bluuebunny/crossref_metadata_2025_split huggingface dataset:
From chaos to order. Difference equations in one ecological problem
Authors: Kamenev Georgy K. , Lyulyakin Oleg P. , Sarancha Dmitry A. , Lysenko Nikolai A. , Polyanovsky Valery O. 
Published: October 2016

AbstractIn this paper we consider properties of the difference equations (discrete mappings) obtained in the study of the population dynamics of lemmings. A bifurcation scenario is proposed for obtained equations. Certain stability zones appear under this scenario with periods varying in order of natural series and also zones with more complicated modes. The study of transitional zones (‘ordering of the chaos’) is performed with the use of analytic calculations and computational experiments. Numerical analysis of mappings uses the methods of approximation of implicitly specified sets allowing us to construct and visualize sets of ‘resonance’ parameters including the front of the so-called singularity of ‘blue sky’.
Study of solutions of a continuous-discrete model of HIV infection spread
Authors: Pertsev Nikolay V. 
Published: October 2016

AbstractEquations of a continuous-discrete mathematical model describing the propagation of HIV infection among the population of several regions are presented. The model equations take into account the reproduction and migration of the population, the risk of infection of individuals from different social groups, an impulse change in the number of individuals at discrete time moments under the action of various factors. The results of the study of the model solutions are also presented. We obtain conditions for the model parameters and initial data that provide the existence of solutions interpreted as full eradication of HIV infection in all considered regions or maintenance of sizes of groups of infected individuals at some acceptable level. The solutions analysis uses the monotone operators method and properties of nonsingular M-matrices.
The Evolution of the Regional Development Policies
Authors: Popescu Constanţa , Ristea Ana Lucia , Popescu Constantin 
Published: October 2016

Abstract
Kuklinski (Kuklinski A. 1987), realized, from an epistemological perspective, a history of the international and interdisciplinary progress in matters of regional policy.
According to the authors’ conception, an international scientific movement in the domain of regional studies refers to: the examination of the regional studies carried out in different countries to identify the diversity of ideological and intellectual attitudes, the techniques and the motivations.
Today this phenomenon must be considered from a new perspective in the framework of a global analysis of the different scientific schools which perceive regional studies in particular and original ways.
A scientific school can be defined as all the activities of a well-organized team, capable of producing, in the course of a long period, a series of relatively important and diversified innovations in three domains:

a)
theory and research methods;

b)
empirical knowledge of the existing reality;

c)
creation of tools and policies in order to transform this reality according to the development goals accepted by a determined epoch and in a determined region.

The main feature of a scientific school is represented by its capacity to innovate a series of theoretical and empirical studies (Kuklinski A. 1987).
The Effects of Motivation on Employees Performance in Organizations
Authors: Robescu Ofelia , Iancu Alina-Georgiana 
Published: October 2016

Abstract
Society since ancient times faced with a weak involvement of human resources in organizations. Therefore motivating employees became today an important objective for organizations that want to remain viable on the market today. Motivation of human resources in the organization will bring extra performance to the manager that hopes to reach the organization's goals.
Foreign Direct Investments, Open Source to Increase the Participation of Romania within Global Production Networks
Authors: Constantinescu Lucreţia Mariana 
Published: October 2016

Abstract
The transactions into the international trade of services, today, represent a major component of the international flows of values. This work aims a brief analyze of the Foreign Direct Investments flows’ evolution of the Romanian services economy in terms of volume (as value) and dynamics during the post-crisis years that highlight the Romanian modern economy participation within the global and European production networks level” after 2013 year.
The Place and Role of Information System in Exercising the Financial Control
Authors: Radu Florin , Giju Ciprian , Tăbîrcă Alina Iuliana 
Published: October 2016

