSentra Budidaya Tanaman Agroduta Lembang Jawa Barat menghadapi kendala dalam peningkatan produksi asparagus yaitu adanya gangguan organisme pengganggu tanaman tanaman (OPT). Asparagus merupakan tanaman subtropis yang jarang dibudidayakan di Indonesia dan kemungkinan memiliki perbedaan jenis OPT. Oleh karena itu informasi keberadaan dan keragaman hama pada tanaman asparagus perlu diketahui. Penelitian ini bertujuan untuk mempelajari keragaman serangga hama pada lahan tanaman asparagus di sentra budidaya tanaman Agroduta Lembang, Jawa Barat. Penelitian ini mengguanakan metode survey. Data yang dikumpulkan meliputi jumlah dan jenis serangga yang tertangkap yang kemudian dihitung indeks keragamannya. Pengambilan sampel dilakukan dengan menggunakan perangkap kuning berperekat (yellow sticky trap) dan perangkap jebakan (pitfall) dilakukan selama 6 kali pegamatan dalam setiap minggunya. Percobaan dilakukan pada luas lahan berukuran 12 x 6,5 m dengan ketinggian 1273 meter di atas permukaan laut (mdpl). Hasil pengamatan menunjukkan bahwa serangga yang tertangkap selama percobaan sebanyak 7 ordo serangga, yang terdiri atas 17 famili dan 21 spesies, jumlah individidu serangga sebanyak 9.643. Indeks keragaman serangga dikatagorikan rendah karena indeks keragaman <1.Kata Kunci: Asparagus, Keragaman, Serangga Hama
Respons Beberapa Varietas Padi (Oryza sativa L.) terhadap Wereng Batang Coklat (Nilaparvata lugens Stall) Koloni Karawang
Authors: Darmadi Dedi , Alawiyah Tuti
Published: July 2019

ABSTRACTResponse of rice varieties (Oryza sativa L.) to brown planthopper (Nilaparvata lugens Stall) of Karawang coloniesThe research was conducted to determine the resistant level of several rice varieties (Oryza sativa L.) against brown planthopper (Nilaparvata lugens Stall) Karawang colony. The experiment was done at the Entomology Laboratory of Pest Forcesting Institute, Jatisari, Directorate General of Food Crops, Ministry of Agriculture. It was conducted from February to June 2017. The resistant of rice varieties against brown planthopper was tested using honey dew test method with bromocressol green as indicator. Honey dew test method is one of methods to evaluate rice variety reaction against brown planthopper population origin of certain area. This is due to the production of honey dew by brown planthopper which positively correlated with the amount of liquid being drawn from the plant. This study used Duncan Test on 5% level. The result demonstrated the variation of rice resistant against brown planthopper based on the area of honey dew spot, brown planthover mortality, attacks intensity, the destruction level on plant, and the rice yield. Inpari 13 was the most toleranct rice variety against the infestation of brown planthopper of Karawang colony.Keywords: Brown planthopper, Honey dew, Paddy, Resistance, VarietiesABSTRAKPenelitian ini bertujuan untuk menilai tingkat ketahanan varietas padi (Oryza sativa L.) terhadap wereng batang coklat (Nilaparvata lugens Stall) koloni Karawang. Penilitian dilaksanakan di Laboratorium Entomologi Balai Besar Peramalan Organisme Pengganggu Tumbuhan (BBPOPT) Jatisari, Direktorat Jenderal Tanaman Pangan, Kementerian Pertanian. Penelitian berlangsung dari Bulan Februari sampai Bulan Juni 2017. Pengujian ketahanan varietas padi terhadap wereng batang coklat dilakukan dengan menggunakan metode uji embun madu (honeydew test) dengan memakai indicator bromocressol green. Metode uji embun madu merupakan salah satu metode untuk mengevaluasi reaksi suatu varietas terhadap populasi wereng batang coklat yang berkembang di suatu wilayah tertentu, karena jumlah embun madu yang dikeluarkan oleh wereng batang coklat mempunyai hubungan yang positif dengan jumlah cairan tanaman yang dihisap. Uji lanjut yang digunakan adalah uji lanjut Duncan pada taraf 5%. Hasil penelitian menunjukkan terdapat variasi ketahanan antar varietas padi yang diuji dilihat dari luas bercak embun madu yang dihasilkan pada masing-masing varietas padi, mortalitas wereng batang coklat, intensitas serangan, tingkat kerusakan tanaman, dan bobot hasil panen padi. BErdasarkan parameter tersebut di atas, Inpari 33 merupakan varietas padi yang tahan terhadap serangan wereng batang coklat koloni Karawang.Kata kunci : Embun madu, Ketahanan, Padi, Varietas, Wereng batang coklat
Hubungan Serapan N, P, dan K Tanaman Cabai terhadap Residunya di dalam Tanah yang Diberi Pupuk Cair Organik dengan NPK
Authors: Solihin Eso , Sudirja Rija , Damayani Maya , Kamaludin Nadia Nuraniya
Published: July 2019

