bluuebunny/crossref_metadata_2025 huggingface dataset:
Spatial cognitive implications of teleporting through virtual environments
Authors: Cherep Lucia , Lim Alex , Kelly Jonathan , Ostrander Alec , Gilbert Stephen B.
Published: May 2019

Teleporting is a popular interface to allow virtual reality users to explore environments that are larger than the available walking space. When teleporting, the user positions a marker in the virtual environment and is instantly transported without any self-motion cues. Five experiments were designed to evaluate the spatial cognitive consequences of teleporting, and to identify environmental cues that could mitigate those costs. Participants performed a triangle completion task by traversing two outbound path legs before pointing to the unmarked path origin. Locomotion was accomplished via walking or two common implementations of the teleporting interface distinguished by the concordance between movement of the body and movement through the virtual environment. In the partially concordant teleporting interface, participants teleported to translate (change position) but turned the body to rotate. In the discordant teleporting interface, participants teleported to translate and rotate. Across all 5 experiments, discordant teleporting produced larger errors than partially concordant teleporting which produced larger errors than walking, reflecting the importance of translational and rotational self-motion cues. Furthermore, geometric boundaries (room walls or a fence) were necessary to mitigate the spatial cognitive costs associated with teleporting, and landmarks were helpful only in the context of a geometric boundary.
Global Information for Multidimensional Tests
Authors: Jonas Katherine
Published: May 2019

New measures of test information quantify information that could be gained by administering the test to an examinee of unknown ability—termed global test information. Currently, these measures have been developed only for unidimensional tests. This study develops measures of multidimensional global information, validates them in data are simulated from models of varying dimensionality, and applies them in neuropsychological data from Rush University's Memory and Aging Project to identify the most informative tests of Alzheimer’s disease. These measures allow for direct comparison of complex tests normed in different samples, facilitating test development and selection.
Effect of growth hormone and growth media on the rooting and shooting of Zanthoxylum armatum stem cuttings
Authors: Phuyal N. , Jha P. K. , Raturi P. P. , Gurung S. , Rajbhandary S.
Published: May 2019

The common method of propagation is through seeds but seed germination in Zanthoxylum armatum is very low due to the presence of hard seed coat, which might be a great hurdle for large scale production of plantlets. So an attempt was made in this study to see the effect of different growth hormones, their concentrations and different rooting media on the rooting and sprouting of Z. armatum. The stem cuttings of Z. armatum were treated with two types of auxins namely Indole-3-Butyric Acid (IBA) and Naphthalene Acetic Acid (NAA) at different concentrations (2000 ppm, 3000 ppm and 5000 ppm), while the untreated cuttings were used as control. The cuttings were planted in three different rooting media: sand, neopeat and mix (containing a mixture of sand, soil and vermin-compost). The completely randomized design was used for the experiment. The total number of stem cuttings of Z. armatum used in the experiment was 1080 for 18 treatments in three replicates (20 cuttings per treatment x 18 treatments x 3 replicates). The experiment was set up in controlled greenhouse conditions at Dabur Nepal Private Limited Nursery, Banepa, Kavre District. The parameters evaluated were root length, shoot length and number of roots per cutting. The collected data were analyzed statistically using R-program with Agricola. Least significant difference (LSD) and Duncan multiple Range Test (DMRT), as mean separation technique was applied to identify the most efficient treatment in the rooting and shooting behavior of Z. armatum (Gomez and Gomez, 1984). Hormone concentration and growth media significantly affected the rooting and shooting ability of Z. armatum stem cuttings. IBA was found to be more effective than NAA. Neopeat medium was better than sand and mix media. The highest number of roots (6.5) and root length (11.6 cm) were recorded under IBA 5000 ppm in neopeat medium.
Higher estimation, lower harvesting: case of NTFPs from Dhaulagiri region, Nepal
Authors: Paudel G. , Acharya R.
Published: May 2019