Abstract
Considering the technological and economic changes over the years, we have found that we are currently witnessing an increase in the information system in the future. In fact, it is found that the information domain has known divergence over time, significantly in practice. Therefore, it is not surprising that the academic recommendations are rarely adopted by practitioners in response to this problem, so it is suggested in the future a turn towards the practice.
Selected small molecules as inductors of pluripotent stem cells
Authors: Baranek Małgorzata , Markiewicz Wojciech T , Barciszewski Jan 
Published: October 2016

The general idea of regenerative medicine is to fix or replace tissues or organs with alive and patient-specific implants. Pluripotent stem cells are capable of indefinite self-renewal and differentiation into all cell types of body with origin from the three germ layers of the developing embryo, therefore they have a potential to play a substantial role in regenerative medicine. Easily accessible source of induced pluripotent stem cells may allow obtaining and culturing tissues in vitro. Many improvements in the methods leading to obtain such cells have been made by various research groups in order to limit immunogenicity and tumorigenesis, increase efficiency and accelerate kinetics. One of the approaches affecting pluripotency is usage of small molecule compounds including RNA-derivatives – nucleosides analogues. It would be great to assess general character of such molecules and reveal their new derivatives or modifications to improve induced pluripotent stem cells (iPSCs) reprogramming efficiency. Understanding the epigenetic changes during cellular reprogramming will extend understanding of stem cell biology and lead to potential therapeutic approaches. In this digest of compounds found in literature as proven or putative inductors of cells’ reprogramming to pluripotency there are compounds that may substitute for transgenic nucleic acids delivery in order to improve time and efficiency of reprogramming. Nucleic acids’ derivatives or modifications of particular atoms or substitutes influence modulating activities of small molecules, especially their inhibiting activity. Due to dosage-dependent effect of small molecules influence on genes, their application concentration needs to be strictly determined.
A Novel Rat Model of Polymicrobial Peri‐Implantitis: A Preliminary Study
Authors: Koutouzis Theofilos , Eastman Christie , Chukkapalli Sasanka , Larjava Hannu , Kesavalu Lakshmyya 
Published: October 2016

Background: Peri‐implantitis is a complex polymicrobial biofilm‐induced inflammatory osteolytic gingival infection that results in orofacial implant failures. To the best knowledge of the authors, there are no preclinical in vivo studies in implant dentistry that have investigated the inflammatory response to known microbial biofilms observed in humans. The aim of this study is to develop a novel peri‐implant rat model using an established model of polymicrobial periodontitis.Methods: Wistar rats were used for the study of experimental peri‐implantitis. One month after extraction of maxillary first molars, a titanium mini‐implant was inserted. Two months after implant healing, implants were uncovered, and abutment fixing was done using cyanoacrylate to prevent abutment loosening. Rats were separated into two groups (group A: polymicrobial‐infected and group B: sham‐infected). One week after healing of abutments, rats were infected with Porphyromonas gingivalis, Treponema denticola, and Tannerella forsythia for 12 weeks. Bacterial colonization, bone resorption, and implant inflammation were evaluated by polymerase chain reaction (PCR), microcomputed tomography, and histology, respectively.Results: Three rats with four implants in the infection group and two rats with three implants in the sham‐infection group were analyzed. PCR analysis revealed presence of bacterial genomic DNA, and infection elicited significant immunoglobulin (Ig)G and IgM antibody responses, indicating bacterial colonization/infection around implants. Infection induced an enhanced mean distance from implant platform to the first bone‐to‐implant contact, extensive peri‐implantitis with advanced bone resorption, and extensive inflammation with granulation tissue and polymorphonuclear leukocytes.Conclusions: To the best knowledge of the authors, this is the first study to develop a novel rat model of polymicrobial peri‐implantitis. With modifications to improve implant retention it could offer significant advantages for studies of initiation and progression of peri‐implantitis.
Interaksi Belajar Matematika Siswa Dalam Pembelajaran Kooperatif Tipe STAD
Authors: Afifah Dian Septi Nur 
Published: October 2016