ABSTRACTThe Relationship between N, P, and K Uptake of Chili Plants to Their Residues in Soil Treated by Liquid Organic Fertilizers and NPKThis study aims to determine the relationship of N, P, and K uptake of chili plants towards the residues in the soil treated with liquid organic fertilizer with the addition of inorganic fertilizers of N, P and K. The research was conducted from September 2017 to January 2018 in the experimental field and KTNT Laboratory, Faculty of Agriculture, Universitas Padjadjaran. The design used was simple complete randomized design with 10 treatments and were repeated 3 times, with the treatment arrangement as follows: A = Control 0 PS + 0 NPK, B = 0 PCO + 1 NPK, C = 1 PCO + 0 NPK, D = 1 PCO + ¼ NPK, E = 1 PCO + ½ NPK, F = 1 PCO + ¾ NPK, G = 1 PCO + 1 NPK, H = ¼ PCO + ¾ NPK, I = ½ PCO + ¾ NPK and J = ¾ PCO + ¾ NPK. The results showed that the highest nutrient uptake and residue was found in the treatment of 1 PCO + ¾ NPK. Relationship between N, P and K uptake with nutrient residue on the soil was detected. The N, P and K residues were influenced by the N, P and K uptake of chili plants of 92%, 98%, and 97%, respectively.Keywords: Chili, NPK, Liquid Organic Fertilizer, Residue, AbsorptionABSTRAKPenelitian ini bertujuan untuk mengetahui hubungan serapan N, P, dan K tanaman cabai terhadap residunya di dalam tanah yang diberi pupuk cair organik dengan pupuk anorganik N, P dan K. Penelitian dilaksanakan pada bulan September 2017 sampai dengan Januari 2018 di kebun percobaan dan Laboratorium KTNT Fakultas Pertanian, Universitas Padjadjaran. Rancangan yang digunakan adalah RAK sederhana dengan 10 perlakuan yang diulang 3 kali dengan susunan perlakuan sebagai berikut: A = Kontrol 0 PS + 0 NPK, B = 0 PCO + 1 NPK, C = 1 PCO + 0 NPK, D = 1 PCO + ¼ NPK, E = 1 PCO + ½ NPK, F = 1 PCO + ¾ NPK, G= 1 PCO + 1 NPK, H = ¼ PCO + ¾ NPK, I = ½ CO + ¾ PK dan J = ¾ PCO + ¾ NPK. Hasil penelitian menunjukkan bahwa serapan dan residu hara tertinggi ialah perlakuan F = 1 PCO + ¾ NPK. Terdapat hubungan antara serapan N, P dan K dengan residu hara pada tanah. Residu N, P dan K dipengaruhi oleh serapan N, P dan K tanaman cabai masing-masing sebesar 92% serapan N, 98% serapan P, dan 97% serapan K.Kata Kunci: Cabai, NPK, PCO, Residu, Serapan
Rancang Bangun Mesin Pembersih dan Pengupas Kentang
Authors: Sugandi Wahyu K. , Herwanto Totok , Yudi Ayuditha Putri
Published: July 2019

ABSTRACTEngineering of potatoes cleaning and peeling machineChips can be produced from varieties of raw materials including potatoes. To make potato chips on a large scale requires a machine that can facilitate all or one of the manufacturing processes. Therefore, research on the design of potatoes cleaning and peeler machine and its performance tests were required. The research method used was engineering method. The stages of this research were problem identification, data collection, designing, manufacturing and testing machine. This machine consisted of several components, namely frame unit, cleaning unit and peeler, and transmission unit. The mechanism of this machine was to put the water in and then turn on the motor connected to the brush and put the potato in. The potato will rotate and will hit the brush so that the skin peeled off. When the motor turned off, the faucet can be opened to remove the water. The lid on the tube can be opened to take the potato out. The engine design have a total dimension (1000 x 400 x 400) mm, height and diameter of the tube of 330 mm and 380 mm, using two cleaning brushes on one axis. with theoretical capacity of 152 kg/hour, actual capacity of 60 kg/hour.Keywords: cleaning and peeler machine, potato, cleaning brushABSTRAKKeripik dapat diproduksi dari berbagai macam bahan baku diantaranya kentang. Untuk membuat keripik kentang dalam skala yang besar dibutuhkan sebuah mesin yang dapat memudahkan semua atau salah satu proses pembuatannya. Oleh karena itu dibutuhkan penelitian mengenai rancang bangun mesin pembersih dan pengupas kentang serta uji kinerja mesin tersebut. Metode penelitian yang digunakan yaitu metode rekayasa. Tahapan penelitian ini yaitu identifikasi masalah, pengumpulan data, perancangan, pembuatan dan pengujian mesin. Mesin ini terdiri dari beberapa komponen yaitu unit rangka, unit pembersih dan pengupas, dan unit transmisi. Mekanisme kerja dari mesin ini yaitu memasukkan air lalu menyalakan motor yang terhubung dengan sikat lalu memasukkan kentang dimana kentang itu akan beruputar dan akan mengenai sikat sehingga kulit terkupas lalu motor dimatikan. Kran dapat dibuka sehingga air akan keluar, lalu jika tutup pada tabung dibuka, kentang dapat keluar. Hasil dari rancang bangun mesin memiliki total dimensi (1000 x 400 x 400) mm, tinggi dan diameter tabung masing-masing adalah 330 mm dan 380 mm, menggunakan dua buah sikat pembersih pada satu poros dengan kapasitas teoritis sebesar 152 kg/jam, kapasitas aktual sebesar 60 kg/jam,Kata kunci: Mesin pembersih, mesin pengupas kentang, sikat pembersih
Hubungan Bobot Isi dan Kemantapan Agregat Tanah dengan Biomassa Tanaman Jagung Manis dan Cabai Merah setelah diberikan Kombinasi Terak Baja dan Bokashi Sekam Padi pada Andisol, Lembang
Authors: Yulina Henly , Devnita Rina , Heryanto Rachmat
Published: July 2019