In Nepal, non-timber forest products (NTFPs) have high potentiality in contributing to local and national economy. Studies have shown that the potentiality of NTFPs has not been realized yet. This paper aims to explore the number of NTFPs species and quantity collected against the number of NTFPs species and quantity specified in the five year forest management plans of three districts (Baglung, Parbat and Myagdi) in Dhaulagiri region. The data related to number of NTFPs species and the quantity collected in fiscal year 2016/2017 were acquired from three District Forest Offices (Baglung, Parbat and Myagdi) and compared them as specified in the five year forest management plans. The NTFPs species specified for collection in the plans were 90 in Baglung, 50 in Myagdi and 13 in Parbat district. Only 21 species from Baglung, 16 species from Myagdi and none species from Parbat were collected in fiscal year 2016/2017. The annual total quantity of the NTFPs specified in the plans of three districts was 454.21 tons with the royalty of US$ 78,500. But the harvested quantity of NTFPs was only 31.18 tons with the royalty of US$ 4,610 in fiscal year 2016/2017. The quantity of harvested NTFPs was 9.59% and 3.64% of their supply potential in Baglung and Myagdi districts, respectively, while there was no collection of NTFPs from Parbat district. On an average, only 6.87% of NTFPs specified in the plans were collected, generating only 5.87% of the total royalty specified in the plans. The study revealed that remoteness of the area, lower quantity of NTFPs for commercial harvesting and lack of site specific plan of NTFPs are the major causes for under harvesting. Networking of local people and NTFPs traders and formulating site and species specific NTFPs conservation, management and utilization plan are necessary to collect NTFPs in a sustainable manner from these districts.
Waste Workers and Occupational Health Risks
Authors: Baral Yuba Raj
Published: May 2019

No abstract available.
DEVELOPMENT TRENCHLESS TECHNOLOGY ECONSTRUCTION OF PIPELINE COMMUNICATIONS WITH A CLEANING PISTON
Authors: Doroshenko Ya. V. , Poliarush K. A. , Zapukhliak V. B.
Published: May 2019

The expediency of reconstruction of pipelines of Ukrainian cities with trenchless technologies is substantiated. The technology of trenchless reconstruction by extending a smaller diameter polyethylene pipe into a worn steel pipe is described – the method of "pipe in a pipe". The advantages of this method are presented. The analysis of possibilities of existing traction means for carrying out of such works is carried out. The technology of trenchless reconstruction of pipeline communications by developing a new polyethylene pipeline into a worn steel cleaning pig has been developed. A section of a new polyethylene pipeline is attached to the cleaning pig by a barbell. The pig moves under the pressure of air, which is fed into the cavity space by the compressor. The inter-tubular space in the working trench is sealed with a sealing system, which is clamped by a clamp or flange to a worn steel pipeline.
The mathematical modeling of the process by pipeline drainage with a cleaning pig is executed. Dependences were obtained for the calculation of the resistance forces acting on the moving system, namely, the mechanical friction forces of the pig cuff to the walls of the steel pipe, the friction forces of the polyethylene pipe to the steel, the friction force of the polyethylene pipe in the cuffs of the sealing system. Dependences are obtained which allow us to calculate the required pressure in the cavity space so that the pig has dragged a new polyethylene pipeline all along the length of the reconstructed horizontal or sloping worn steel pipeline. Under the design pressure in the cavernous space, equipment is selected to perform work
Unification of national legislation in the field of countering extremism and terrorism as a factor of international security
Authors: Nikiforova Elena Nikolaevna , Gavrilova Evgeniia Pavlovna , Evdokimova Viktoriia Sergeevna
Published: May 2019

The article emphasizes that the fight against extremism and terrorism, as a complex problem, has become one of the priorities in the fight against crime for states at the global and regional levels. The level of development of legal acts in the field of countering extremism and terrorism, the severity of punishment for crimes of extremist and terrorist orientation in some countries are analyzed. It is concluded that in modern legislation of different countries, there is no single approach to the definition of the concepts of "terrorism" and "extremism", there is no uniform approach to the system and types of punishments. The proposal on the expediency of a uniform definition of the concepts: “terrorism”, “terrorist”, “international terrorist activity”, unification of national legislation in the field of combating extremism and terrorism as a factor of international security is substantiated
High frequency of low-virulent microorganisms detected by sonication of pedicle screws: a potential cause for implant failure
Authors: Prinz Vincent , Bayerl Simon , Renz Nora , Trampuz Andrej , Czabanka Marcus , Woitzik Johannes , Vajkoczy Peter , Finger Tobias
Published: May 2019

OBJECTIVE

Loosening of pedicle screws is a frequent complication after spinal surgery. Implant colonization with low-virulent microorganisms forming biofilms may cause implant loosening. However, the clinical evidence of this mechanism is lacking. Here, the authors evaluated the potential role of microbial colonization using sonication in patients with clinical pedicle screw loosening but without signs of infection.

METHODS

All consecutive patients undergoing hardware removal between January 2015 and December 2017, including patients with screw loosening but without clinical signs of infection, were evaluated. The removed hardware was investigated using sonication.