Kurikulum Tingkat Satuan Pendidikan menuntut siswa untuk bersikap aktif, kreatif dan inovatif. Namun dalam pelaksanaannya menunjukkan adanya kekurangan pada praktek pembelajaran. Salah satu pembelajaran yang melibatkan siswa aktif adalah pembelajaran kooperatif. Dalam pembelajaran kooperatif siswa saling berinteraksi satu sama lain dalam kelompok untuk bekerja sama dalam menyelesaikan tugas. Interaksi belajar siswa dalam pembelajaran kooperatif tipe STAD dapat dibedakan menjadi dua yaitu interaksi belajar siswa dalam tugas dan interaksi siswa di luar tugas. Tujuan dari penelitian ini adalah mendeskripsikan interaksi belajar matematika siswa dalam pembelajaran kooperatif tipe STAD. Jenis penelitian ini adalah penelitian deskriptif dengan pendekatan kualitatif. Penelitian ini dilaksanakan di kelas VIII-A SMP N I Modo Lamongan dengan jumlah siswa 33 orang. Data interaksi belajar siswa dalam kelompok diperoleh dengan lembar observasi dan rekaman handycam. Berdasarkan analisis data, dapat disimpulkan bahwa interaksi belajar matematika siswa dalam pembelajaran kooperatif yang terjadi dalam menyampaikan ide atau pendapat yaitu sebesar 34,4% untuk kelompok 1 dan 32,3% untuk kelompok 2, memberi bantuan yang disertai dengan penjelasan sebesar 15,6% untuk kelompok 1 dan 20,6% untuk kelompok 2, memberi bantuan tanpa disertai dengan penjelasan sebesar 25,0% untuk kelompok 1 dan 20,6% untuk kelompok 2 dan interaksi belajar matematika siswa dalam meminta bantuan sebesar 25,0% untuk kelompok 1 dan 26,5% untuk kelompok 2.
Kolaborasi Metode Ceramah, Diskusi dan Latihan Pada Materi Perkembangan Teknologi Untuk Meningkatkan Prestasi Belajar
Authors: Maski Maski 
Published: October 2016

Metode pembelajaran adalah cara yang digunakan guru dalam mengadakan interaksi antara guru dengan siswa. Setiap metode pembelajaran memiliki kelebihan dan kelemahan masing-masing. Oleh karena itu, dalam praktek pembelajaran mustahil menggunakan satu metode saja. Kombinasi (kolaborasi) penggunaan beberapa metode merupakan keharusan dalam praktek pembelajaran. Terkait dengan parktek pembelajaran di kelas, peneliti selaku guru kelas mengalami permasalahan dalam pelajaran IPS mendeskripsikan materi “Perkembangan Teknologi” pada siswa kelas IVB yang berdampak pada rendahnya prestasi siswa. Penyebab kegagalan tersebut yaitu metode yang digunakan kurang tepat dan kurangnya motivasi siswa dalam mendiskripsikan persoalan. Oleh karena itu peneliti mencoba menggunakan kolaborasi metode ceramah, diskusi dan latihan. Berdasarkan hasil penelitian tindakan kelas yang dilakukan terhadap siswa kelas IVB SDN Pinggir Papas 1 selama dua siklus, kolaborasi metode ceramah, diskusi dan latihan dapat meningktkan prestasi belajar siswa. Untuk prestasi belajar siswa yang tuntas secara indvidu mulai dari siklus I sebanyak 22 siswa (73%) dengan nilai rata-rata 74, pada siklus II bertambah menjadi 27 orang (90%) dengan nilai rata-rata 87. Sedangkan untuk aktivitas belajar siswa pada siklus I mendapat penilaian 60% meningkat menjadi 93,3% pada siklus II, maka dapat dikatakan bahwa pada siklus II ini perbaikan pembelajaran yang dilakukan guru dengan menggunakan kolaborasi metode ceramah, diskusi dan latihan telah berhasil menjadikan siswa aktif dalam mengikuti kegiatan pembelajaran.
Meningkatkan Kemampuan Menyimak Siswa Kelas I Melalui Teknik Permainan Pesan Berantai Pada Pembalajaran Bahasa Indonesia
Authors: Imam Imam 
Published: October 2016