ABSTRACTRelationship between bulk density and soil agaregate stability on biomass of sweet corn and red chili after given combination steel slag and bokashi of husk on Andisol LembangThe objective of this research was to find out relationship between bulk density and soil agaregate stability on biomass of sweet corn and red chili after given combination steel slag and bokashi of husk on Andisol Lembang.This study used a Randomized Block Design Factorial with two factors. The first factor was steel slag and the second factor was bokashi of husk. Each of them consisted of 4 levels of 0%, 2.5%, 5.0% and 7.5% with two replications. The result of this research showed there was relationship between bulk density and soil agaregate stability on biomass of sweet corn and red chili, however only the biomass of red chili was influenced of bulk density and soil agaregate stability.Keywords: Steel slag, Bokashi of husk, Bulk density, Soil agaregate stability, Plant biomassABSTRAKPenelitian ini bertujuan untuk mengetahui hubungan antara bobot isi dan kemantapan agregattanah terhadap biomassa tanaman jagung manis dan cabai merah setelah diberikan kombinasi terakbaja dengan bokashi sekam padi pada Andisol Lembang. Penelitian menggunakan Rancangan AcakKelompok Pola Faktorial dengan dua faktor. Faktor pertama terak baja dan faktor kedua bokashisekam padi masing-masing 4 taraf yaitu 0%, 2,5%, 5,0%, dan 7,5%, diulang dua kali. Hasil penelitian menunjukkan bahwa terdapat hubungan antara bobot isi dan kemantapan agreagat tanahdengan biomassa tanaman jagung manis dan cabai merah, namun hanya biomassa tanaman cabaimerah yang dipengaruhi oleh bobot isi dan kemantapan agregat tanah.Kata Kunci: Terak baja, Bokashi sekam padi, Bobot isi, Kemantapan agregat, Biomassa tanaman
INTEGRATION OF SCIENCE IN SHAPING THE CHARACTER OF THE STUDENTS (From the Perpsective of Islamic Education)
Authors: Zein Muhammad
Published: July 2019

Religion and science cannot be separated from one to another. Both aspects rely on each other in order to develop. Constructively, the development of science and technology has led to the advance of the era in which has a positive impact to the human lives. Modern infrastructure like those on industrial facility, communication, and transportation simplify the mobility of the society.  This study explains about the integration of science in shaping the charters of the students in the perspective of Islam by using library research method. The library research method is also known as a the method of literature study.  The Islamic education in shaping the students' character in the competition of global era due to the impact of science and technology is very essential and cannot be denied from the social lives. In Islamic education, in order to achieve the success in the world than it has to be based on the science and vice versa. The Islamic education is a system which tries to implement the noble values of the students which include the aspects of knowledge, self –awareness, and application. Any activities that the teachers do should be able to influence the character of the students as a trigger to shape their personality. The Islamic education, in fact, has set the things relating to how the teachers behave, for instance, how they delivering their learning materials, tolerance, and some related matters. The purpose of this behavior is to shape the students to be a good human either in their society or country.
Aquí un amigo. Francisco García Gómez (1968-2019) In Memoriam
Authors: Pavés Gonzalo M.
Published: July 2019

En memoria de Francisco García Gómez, Pancho, profesore de la Universidad de Málaga fallecido a los 50 años.
La visión incompleta. El ver a medias como eje de producción artística
Authors: Castellano San Jacinto Tania
Published: July 2019

A partir de la lógica de la ambliopía, trataremos imágenes artísticas (fotografía, vídeo, instalación) que prescinden representativa o materialmente de ciertas partes. Esta “hemivisión” a la que dan lugar concilia la correcta visión con otra insuficiente en distintos grados, lo cual entabla relación directa con una óptica patológica. En este modo de ver, y por ende de crear, convive dialécticamente una parte de la realidad reconocible con otra anulada en diferentes formas. La deficiencia que presentan propone un modo aparte de abordar lo visible, en el que no se disimula o corrige la falta de definición, sino que ésta se asume y promueve como vía para ver otras cosas o de manera distinta. En este caso no se pretende ver mejor, sino integrar los límites perceptivos y trabajar productivamente a partir de ahí dentro del plano artístico. Todo ello cuestiona la realidad desde un punto de vista que admite fallas tanto en lo sensible como en lo expresable, la plantea como contingente y la aborda desde su imperfección implícita. Lejos de plantear obstáculos, estos aspectos son potenciados por determinada práctica artística, donde aparecen como capacitadores, generando sentidos y maneras de crear mundo.
Oscuridad, una estrategia fotográfica en el límite de su esencia para representar la periferia urbana
Authors: Pastor Andrés Gema
Published: July 2019

El paisaje urbano del cambio de siglo ha sido el tema predilecto de la fotografía artística de su tiempo. Su atención nos propone la reinvención personal y pública de los lugares comunes, pero además desentraña la esencia de las representaciones que lo dibujan.Este artículo analiza fotografías de lugares en la periferia nocturna de la ciudad, lugares que pasan desapercibidos pero que, sin embargo, han recibido la mirada minuciosa de los artistas. Su interés revela tanto el complejo juego de realidad y representación que es cada fotografía, como la reflexión e intervención política posible sobre esa realidad. Para comprender estas imágenes utilizamos una metodología basada en la definición de paisaje.Al profundizar en ellas descubriremos que tanto el paisaje como la fotografía lleva al extremo su esencia ontológica para zarandear los cimientos sobre los que se piensan, representan y ocupan esos lugares y esas representaciones.
El fracaso de la fotografía: una respuesta intermedial al programa fenomenológico de camera lucida de Roland Barthes
Authors: Lèal Alfredo
Published: July 2019