RESULTS

A total of 82 patients with a mean (± SD) patient age of 65 ± 13 years were eligible for evaluation. Of the 54 patients with screw loosening, 22 patients (40.7%) had a positive sonication result. None of the 28 patients without screw loosening who served as a control cohort showed a positive sonication result (p < 0.01). In total, 24 microorganisms were detected in those 22 patients. The most common isolated microorganisms were coagulase-negative staphylococci (62.5%) and Cutibacterium acnes (formerly known as Propionibacterium acnes) (25%). When comparing only the patients with screw loosening, the duration of the previous spine surgery was significantly longer in patients with a positive microbiological result (288 ± 147 minutes) than in those with a negative result (201 ± 103 minutes) (p = 0.02).

CONCLUSIONS

The low-virulent microorganisms frequently detected on pedicle screws by using sonication may be an important cause of implant loosening and failure. Longer surgical duration increases the likelihood of implant colonization with subsequent screw loosening. Sonication is a highly sensitive approach to detect biofilm-producing bacteria, and it needs to be integrated into the clinical routine for optimized treatment strategies.
Strategy and effect of repeat bypass surgery for anterior/posterior circulation in refractory moyamoya disease
Authors: Uchino Haruto , Kashiwazaki Daina , Akioka Naoki , Koh Masaki , Kuwayama Naoya , Houkin Kiyohiro , Kuroda Satoshi
Published: May 2019

OBJECTIVE

In this study the authors aimed to describe clinical features, surgical techniques, and long-term outcomes of repeat bypass surgery required for a certain subset of patients with moyamoya disease.

METHODS

The authors retrospectively reviewed a total of 22 repeat bypass surgeries for 20 patients (age range 1–69 years) performed during the last 20 years at their institutions. The patients were classified into 2 groups. Group A included 10 patients who underwent repeat bypass surgery for anterior circulation due to insufficient revascularization on the ipsilateral side. Group B included 10 patients who underwent repeat bypass surgery for posterior circulation due to the involvement of the posterior cerebral artery (PCA) after successful initial surgery for anterior circulation.

RESULTS

Preoperative symptoms included headache in 3 patients, transient ischemic attack in 10, cerebral infarction in 3, and intracranial hemorrhage in 4 patients. Intervals between the initial bypass surgery and repeat bypass surgery were 0.3–30 years (median 3 years). In group A, superficial temporal artery to middle cerebral artery (MCA) anastomosis and indirect bypass were performed on 7 hemispheres. Only indirect bypass was performed on 3 hemispheres because of the lack of suitable donor or recipient arteries. In group B, occipital artery (OA) to PCA anastomosis and indirect bypass were conducted on 4 hemispheres, and OA-MCA anastomosis and indirect bypass on 1 hemisphere. Only indirect bypass was conducted on 7 hemispheres because of the lack of suitable recipient arteries. All 22 repeat bypass surgeries were successfully conducted. During follow-up periods (median 4 years), none of the patients suffered repeat stroke except 1 patient who died of recurrent intracerebral hemorrhage 3 years after repeat bypass surgery for anterior circulation.

CONCLUSIONS

Repeat bypass surgery was feasible and effective to reduce further incidence of headache attack, transient ischemic attack, and ischemic/hemorrhagic stroke in moyamoya disease patients. Through precise radiological analysis, surgical procedures should be planned to yield maximal therapeutic effects.
Burden of cerebral hypoperfusion in patients with delayed cerebral ischemia after subarachnoid hemorrhage
Authors: Jafri Hussain , Diringer Michael N. , Allen Michelle , Zazulia Allyson R. , Zipfel Gregory J. , Dhar Rajat
Published: May 2019

OBJECTIVE

Delayed cerebral ischemia (DCI) after subarachnoid hemorrhage (SAH) may result in focal neurological deficits and cerebral infarction, believed to result from critical regional rather than global impairments in cerebral blood flow (CBF). However, the burden of such regional hypoperfusion has not been evaluated by gold-standard voxel-by-voxel CBF measurements. Specifically, the authors sought to determine whether the proportion of brain affected by hypoperfusion was greater in patients with DCI than in SAH controls without DCI and whether the symptomatic hemisphere (in those with lateralizing deficits) exhibited a greater cerebral hypoperfusion burden.