Siswa kelas 1A SDN Pinggir Papas 1 sebagian besar tidak mempunyai latar pendidikan dari TK, mereka memulai segalanya (mengenal huruf dan angka) dari kelas 1.Kemampuan berbahasa Indonesia siswa kelas 1A juga sangat kurang, mereka terbiasa menggunakan bahasa Madura sebagai bahasa komunikasi sehari-hari. Untuk itu peneliti selaku guru kelas 1A, merasa kesulitan di dalam membelajarkan bahasa Indonesia kepada siswa. Hal ini terlihat dari hasil belajar siswa yang rendah di segala aspek keterampilan bahasa, yaitu pada aspek membaca, menulis, menyimak, dan berbicara. Setiap diadakan penilaian terhadap salah satu aspek keterampilan bahasa yang diajarkan, misalnya keterampilan menyimak, nilai hasil belajar siswa selalu di bawah KKM yang telah ditentukan yaitu 65, hanya ada beberapa siswa yang mampu memperoleh nilai di atas KKM yang telah ditentukan.Sebagai alternatif pemecahan masalah maka peneliti sebagai guru kelas 1 berupaya melakukan perbaikan pembelajaran melalui penelitian tindakan kelas yang berjudul “Meningkatkan Kemampuan Menyimak Siswa Kelas 1A Melalui Teknik Permainan Pesan Berantai pada Pembelajaran Bahasa Indonesia”.Berdasarkan hasil penelitian tindakan kelas yang dilakukan selama 2 siklus dengan menggunakan metode observasi dan tes serta data catatan lapangan selama proses pembelajaran, dapat disimpulkan bahwa kemampuan menyimak siswa kelas 1A dapat ditingkatkan melalui penerapan metode permainan pesan berantai pada pembelajaran Bahasa Indonesia yaitu membedakan bunyi bahasa di SDN Pinggir Papas 1 Sumenep. Peningkatan kemampuan menyimak tersebut ditandai dengan meningkatnya hasil belajar siswa setelah mengikuti tes dari guru dengan ketuntasan belajar mencapai 100% dan memperoleh nilai rata-rata sebesar 83,25.
IMPROVEMENT OF SEEDLING ESTABLISHMENT OF WET SEEDED RICE USING GA3 AND IBA AS SEED TREATMENT
Authors: Wahyuni Sri , Sinniah Uma R. , Yusop Mohd. Khanif , Amarthalingam Rajan 
Published: October 2016

Direct seeding has some advantages compared to transplanting system in rice, however there are some constraints need to be addressed. One constraint generally faced in the wet seeded rice is poor stand establishment. The experiment was conducted to improve seedling establishment by using selected growth regulators. Seeds of four rice cultivars, i.e. Memberamo, Widas, MR 84, and MR 219 were treated with GA3 (gibberellic acid-3) of 25, 50, and 100 mg 1-1, and IBA (indole-3 butyric acid) of 10, 20, and 40 mg l-1. Results showed that cultivar response to GA3 was similar in all parameters observed, however the response of cultivars to IBA was different at the initial stage. In Indonesian cultivars (Memberamo and Widas), shoot length of IBA treated seedlings was comparable to the control, but the IBA treated seedlings of Malaysian cultivars (MR 84 and MR 219) had slightly shorter shoots compared to the control. GA3 as seed treatment induced favorable early emergence and shoot growth in the initial stage, but the shoots were etiolated and resulted in susceptible to lodging even in the vegetative stage. In comparison, exogenous application of IBA resulted in high number of adventitious roots contributing towards better establishment of seedling with broader and greener leaves. The growth regulator was lost its effect by 2 or 3 weeks after sowing. All IBA concentrations also did not show any significant differences on growth parameters or have any detrimental effect on grain yield in all cultivar tested. IBA 10 mg l-1 was sufficient in providing the required improvement in the rice seedlings.
THE EFFECT OF RICE CULTIVARS ON METHANE EMISSION FROM IRRIGATED RICE FIELD
Authors: Setyanto P. , Rosenani A.B. , Boer R. , Fauziah C.I. , Khanif M.J. 
Published: October 2016