El presente artículo pretende dar cuenta de las limitantes de la propuesta teórica de Roland Barthes para analizar la fotografía en tanto ésta se considere a la luz del programa fenomenológico del filósofo francés. Dada la importancia de la teoría de Barthes en el campo de la fotografía, creemos  que dichas limitantes sólo son perceptibles si el programa de Barthes se lee desde una postura intermedial, es decir, desde la relación que la fotografía —en tanto re-presentación material de la realidad— presupone y desarrolla en torno a sí con respecto a instancias histórico-mediáticas que se encuentran en contradicción a las esencias regionales reconocidas por Barthes, tal como lo intentamos hacer en el presente trabajo. De esta forma, la fotografía se presenta como un suplemento que pretende colmar, materialmente, la realidad. Un suplemento que, tanto en su constitución como en sus consecuencias, se basa en un sustrato metafísico, a saber, el aparecimiento absoluto o absoluto aparecimiento del objeto fotografiado.
El cine de Mar Coll: herencias catalanas de Eric Rohmer
Authors: Martín Sanz Álvaro
Published: July 2019

El presente artículo realiza un breve recorrido a través de la filmografía de Mar Coll, desconocida ganadora de un premio Goya como representante de toda una generación de cineastas catalanas mujeres que trabajando desde Barcelona luchan por salir de la invisibilidad. Así pues, se plantea un estudio del contenido narrativo de las obras que componen la filmografía de Mar Coll (La última polaroid, Tres días con la familia y Todos queremos lo mejor para ella) para, mediante un análisis comparativo de estas con las del cineasta de la Novelle Vague Eric Rohmer, ver cómo la influencia que la catalana recoge del francés acaba determinando las múltiples formas que caracterizan su estilo cinematográfico. Así, partiendo de un relato que se teje desde la sensibilidad de sus personajes, el cine de Coll conjuga toda una propuesta formal que se adapta a las circunstancias de los conflictos de su universo narrativo, creándose un estilo diferenciado caracterizado por toda una serie de planteamientos cinematográficos tanto recurrentes como reconocibles.
La fotografía, interpretaciones históricas en la prensa española (1839-1900). Reseña de Juan-Francisco Torregrosa Carmona
Authors: Sánchez Vigil Juan Miguel
Published: July 2019

Reseña del libro de Juan Miguel Sánchez Vigil (2018). La fotografía, interpretaciones históricas en la prensa española (1839-1900). Madrid: Consejo Superior de Investigaciones Científicas.
The Effect of Eight Thermal Protectants on the Survival Rate and the Viable Counts of Lactobacillus casei After Heat Treatment in Fermented Goat Milk
Authors: Zheng Qiqi , Shu Guowei , Kou Jianbo , Cui Xiuxiu , Meng Jiangpeng
Published: July 2019

In order to improve the survival rate of probiotics and produce probiotic goat milk from fermented goat milk of Lactobacillus casei L61 by spray drying. Spray drying has been applied to large-scale industrial production of milk powder due to its high efficiency and low cost. However, high temperatures in spray drying can result in the loss of large numbers of probiotic.The purpose of this paper is to study the effects of eight thermal protectants including skim milk, sucrose, glucose, β-cyclodextrin, gelatin, maltodextrin, glycerol, trehalose on the survival rate and viable counts of L.casei L61 after heat treatment by the single factor experiment. All protective agents have a positive effect on increasing the survival rate of L.casei L61 (p<0.05). The results indicated that the survival rates of L.casei L61 were up to the maximum of 10.94%, 1.13%, 3.04%, 0.21%, 6.97%, 0.075, 4.71% and 0.29%, while the additions of skim milk, sucrose, glucose, β-cyclodextrin, gelatin, maltodextrin, glycerol, trehalose were 20mg/L, 10%, 7%, 15%, 1.5%, 3%, 8mL/L, 10%, respectively; the viable counts after heat treatment are 19.69, 0.81, 1.78, 0.455, 12.2, 0.12, 2.75, 0.435(×106CFU/mL), respectively. This paper provides technical a reference for the development of probiotic goat milk powder.
Variation in Nutritional Properties of Mango (Mangifera indica) Juice Based on Varietal Difference and Thermal Holding Time
Authors: Jolayemi Olusola Samuel
Published: July 2019

This research demonstrated the significance of variety and thermal holding time (THT) at constant temperature (95 °C) on quality characteristics of mango juice. Eighteen samples from Mado, Julie and Kent mango varieties were produced using full factorial design. Quality parameters, sensory and microbial properties were determined. Variety and THT were significant for most notable variables considered except for some sensory properties. Juice of Julie had the highest vitamin C at 60s, while Mado were superior in virtually all other chemical parameters; having 31.93 – 49.97 µg/100g pro-vitamin A, 51.10 – 113 mg/100g total phenol, 25.60 – 81.40 mg/100g total flavonoid, 1.26 – 1.48 mg/L tannin and 12.60 – 13.60% °Brix. Microbial qualities were influenced by THT; with 60s long enough to achieve stable products. PCA cluster analysis further emphasized variety as the most quality-determining factor in mango juice.
Synthesis, characterization and antibacterial susceptibility testing of manganese complexes of doxycyline with bipyridine and phenanthroline
Authors: Obaleye Joshua A. , Abosede Olufunso O.
Published: July 2019