METHODS

Sixty-one patients with aneurysmal SAH underwent 15O PET to measure regional CBF during the period of risk for DCI (median 8 days after SAH, IQR 7–10 days). Regions of visibly abnormal brain on head CT studies, including areas of hemorrhage and infarction, were excluded. Burden of hypoperfusion was defined as the proportion of PET voxels in normal-appearing brain with CBF < 25 ml/100 g/min. Global CBF and hypoperfusion burden were compared between patients with and those without DCI at the time of PET. For patients with focal impairments from DCI, the authors also compared average CBF and hypoperfusion burden in symptomatic versus asymptomatic hemispheres.

RESULTS

Twenty-three patients (38%) had clinical DCI at the time of PET. Those with DCI had higher mean arterial pressure (MAP; 126 ± 14 vs 106 ± 12 mm Hg, p < 0.001) and 18 (78%) were on vasopressor therapy at the time of PET study. While global CBF was not significantly lower in patients with DCI (mean 39.4 ± 11.2 vs 43.0 ± 8.3 ml/100 g/min, p = 0.16), the burden of hypoperfusion was greater (20%, IQR 12%–23%, vs 12%, 9%–16%, p = 0.006). Burden of hypoperfusion performed better than global CBF as a predictor of DCI (area under the curve 0.71 vs 0.65, p = 0.044). Neither global CBF nor hypoperfusion burden differed in patients who responded to therapy compared to those who had not improved by the time of PET. Although hemispheric CBF was not lower in the symptomatic versus contralateral hemisphere in the 13 patients with focal deficits, there was a trend toward greater burden of hypoperfusion in the symptomatic hemisphere (21% vs 18%, p = 0.049).

CONCLUSIONS

The burden of hypoperfusion was greater in patients with DCI, despite hemodynamic therapies, higher MAP, and equivalent global CBF. Similarly, hypoperfusion burden was greater in the symptomatic hemisphere of DCI patients with focal deficits even though the average CBF was similar to that in the contralateral hemisphere. Evaluating the proportion of the brain with critical hypoperfusion after SAH may better capture the extent of DCI than averaging CBF across heterogenous brain regions.
An advanced protocol for intraoperative visualization of sinunasal structures: experiences from pituitary surgery
Authors: Micko Alexander , Hosmann Arthur , Wurzer Aygül , Maschke Svenja , Marik Wolfgang , Knosp Engelbert , Wolfsberger Stefan
Published: May 2019

OBJECTIVE

The transsphenoidal route to pituitary adenomas challenges surgeons because of the highly variable sinunasal anatomy. Orientation may be improved if the appropriate information is provided intraoperatively by image guidance. The authors developed an advanced image guidance protocol dedicated to sinunasal surgery that extracts information from multiple modalities and forms it into a single image that includes fine sinunasal structures and arteries.

The aim of this study was to compare the advantages of this novel image guidance protocol with the authors’ previous series, with emphasis on anatomical structures visualized and complication rate.

METHODS

This retrospective analysis comprised 200 patients who underwent surgery for pituitary adenoma via a transnasal transsphenoidal endoscopic approach. The authors’ standard image guidance protocol consisting of CT for solid bone, T1CEMRI for soft tissues, and MRA for the carotid artery was applied in 100 consecutive cases. The advanced image guidance protocol added a first-hit ray casting of the CT scan for visualization of fine sinunasal structures, and adjustments to the MRA to visualize the sphenopalatine artery (SPA) were applied in a subsequent 100 consecutive cases.

RESULTS

A patent sphenoid ostium—i.e., an ostium not covered by a mucosal layer—was visualized significantly more often by the advanced protocol than the standard protocol (89% vs 40%, p < 0.001) in primary surgeries. The SPA and its branches were only visualized by the advanced protocol (87% and 91% of cases in primary surgeries and reoperations, respectively) and not once by the standard protocol. The number of visualized complete and incomplete sphenoid septations matched significantly more commonly with the surgical view when using the advanced protocol than the standard protocol at primary operation (mean 1.9 vs 1.6, p < 0.001). However, in 25% of all cases a complex and not a simple sinus anatomy was present. In comparison with the intraoperative results, a complex sphenoid sinus anatomy was always detected by the advanced but not by the standard protocol (25% vs 8.5%, p = 0.001).

Furthermore, application of the advanced protocol reduced the cumulative rate of complications (25% vs 18% [standard vs advanced group]). Although an overall significant difference could not be determined (p = 0.228), a subgroup analysis of reoperations (35/200) revealed a significantly lower rate of complications in the advanced group (5% vs 30%, p = 0.028).