Rice plants have been reported to affect methane (CH4) emission from rice fields. The objectives of this study were to determine the effect of rice cultivars on CH4 emission from flooded rice and to develop crop management strategies with low emitting rice cultivars while sustaining high yield. The four rice cultivars studied were Memberamo, Cisadane, IR64, and Way Apoburu. The CH4 emissions were determined in the wet season of 2001/2002 (November-February) using an automated closed chamber technique in an irrigated field condition. Farmyard manure at the rate of 5 t ha-1 was given to the plots to ensure carbon was not limited. Root weight, root length, biomass, and number of tillers were determined at 17, 36, and 57 days after transplanting (DAT). The results showed that the mean CH4 emission was highest in the plot planted with Cisadane (94.8 kg CH4 ha-1), and the lowest with IR64 (37.7 kg CH4 ha-1). The plots treated with emberamo and Way Apoburu resulted an intermediate CH4 emission at the average of 61.1 and 58.9 kg CH4 ha-1, respectively. There was no significant difference in yield between the cultivars tested. The yield of Memberamo, Cisadane, IR64, and Way Apoburu were 5.882, 5.764, 5.873 and 6.065 t ha-1, respectively. Statistical analysis showed that there were no significant differences in the root weight and root length among cultivars. However, Cisadane gave the highest dry matter weight (222 g hill-1) at 57 DAT compared to the other cultivars (175-190 g hill-1). Plant tillers did not show significant differences between the cultivars. Regression analysis showed that CH4 flux was significantly related with root weight, root length, aboveground biomass, and number of plant tillers. This finding shows that the use of selected cultivars, such as IR64, can potentially lower CH4 emission without scarifying yield.
ASSESSING GLOBAL CLIMATE VARIABILITY UNDER COLDEST AND WARMEST PERIODS AT DIFFERENT LATITUDINAL REGIONS
Authors: Runtunuwu Eleonora , Kondoh Akihiko 
Published: October 2016

Effect of climate change on water balance will play a key role in the biosphere system. To study the global climate change impact on water balance during 95-year period (1901-1995), long-term grid climatic data including global mean monthly temperature and precipitation at 0.5 x 0.5 degree resolution were analysed. The trend and variation of climate change, the time series of monthly air temperature and precipitation data were aggregated into annual arithmetic means for two extreme periods (1901-1920 and 1990-1995). The potential evapotranspiration (Eo) was calculated using Thornthwaite method.<br />The changes in mean annual value were obtained by subtracting the maximum period data from 1990 to 1995 (Max) with the minimum period data from 1901 to 1920 (Min). The results revealed that over 95-year period, mean global air temperature increased by 0.57oC. The temperature increase varied greatly in Asia, with more than 3.0oC, especially at 45-70oN, as well over the northern part of America (60-65oN) and Europe (55- 75oN). In low latitude across Asia, Africa, and South America, the variation was less than 1.5oC. In 80-85ºN region, the variation was relatively small and at higher latitudes it increased<br />significantly. Precipitation varied temporally and spatially. In the 40-45ºN and 40-45ºS regions, increasing precipitation of more than 100 mm occurred during the June-August and<br />September-November, especially in the northern hemisphere. The Eo increase of 2000 mm during 95 years occurred in the tropical northern America, middle Africa, and South-East Asia. A grid in Central Java of Indonesia showed that the Eo increase of 2500 mm during 95 years resulted in the decrease of growing period by 100 days. In coping with climate change, adjustment of cropping calendar is imperative.
PEMANFAATAN BAHAN PUSTAKA OLEH SISWA: KASUS PADA PERPUSTAKAAN SEKOLAH MENENGAH KEJURUAN PERTANIAN PEMBANGUNAN NEGERI KUPANG
Authors: Widaryono Widaryono 
Published: October 2016