Three manganese complexes of the antibiotic doxycyline viz.: manganese doxycyline, [MnDox2]Cl2‧2H2O (1), and manganese doxycyline with bipyridine, [MnDox2(bpy)]Cl2‧8H2O (2), and phenanthroline, [MnDox2(phen)]Cl2‧8H2O (3), as the ancillary ligand were synthesized and characterized by FT-IR, elemental analysis and electrospray mass spectroscopy. The three complexes show good solubility in DMF and DMSO. Data obtained from spectroscopic techniques used show that doxycycline coordinates to the central manganese atom through the oxygen of the amide group and the carbonyl oxygen atom of ring A while bipyridine/phenanthroline coordinates through the two diimine nitrogen atoms. The stoichiometry of manganese-doxycycline is 1:2 and octahedral geometry is the preferred coordination in all the complexes.
Solutions of the Dirac Equation in a Bardeen Black Hole Geometry
Authors: Sporea Ciprian A.
Published: July 2019

In this paper we study the Dirac equation in the geometry of a (regular) Bardeen black hole. We will focus on finding new analytical solutions in the vicinity of the black hole horizon. These solutions can be used with the asymptotic solutions (derived in a previous paper) to compute numerical phase shifts that define the scattering amplitudes.
The Hardening in Alloys and Composites and Its Examination with a Diffraction and Self-Consistent Model
Authors: Gadalińska Elżbieta , Baczmański Andrzej , Wroński Sebastian , Wróbel Mirosław , Scheffzük Christian
Published: July 2019

The paper presents the results of diffraction stress measurement in Al/SiC composite and in 2124T6 aluminum alloy during the in situ tensile test. The main aim of the work is to observe the stress values for different stages of tensile test for the composite after applying two types of thermal treatment and for the alloy used as a matrix in this composite, to identify the type of hardening process. The experimental results were compared against the calculations results obtained from the self-consistent model developed by Baczmański [1] - [3] to gain the information about the micromechanical properties (critical resolved shear stress τcr and hardening parameter H) of the examined materials. This comparison allowed researchers to determine the role of reinforcement in the composite as well as the impact of the heat treatment on the hardening of the material.
Evaluation of Impact Damage in Composite Structures Using Ultrasonic Testing
Authors: Wronkowicz-Katunin Angelika , Dragan Krzysztof
Published: July 2019

Barely visible impact damage is one of the problems commonly occurring in composite elements during an aircraft operation. The authors described the mechanisms of impact damage formation and propagation in composite structures. The paper presents a performed analysis of an influence of impact parameters on the resulting damage, i.e. its detectability by means of visual observation as well as its extent determined based on ultrasonic tests results. The tests were conducted on the CFRP specimens with a wide range of impact damage cases obtained with combinations of variable impact energy and shapes of impactors. Additionally, an algorithm based on image processing and image analysis methods is proposed for the purpose of the effective evaluation of the ultrasonic data obtained.
Accumulation of Fatigue Microdefects– Entropy Interpretation
Authors: Szafran Krzysztof , Delas Nikolaj
Published: July 2019

The authors of the paper presented some of the models describing the process of micro-cracks’ development. In this study, the process of a selected model of micro-cracking was analyzed. In the model it was assumed that the damage to the material has some “thermodynamic properties” or rather universal properties inherent in most complex systems. In order to calculate the long-term fatigue strength properties of a structure, it is important to have a good understanding of the distribution parameters of the number of defects of different sizes. A model was built using the entropy principle, which is effectively used to test complex systems that are difficult to formalize. As a result of many experimental studies it was found that the development of fatigue damage is closely related to the process of plastic deformation of the material at the contact point of local defects. The results of computer calculations and simulations led to the conclusions presented in the final part of this paper.
Modelling, analysis and control design of hybrid dynamical systems
Authors: Vošček Dominik , Jadlovská Anna , Grigl’ák Dominik
Published: July 2019

This paper introduces a methodology for one of the challenges regarding cyber-physical systems, ie modelling and control design them as hybrid systems. The proposed methodology comprises modules with specific steps to accomplish the tasks. Specifically, the paper aims to utilize hybrid systems framework onto the chosen hydraulic hybrid system with complex dynamics to showcase different aspects of hybrid systems. The mathematical model was derived using hybrid automata framework and then transformed into the linear form either using Jacobi matrices or using linear approximations without Jacobi matrices. After that the system was validated and analysed and the control design utilizing piecewise linear-quadratic regulator optimal control was proposed. Furthermore, parameters of control algorithm were tuned using particle swarm optimization algorithm. The whole logic, system dynamics and constrains are implemented within MATLAB/Simulink simulation environment using s -functions. The proposed methodology can be implemented on the various types of cyber-physical systems as far as they can be described as hybrid systems.
Metamaterial superstrate microstrip patch antenna for 5G wireless communication based on the theory of characteristic modes
Authors: Hamad Ehab K. I. , Abdelaziz Ahmed
Published: July 2019

Metamaterials (MTMs) have received considerable attention due to their novel electromagnetic properties. Their applications include enhancing gain and bandwidth in microstrip antennas. In this article, a dual band microstrip antenna design based on characteristic mode analysis (CMA) using MTM superstrate is proposed for 5G wireless communication. The CMA is used for the modelling, analysis and optimization of the proposed antenna to examine the underlying modal behaviour of the MTM unit cell and to guide mode excitation. The antenna structure consists of a microstrip feed line connected to a rectangular patch. Then triangular split ring resonator unit cell is inserted on the ground of a traditional patch antenna that resonates at 15 GHz to produce additional resonance at 10 GHz. A planar array of 2 × 3 triangle MTM unit cells is used as superstrate to improve the gain and bandwidth at both resonances simultaneously. The optimal distance between MTM superstrate and the antenna patch is determined using the Fabry-Perot cavity theory to maximize power directivity and efficiency of the proposed antenna. The CST microwave studio software is used to model and optimize the proposed antenna. A prototype of the designed antenna that was fabricated showed good agreement between measurement and simulation results.
Optimization of surface-mounted permanent magnet brushless AC motor using analytical model and differential evolution algorithm
Authors: Mohamed Mohd Rezal , Ishak Dahaman
Published: July 2019