CONCLUSIONS

The data show that the advanced image guidance protocol could intraoperatively visualize the fine sinunasal sinus structures and small arteries with a high degree of detail. By improving intraoperative orientation, this may help to reduce the rate of complications in endoscopic transsphenoidal surgery, especially in reoperations.
Pengolahan Limbah Tongkol Jagung Menjadi Asap Cair dengan Metode Pirolisis Lambat
Authors: Syahrir Muallim , Mahyati Mahyati
Published: May 2019

The purpose of this study was to determine the temperature, time and the optimum size of the pyrolysis process to yield liquid smoke, and to know the grade of liquid smoke. Pyrolysis process were done by varying the temperature 350oC, 400oC, 450oC, 500oC, the time variation of 30 minutes, 60 minutes, 90 minutes, 120 minutes, 150 minutes, 180 minutes and a variety of fine size (3/8 inch), medium (1 inch), coarse (1.5 inches), after the analysis of pH, specific gravity, acid tertitrasi and total phenol content analysis. Liquid smoke that optimum results are calculated to determine whether the economic feasibility of this research can be continued at the industrial stage. The research showed the optimum temperature of 400oC at a yield of 45.5%, the optimum time of 120 minutes resulted in a yield of 46% and smoother optimum size at a yield of 47%. Total acid is between 6.8054% - 7.2746%, pH between 1.8 to 1.9 with phenol levels between 3.4456% - 4% in 1569 to produce liquid smoke to grade 4.
ANALISIS TINGKAT KEVAKUMAN PADA JECTOR TERHADAP FUNGSI POMPA DAN PEMANAS
Authors: Suryanto Suryanto , Rahman Abdul , Muchtar Akbar , Gumara Andi Reno Aria
Published: May 2019

Ejector merupakan komponen atau alat yang memanfaatkan uap dalam kinerjanya baik dalam kinerja pompadan pemanasa .Penelitian ini bertujuan untuk mengamati dan menganalisa kinerja dari ejector sebagai pompa dan pemanas.uap bertekanan dari boiler dialirkan menuju ejector rig. Untuk membuat efek vakum, maka katup input dibuka dengan variasi bukaan (25%-100%) demikian juga dengan variasi katup suction dan delivery dengan bukaan (25%-100%). Parameter-parameter yang diukur ialah tekanan inlet, tekanan suction (vakum), temperatur vakum, tekanan delivery, temperatur delivery, temperatur air kedua tangki, dan level air kedua tangki yang selanjutnya dimasukkan dalam tabel data pengamatan. Berdasarkan hasil pengujian dan analisa data bahwa ejector dapat bekerja sebagai pompa saat tekanan vacum dibawah tekanan atmosfer dan apabila ejector bekerja sebagai pemanas maka air dalam tangki suction yang terpompa akan tercampur dan terkondensasi dengan uap panas yang mengakibatkan naiknya temperatur air menuju tangki delivery. Grafik hubungan antara debit,temperatur air, dan tekanan vakum menunjukanbahwa fluktuasi nilai debit tertinggi yakni 0,47 L/s tekanan vakum 0,85 bar serta temperatur air tertinggi yakni 33,24 oC tekanan vacum 0,9 bar. Sedangkan, efisiensi pompa dan pemanas terhadap tekanan vacum diperoleh nilai efisiensi pompa tertinggi sebesar 32,19 % dan efisiensi pemanas yakni 4,13 % tekanan vakum 0,82 bar.
STUDI POTENSI DAN ANALISIS EKONOMI PADA PEMBANGKIT LISTRIK TENAGA HIBRID DI PULAU BAHULUANG KECAMATAN BONTOSIKUYU, KABUPATEN KEPULAUAN SELAYAR
Authors: Pangkung Andareas , Apollo Apollo , Muhazzaf Arham , Rahim Abdul
Published: May 2019