<p>Pengkajian bertujuan untuk mengetahui pemanfaatan bahan pustaka oleh para siswa di perpustakaan Sekolah Menengah Kejuruan Pertanian Pembangunan (SMK-PP) Negeri Kupang<br />sebagai sumber informasi sesuai dengan tujuan pembelajaran. Pengkajian menggunakan metode survei. Responden dalam pengkajian ini adalah 43 siswa yang ditetapkan dengan<br />menggunakan incidental sampling. Pengumpulan data dilakukan dengan menggunakan kuesioner. Data yang telah diperoleh kemudian diolah secara deskriptif dan dilakukan penarikan kesimpulan yang berdasarkan nilai persentase. Variabel yang dikaji mencakup pemanfaatan bahan pustaka, kebutuhan bahan pustaka, kondisi dan kualitas bahan pustaka, dan ketersediaan sarana penelusuran informasi. Hasil pengkajian menunjukkan bahwa pemanfaatan bahan pustaka oleh siswa SMK-PP Negeri Kupang cukup tinggi. Bahan pustaka dimanfaatkan terutama untuk menambah wawasan dan pengetahuan serta untuk menyelesaikan tugas akhir. Buku teks, koleksi referens dan laporan praktek kerja merupakan bahan pustaka yang dibutuhkan siswa. Bahan pustaka yang dimiliki perpustakaan SMK-PP Negeri Kupang berkualitas, beragam, sesuai dengan kebutuhan, tersedia pada saat dibutuhkan, namun jumlah eksemplarnya kurang dan kurang mutakhir.<br />Informasi mudah ditemukan dan sesuai dengan kebutuhan, serta akses informasi cepat dengan menggunakan sarana OPAC, walaupun pemanfaatannya belum optimal.<br /><br /></p>
Association between Blissus insularis Densities and St. Augustinegrass Lawn Parameters in Florida
Authors: Kaur Navneet , Gillett‐Kaufman Jennifer L. , Gezan Salvador A. , Buss Eileen A. 
Published: October 2016

Core Ideas
Cultural control of southern chinch bug in St. Augustinegrass by following recommended guidelines for mowing heights based on turfgrass cultivar, and practicing thatch management may reduce insecticide use and nontarget impacts.
Turf parameters (turf height and thatch thickness) were closely associated to southern chinch bug densities observed in St. Augustinegrass residential lawns.
Best management practices recommended for growing St. Augustinegrass in Florida may help to maintain a balance between turf health and pest pressure.
Turf characteristics in conjunction with environmental factors influence the microclimate suitability for insect pest survival in grasses. In this study, we sought to find the association between southern chinch bug (Blissus insularis) densities, St. Augustinegrass [Stenotaphrum secundatum (Walt.) Kuntze] health characteristics (weed abundance, turf density and height, turf color, chlorophyll content, total Kjeldahl nitrogen concentration, and thatch thickness), and abiotic factors (soil pH, soil and air temperature, soil moisture, and light intensity) by sampling residential lawns in Alachua and Marion counties, Florida. A 2‐year study was conducted: approximately 90 St. Augustinegrass lawns were selected for monthly sampling in May and June 2011. This was followed by weekly sampling in 17 selected lawns in July and August 2011 and 13 lawns in June to August 2012, respectively. Results from lawn surveys indicated that light intensity (r = 0.30, P = 0.0034), and thatch thickness (r = 0.22, P = 0.0390) were positively associated with B. insularis densities. The inverse relationship between turf color and B. insularis densities indicated the impact of insect feeding damage. A significant positive association of insect abundance with grass height and thatch thickness identified the need for turf management practices (mowing at recommended cut height and verticutting/thatch removal) to reduce habitat suitability for insect pest survival.