This paper discusses the optimization of surface-mounted permanent magnet brushless AC (PMBLAC) motor using Analytical Sub-domain model with Differential Evolution Algorithm (ASDEA). Only two regions were considered in this analytical sub-domain model, ie magnet and airgap regions, with assistance of Complex Relative Permeance Function (CRPF) to account for the stator slotting effect. Five machine parameters were chosen to be optimized, namely the magnet arc-pole-pitch ratio, slot opening width, magnet thickness, airgap length and stator inner radius. The optimization process has four objectives, ie minimum torque ripple, low cogging torque, high efficiency, and high output torque. The results from the optimized ASDEA were compared with the Analytical Sub-domain Genetic Algorithm (ASGA) and further validated against 2-D finite element model (FEM). Results show a good agreement between analytically optimized models and finite element model. The ASDEA has faster computational time compared to ASGA, and this provides benefit in terms of reducing the machine design parameterization time and less redundancy work required to achieve motor design specifications.
A novel temperature controller for in-situ measurement of radiation-induced changes in temperature effects on space electronics
Authors: Haze Jiri , Hofman Jiri
Published: July 2019

The paper discusses a novel temperature controller and a related test method allowing in-situ measurement of total ionising dose-induced changes in the impact of temperature on electronic devices for space applications. Various results of pilot radiation experiments (testing commercial PMOS transistors, RADFETs, and voltage references) are also presented.
Wireless channel estimation in OFDM systems based on collaborative filtering techniques
Authors: Švedek Velimir , Kurdija Adrian Satja , Ilić Željko
Published: July 2019

In this paper, a new channel estimation algorithm in Orthogonal Frequency Division Multiplexing (OFDM) systems is proposed. The proposed algorithm is suitable for cases with low density of pilot sub-carriers, where standard interpolation methods (linear, second order and cubic spline interpolation) are inaccurate. The algorithm improves the interpolation methods by employing memory based collaborative filtering (CF) techniques which are less sensitive to the number and location of the pilot subcarriers. CF algorithms are usually used in the context of recommender systems (e-commerce) for predictions of the unknown user-item ratings based on known values of similar users. The advantage of CF is the ability to e ciently produce quality predictions with highly sparse data. Computer simulations are used to verify the proposed channel estimation algorithm and demonstrate that the proposed algorithm improves predictive accuracy metrics, such as Root Mean Squared Error (RMSE), compared to usual estimation methods.
Evaluation of Three Esthetic Restorative Materials Used for Carious or Noncarious Cervical Lesion Restoration
Authors: Beresescu Gabriela , Tegla Emanuela , Temistocle Despina , Ormenisan Alina , Baldean Alina
Published: July 2019

Background: Cervical lesions appear on the cervical surface of the lingual or buccal side of the tooth and are classified into carious and non-carious lesions.

Aim: The present study evaluates the performance of three different types of aesthetic restorative materials, used for the restoration of carious or non-carious cervical lesions.

Materials and methods: The study comprised 195 cervical lesions in 45 patients. The restorations were carried out for non-carious cervical lesions in 34.62% of the cases, for primary carious lesions in 40.00% of the cases, and to replace a previous restoration in 25.38% of the cases. The restorations were evaluated at 2 weeks (the reference line), and then at 1 and 2 years after placement. The following have been assessed: restoration retention, color harmonization, surface texture, margin discoloration, anatomical contour, margin integrity, and the presence of secondary caries. The characteristics were registered in conformity with the modified USPHS criteria.

Results: At the one-year evaluation, we noticed the loss of 12 restorations, and after 2 years, the loss of 19 restorations. The results showed significant differences between restorative materials regarding color, margin adaptation, margin coloration, surface texture, as well as criteria regarding the anatomical contour (p <0.05).

Conclusions: The evaluation of the success of restorative material retention must consider the location of the cervical lesion. A successful treatment depends particularly on a full understanding of the factors that caused the lesions and on the method of their treatment.
Low Level of Physical Activity in Two Roma Subgroups Compared to Non-Roma Population in Niraj Valley, Transylvania
Authors: Szabó Monica I. , Balázs Anita , Máté Beáta , Kelemen Piroska
Published: July 2019

Objective: A low level of physical activity is a cardiovascular risk factor. Physical activity patterns may differ among different ethnic groups.

Aim of the study: Our aim was to evaluate the physical activity patterns of two different Roma populations compared to non-Roma.

Material and Methods: The study population included 231 Gabor Roma, 111 Băieși Roma, and 183 non-Roma. A 70-item questionnaire was administered, including also the short form of the International Physical Activity Questionnaire, evaluating daily physical activity in minutes and physical activity categories such as walking, gardening, household activity, and sports. Anthropometric parameters (weight, height, waist and hip circumference) were measured.

Results: The level of physical activity was the lowest among Gabor Roma and was lower in both Roma groups than in non-Roma (Gabor Roma 118.6 ± 91.1 min/day, Băieși Roma 207.55 ± 172.1 min/day, and non-Roma 234.12 ± 167.3 min/day). Both Roma groups had significantly lower percentages of gardening and sport activities compared to non-Roma. Women had a higher level of daily physical activity than men in the Gabor Roma population (144.22 ± 109.4 min/day vs. 79.71 ± 58.2 min/day, p = 0.001). In the two other groups the differences were not statistically significant.