Pulau Bahuluang merupakan salah satu daerah yang terpisah dari daratan Kabupaten Kepulauan Selayar yang dalam pemenuhan akan kebutuhan listrik tidak mendapat pasokan listrik dari PLN (Pelayanan Listrik Nasional) Selayar. Kebutuhan listrik sehari-hari diperoleh dari generator diesel yang dioperasikan hanya 5 jam per hari dikarenakan biaya operasional yang tinggi pada bahan bakar, itupun dengan harga solar bersubsidi. Struktur pulau Bahuluang yang sebagian besar terdiri dari hamparan dan sabana yang cukup luas serta titik koordinat dari pulau tersebut menyebabkan pulai ini dilalaui angin barat dan angin timur yang cukup berpotensi untuk dimanfaatkan dimana rata-rata kecepatan angin pertahun di Pulau Bahuluang yang bisa dimanfatkan sebesar 7,89 m/s (Dinas Pertambangan dan Energi Kab. Kep. Selayar) serta rata-rata potensi intensitas radiasi matahari pertahun di pulau Bahuluang yang bisa dimanfaatkan sebesar 6 kWh/m2/d dari situs internet (Solar and Wind Energy Resource Assesment).Studi ini mengusulkan pembangkit listrik hibrida di pulau tersebut yang terdiri atas PV (Photo Voltaic) dan WT (Wind Turbine) serta Generator Diesel agar dapat memenuhi kebutuhan listrik 24 jam. Software HOMER (Hybrid Optimization Model for Electric Renewable) digunakan untuk simulasi dan analisis dengan tujuan menghasilkan perencanaan pembangkit listrik hibrida yang optimal di Pulau Bahuluang mengacu pada NPC (Net Present Cost), modal awal dan biaya operasional. Hasil simulasi menunjukan Produksi dan konsumsi energi (kWh/tahun) dari PV (Photo Voltaic) sebesar 22,70% dan WT (Wind Turbine) sebesar 13,51% setidaknya dapat menurunkan biaya operasional dibanding sistem hanya menggunakan Generator Diesel.
RANCANG BANGUN ALAT UJI KINERJA PLTMH SKALA LABORATORIUM
Authors: Salam Abdul , Jamal Jamal , Nasrullah Baso , Limin Theopilus , Irsyam Andi Muh , Wahid Abd
Published: May 2019

Perancangan alat uji kinerja PLTMH dengan skala laboratorium bertujuan untuk mendpatkan alat uji kinerja PLTMH skala laboratorium yang akan digunakan mahasiswa untuk praktikum energi alternatif. Metode perancangan dilakukan dengan melalui studi literatur dan verifikasi data, design rancang bangun turbin cross flow, persiapan alat dan bahan, pembuatan alat uji, pengolahan data, perhitungan daya output (mekanik), pembahasan, dan pembuatan kesimpulan. Hasil yang diperoleh menunjukkan bahwa pada tekanan 0,15 kg/m2 diperoleh daya input sebesar 48,83 watt, daya output maksimum sebesar 3,617 watt dan efisiensi mekanik maksimum sebesar 7,408 %. Pada tekanan 0,2 kg/m2 diperoleh daya input sebesar 71,663 watt, daya output maksimum sebesar 4,913 watt dan efisiensi mekanik maksimum sebesar 6,855 %. Pada tekanan 0,25 kg/m2 diperoleh daya input sebesar 98,168 watt, daya output maksimum sebesar 5,644 watt dan efisiensi mekanik maksimum sebesar 5,75 %.
RANCANG BANGUN MESIN PEMBERSIH RUMPUT LAUT KERING DENGAN SISTEM GETAR
Authors: Rasyid Syaharuddin , Razak Arthur Khalik , H Fajar , Syawaluddin Muh
Published: May 2019

Hasil penelitian ini dapat diketahui bahwa semakin tinggi putaran motor listrik yang dihasilkan maka getaran yang timbul dari pemberat yang melekat pada poros penggerak semakin baik untuk proses pembersihan rumput laut kering. Ini terlihat dari kecepatan motor sebesar 1420 rpm dengan perbandingan puli motor dan puli poros penggerak 1:2 maka kecepatan yang dihasilkan motor penggerak sebesar 710 rpm. Dari 3 sampel hasil pengujian menggunakan mesin ini dihitung rata-rata hasil percobaan sampel pertama sampai ketiga dari 2 kg rumput laut kering menghasilkan kotoran rata-rata 150 gr dalam kurun waktu 15 menit. Kotoran yang dikeluarkan berupa garam, pasir laut serta rumput laut yang memiliki ukuran kurang dari 6 mm dan kotoran asing lainnya yang melekat pada proses pengeringan. Dalam penelitian ini juga dapat diketahui biaya manufaktur mesin pembersih rumput laut kering dengan sistem getar dengan nominal Rp. 4.677.614,- dengan menggunakan komponen mesin dari material St.37.
EKSPERIMEN GETARAN PADA ROBOT MANIPULATOR YANG BERGERAK TRANSLASI
Authors: Dermawan Dermawan , Muhammad Abdul Kadir
Published: May 2019