Conclusions: Both Roma groups had significantly lower levels of daily physical activity, with differences between genders. Both Roma groups were lesser engaged in sports and gardening than non-Roma subjects.
The Role of Pedobarography and Therapeutic Padding in the Management of Hyperkeratosis due to Mechanical Stress
Authors: Chiriac Anca , Podoleanu Cristian , Năznean Adrian , Stolnicu Simona
Published: July 2019

Hyperkeratotic lesions result from continuous mechanical action on the skin forming a callus or a corn. The accumulation of horny layers will increase pressure, creating a vicious cycle. We present a new approach based on relieving pressure or friction, strictly based on the results of pedography (pedobarography).
Coronary Shear Stress after Implantation of Bioresorbable Scaffolds – a Modern Interdisciplinary Concept at the Border between Interventional Cardiology and Cardiac Imaging
Authors: Păsăroiu Dan , Parajkó Zsolt , Ferenţ Ionuţ , Opincariu Diana , Benedek Annabell
Published: July 2019

Bioresorbable scaffolds/stents offer new and exciting perspectives in the treatment of patients with acute coronary syndromes, especially after the recent development of invasive imaging techniques, such as optical coherence tomography, which allow complete assessment of vascu-lar segments. A particular advantage of bioresorbable scaffolds is that once the biosorption of the scaffold is complete, the vascular segment regains its normal physiological functions, thus eliminating the risk of late complications. New studies show the importance of shear stress in the progression of vascular atherosclerosis or in accelerating endothelial turnover. Based on the current knowledge in this field, a future standardized determination of shear stress may help in the long-term follow-up of patients that have suffered or are at risk of developing an acute coronary syndrome.
Association of overweight and obesity with cardiovascular risk factors in patients with atherosclerotic diseases
Authors: Maksimovic Milos , Vlajinac Hristina , Radak Djordje , Marinkovic Jelena , Maksimovic Jadranka , Jorga Jagoda
Published: July 2019

Background

The aim of this study was to compare demographic, clinical and biochemical characteristics, including inflammatory markers, according to the nutritional status of patients with verified atherosclerotic disease.

Methods

This cross-sectional study involved 1045 consecutive patients with verified carotid disease or peripheral arterial disease (PAD). Anthropometric parameters and data on cardiovascular risk factors and therapy for hypertension and hyperlipidemia were collected for all participants.

Results

Carotid disease was positively and PAD was negatively associated with body mass index (BMI). Negative association between obesity and PAD was significant only in former smokers, not in current smokers or in patients who never smoked. Overweight and general obesity were significantly related to metabolic syndrome (p < 0.001), lower values of high – density lipoprotein cholesterol (p < 0.001), increased triglycerides (p < 0.001), hyperglycemia (p < 0.001), self-reported diabetes (p < 0.001), hypertension (p < 0.001), high serum uric acid (p < 0.001), increased high sensitivity C-reactive protein (p = 0.020) and former smoking (p = 0.005) after adjustment for age, gender and type of disease. Antihypertensive therapy seems to be less effective in patients who are overweight and obese.

Conclusions

In conclusion, overweight and general obesity were significantly related to several cardiovascular risk factors.
Preoperative lymphocyte-to-monocyte ratio versus platelet-to-lymphocyte ratio as a prognostic predictor for non-small cell lung cancer patients
Authors: Yan Haixi , Cai Linling , Chen Shuaishuai , Li Jun
Published: July 2019

Background

We investigated the prognostic value of the preoperative lymphocyte-to-mononuclear ratio (LMR) and platelet-to-lymphocyte ratio (PLR) in a large cohort of patients with non-small cell lung cancer (NSCLC).

Methods

Clinical-pathological data from 507 NSCLC patients at Taizhou Hospital of Zhejiang Province between 2010 and 2016 were retrospectively evaluated. X-tile software was used to assess the optimal cutoff levels for LMR and PLR. Univariate and multivariate Cox regression models were used to assess the prognostic factors.

Results

The median follow-up duration after surgical resection was 34.5 months. Patients were stratified into 2 groups by LMR (2.6 and = 2.6) and PLR (179.6 and = 179.6). Our results revealed that lower LMR (HR = 3.163 (1.821–5.493), P = 0.000), age (HR = 2.252 (1.412–3.592), P = 0.001), T stage (HR = 3.749 (2.275–6.179), P = 0.000), N stage (HR = 3.106 (1.967–4.902), P = 0.000), and cut edge (HR = 3.830 (1.077–13.618), P = 0.038) were considered to be independent indicators for overall survival (OS) of NSCLC patients. For disease-free survival (DFS), age, sex, T stage, N stage, LMR and cut edge were verified to be independent prognostic factors in patients with NSCLC.

Conclusions

In the study cohort, reduced LMR was a robust independent predictor for both OS and DFS in patients with NSCLC who underwent surgical resection.
Lipid status association with 25-hydroxy vitamin D: Cross sectional study of end stage renal disease patients
Authors: Milinković Neda , Sarić Marija , Jovičić Snežana , Mirković Duško , Ležaić Višnja , Ignjatović Svetlana
Published: July 2019

Background

Some observational studies indicate an association of 25-hydroxy vitamin D (25(OH)D) insufficiency and atherogenic cholesterol concentrations. The aim of this study was to investigate relationship between 25(OH)D concentrations and lipid parameters in end stage renal disease (ESRD) patients, separately for predialysis, hemodialysis and peritoneal dialysis patients.

Methods

We have adjusted 25(OH)D concentrations for seasonal variability with cosinor analysis, and performed all further analysis using these corrected 25(OH)D concentrations. Concentrations of 25(OH)D and the lipid parameters were determined in 214 ESRD patients and 50 control group participants. The analysis included the measurement of 25(OH)D by HPLC, apolipoprotein (Apo) AI, ApoB and Lp(a) by nephelometry, total cholesterol (TC), high-density lipoprotein cholesterol (HDL-C), low-density lipoprotein cholesterol (LDL-C) and triglyceride (TG) by spectrophotometry and manually calculated ApoB/ApoAI and LDL-C/HDL-C ratio.

Results

ESRD patients with adjusted 25(OH)D concentrations of ≤ 50 nmol/L had significantly higher TC (P = 0.005) and ApoAI (P = 0.049). Significantly higher HDL-C (P = 0.011) and ApoAI (P = 0.020) were found in hemodialysis patients with the 25(OH)D concentrations of ≤ 50 nmol/L. The other analyzed lipid parameters differed significantly between predialysis, hemodialysis and peritoneal dialysis patients with 25(OH)D concentrations of < 50 nmol/L.

Conclusions

Our study indicate the significant relationship between 25(OH)D repletion and optimal concentrations of lipid parameters in ESRD patients. Further research is necessary to explain whether joint evaluation of vitamin D status and lipid abnormalities could improve cardiovascular outcome in ESRD patients.
Influence of selenium supplementation on carbohydrate metabolism and oxidative stress in pregnant women with gestational diabetes mellitus
Authors: Saifi Hadjer , Mabrouk Yassine , Saifi Rayane , Benabdelkader Messaouda , Saidi Mouldi
Published: July 2019

Background

In the presence of conflicting advice about the relationship between selenium-type II diabetes-oxidative stress trio, this study aimed to assess the consequences of selenium supplementation on fasting plasma glucose (FPG) level, antioxidant activities of selenodependent and non-selenodependent enzymes, and other markers of oxidative stress studied for the first time during gestational diabetes mellitus (GDM).

Methods

This research was carried out among 180 pregnant Algerian women, 60 of whom were in good health, 60 women with GDM did not take supplements, and 60 women with GDM took selenium orally (50 μg/d) for 12 weeks starting from their second trimester of pregnancy. Blood samples were taken in order to assay FPG level and oxidative stress markers.

Results

Selenium supplementation during GDM has demonstrated its hypoglycemic power in the significant decline of FPG level, and its antioxidant properties in the significant reinforcement of antioxidant activities of erythrocyte selenodependent enzymes (glutathione peroxidase and glutathione reductase), the significant increase in erythrocyte catalase and superoxide dismutase activities simultaneously with the highest decrease in erythrocyte and plasma malondialdehyde levels. This decrease was only significant for plasma carbonyl proteins, which was not the case for erythrocyte carbonyl proteins.

Conclusions

The recourse to selenium supplementation by seleno-deficient pregnant women with GDM is beneficial for maternal health. This micronutrient exploits its antioxidant and insulin-mimetic properties in the maintenance of blood glucose homeostasis and the fight against oxidative stress, and consequently, its supplementation delays the occurrence of GDM complications.
Carl F. H. Henry on the Problem of (Good and) Evil
Authors: Martin Edward N.
Published: July 2019

Carl Henry devotes a few chapters directly (and a few indirectly) in volume 6 of his God, Revelation, and Authority [GRA] to the problem of evil [POE]. The author examines Henry’s contribution as a theologian, noting that GRA is a work of theology, not philosophy proper. However, Henry had a PhD in Philosophy (Boston, 1949), and one finds present several presuppositions and control beliefs that are philosophically motivated. Observation of the text reveals several of these. Chief here is Henry’s working assumption that to understand and explain the nature of evil, one must first understand and explain the nature, origin and etiology of good. This point and its implications are developed at length in this article. Unsurprising is Henry’s contribution exhibiting an awareness of methods and theodical approaches traditionally used by philosophers of religion such as Rowe, Plantinga, and Hick. Surprising is the fact that Henry does not clearly take a side on the nature of human free will. What he does say seems to underdetermine his exact position. Finally, the importance of Kant vis a vis Henry’s theodicy and entire theological program is emphasized as well.
The Uneasy Pulpit: Carl Henry, the Authority of the Bible, and Expositional Preaching
Authors: King Kevin
Published: July 2019

It has been asserted that preaching in the first half of the twenty-first century is in crisis by the authors of Engaging Preaching. This crisis has arisen, so say the authors, due in part to those who have been entrusted to preach the ‘oracles of God’ (1 Peter 4:11), having failed to faithfully proclaim the Word of the Lord. No longer do the words of ‘Thus saith the Lord’, regularly fill the halls of the sanctuary. Instead of a sure word from the Bible, those in attendance are just as likely to give tips on self-fulfillment or achieving one’s dreams. By this practice, it seems there are a significant number of pulpit practitioners who neither trust in the authority or the sufficiency of the Word of God. The situation seems bleak, but there is a remedy to be applied to this situation. Carl F. H. Henry has left us a wealth of theological writings that speak to this very problem. This paper will argue as Henry has masterfully argued for the authority of Scripture, the preacher finds a sure footing for a pulpit practice that displays the authority and the sufficiency of the Bible. It will be argued that expositional preaching is the most natural response to a robust view of the authority and sufficiency of the Word of God.