Robot manipulator banyak digunakan dalam aplikasi di industri manufaktur dan diharapkan mampu mencapai kinerja yang baik, mampu meningkatkan akurasi posisi, operasional yang aman, komsumsi energi yang rendah, serta memiliki bobot yang lebih ringan. Penelitian ini dikhususkan pada pembuatan sebuah robot manipulator sebagai prototype dengan memfokuskan pada kondisi gerakan translasi. Dalam penelitian ini juga akan dibuat sebuah alat ukur getaran yang digunakan untuk mungukur frekwensi dan amplitudo percepatan dengan menggunakan accelarometer ADXL 335. Data yang diperoleh akan di tampilkan dalam bentuk grafik FFT frekuensi dan FFT amplitudo percepatan pada software spider. Dengan menggunakan metode Fast Fourier Transform, dapat diketahui frekwensi getaran yang terjadi pada manipulator. Pada penelitian ini menggunakan manipulator dari bahan aluminium dengan panjang 30 cm dan tebal 0,3 cm. Dari hasil pengukuran yang telah dilakukan maka diperoleh frekwensi analisis sebesar 6,71 Hz. Sedangkan frekwensi eksperimen diperoleh sebesar 6,41 Hz. Pada penelitian ini nantinya akan menggunakan sebuah program komputasi yang akan mengontrol pergerakan robot. Metode yang digunakan adalah metode Desain dan Analisis Eksperimental.
UJI EXPERIMENTAL MODEL TURBIN HYBRID SAVONIUS BERTINGKAT DAN DARRIEUS TIPE H ROTOR
Authors: Buana Chandra , Yunus Muh Yusuf , Pratama Muh Rinaldi , Nurfaizi Muh Saqib
Published: May 2019

Angin merupakan salah satu energi yang sedang dikembangkan saat ini. Perkembangan energi angin di Indonesia untuk saat ini masih tergolong rendah. Salah satu penyebabnya adalah karena kecepatan angin rata-rata di wilayah Indonesia tergolong kecepatan angin rendah, yaitu berkisar antara 3 m/s hingga 5 m/s. Turbin yang cocok digunakan dengan kisaran kecepatan angin tersebut adalah turbin hybrid. Pada penelitian sebelumnya, telah didapatkan bahwa turbin 2S4D dan 3S3D memiliki kinerja terbaik. Tetapi pada kedua turbin tersebutmasih terdapat beberapa kekurangan. Oleh karena itu, untuk memperbaiki kekurangan sebelumnya maka dilakukan penelitian mengenai turbin 2S4D dan 3S3D. Metode yang digunakan adalah metode experimen dan pengembangan, dimana penelitian ini mengembangkan turbin angin hybrid yang telah dikembangkan sebelumnya dengan merancang bangun turbin savonius bertingkat dengan perbedaan sudu serang setiap tingkat sebesar 900, sedangkan untuk turbin darrieus menggunakan Airfoil NACA 2412. Pengujian turbin dilakukan skala lab, dimana sumber angin berasal dari wind tunnel. Adapun data yang dihasilkan dalam pengujian yaitu data mekanik dan data elektrik. Setelah melakukan penelitian, dapat disimpulkan bahwa kedua turbin hybrid yang dibuat memiliki kinerja terbaik dibandingkan dengan turbin hybrid yang dibuat sebelumnya, di mana untuk turbin 2S4D memiliki efisiensi rata-rata 37,6% dan turbin 3S3D memiliki efisiensi rata-rata 29,6%. (Keterangan: S = Savonius & D = Darrieus)Kata Kunci : Turbin angin hybrid, Savonius, Darrieus, Airfoil NACA 2412.
ANALISIS TEGANGAN TARIK DAN LENTUR SAMBUNGAN ALUMINIUM AA 6061 HASIL PENGELASAN FRICTION STIR WELDING (FSW) MENGGUNAKAN PIN SHOULDER TOOL PERSEGI EMPAT
Authors: Suyuti Muhammad Arsyad , Sonda Luther , Misdar Misdar , Pasau Raichard
Published: May 2019

Penelitian ini bertujuan untuk menganalisa tegangan tarik maksimum dan tegangan lentur yang dihasilkan dari hasil pengelasan friction stir welding. Dalam pengelasan ini meterial yang disambung adalah Aluminium AA 6061. Sedangkan parameter pengelasan friction stir welding yang divariasikan yaitu putaran tool, dan kecepatan pengelasan (feeding). Tool yang digunakan memiliki pin shoulder berbentuk persegi empat dengan ukuran sisi yang sama. Dari hasil uji tarik diperoleh tegangan tarik tertinggi pada putaran 1300 rpm dengan feeding 90 mm/min sebesar 160,93 MPa sedangkan tegangan lentur tertinggi diperoleh pada root bending di putaran 1300 rpm dengan feeding 135 mm/min sebesar 487,22 MPa. Secara umum kualitas sambungan hasil pengelasan yang terbaik jika ditinjau dari segi tegangan tarik maksimum dan tegangan lentur diperoleh pada putaran rendah yaitu 1300 rpm. Namun demikian baik tegangan tarik maksimum maupun tegangan lentur pada daerah sambungan nugget zone dan Thermomechaniically Affected Zone (TMAZ) masih jauh lebih rendah dari pada tegangan tarik maksimum dan tegangan lentur logam induk.
Pengembangan Kemampuan Komunikasi Matematik melalui Pembelajaran Take and Give
Authors: Luritawaty Irena Puji
Published: May 2019

AbstrakLatar belakang penelitian ini yaitu fakta bahwa kemampuan komunikasi matematik terbukti berperan strategis dalam berbagai kegiatan pembelajaran, termasuk matematika. Tetapi, pencapaiannya belum optimal. Penelitian ini diantaranya bertujuan menemukan sulusi untuk pengembangan kemampuan komunikasi dalam matematika melalui pembelajaran berbasis Take and Give di kalangan mahasiswa agar mempunyai kompetensi untuk berkomunikasi matematika dengan baik sebagai persiapan untuk menjadi guru. Metode kuasi eksperimen digunakan dalam penelitian ini. Adapun populasi yang dipilih yaitu mahasiswa prodi pendidikan matematika pada institut pendidikan swasta di Garut, dengan mahasiswa tingkat IIA dan IIB sebagai sampel dengan jumlah 50 mahasiswa. Penelitian menggunakan instrumen berbentuk tes uraian untuk pretest dan posttest. Dari hasil penelitian secara garis besar diketahui bahwa mahasiswa dengan pembelajaran Take and Give mempunyai kemampuan komunikasi matematik yang lebih baik daripada pembandingnya yaitu mahasiswa dengan pembelajaran ceramah biasa. Pembelejaran Take and give terbukti signifikan dalam mengembangkan kemampuan komunikasi matematik. Development of Mathematical Communication Ability through Take and Give LearningAbstractBackground of this study is the fact that mathematical communication ability is proven to be a strategic role in various learning activities, including mathematics. But, the achievement is not optimal. This research included the aim of finding solutions to the development of communication skills in mathematics through Take and Give learning among college students in order to have the competence to communicate mathematics well in preparation for becoming a teacher. This research used The quasi-experimental method. The population chosen is college students of the mathematics department at private education institutes in Garut, with students of level IIA and IIB as a sample with 52 students. The study used a descriptive test instrument for pretest and posttest. Based on the results of this research in broad outline, it is known that students with Take and Give learning have mathematical communication skills that are better than the comparison, namely students with regular lecture learning. Take and give learning proved to be significant in developing mathematical communication skills.
Pengaruh Model Pembelajaran Kontekstual terhadap Pemahaman Konsep Matematika Siswa SMP
Authors: Brinus Kristianti Sry Wahyuningsih , Makur Alberta Parinters , Nendi Fransiskus
Published: May 2019

AbstrakRendahnya kemampuan pemahaman konsep matematis siswa di kelas VIII SMP Negeri 4 Langke Rembong tahun ajaran 2018/2019 menjadi latar belakang masalah penelitian ini. Tujuan dilakukannya penelitian ini adalah untuk mengetahui pengaruh model pembelajaran kontekstual terhadap pemahaman konsep matematis siswa di sekolah ini. Jenis penelitian ini adalah penelitian eksperimen semu, dengan menggunakan desain Posttest Only Control Group Design.  Populasi yang dipilih  dalam penelitian ini adalah seluruh siswa kelas VIII SMP Negeri 4 Langke Rembong  sebanyak 211 orang. Teknik pengambilan sampel menggunakan random sampling dan anggota sampel dalam penelitian ini adalah 60 orang. Data dikumpulkan dengan menggunakan instrumen tes pemahaman konsep matematika yang berbentuk tes uraian. Hasil penelitian menunjukan bahwa pemahaman konsep matematika siswa yang dibelajarkan dengan model pembelajaran kontekstual lebih baik dari pada pemahaman konsep matematika siswa yang dibelajarkan dengan model pembelajaran konvensional. Model pembelajaran kontekstual dinilai dapat menghubungkan materi yang dipelajari dengan situasi kehidupan nyata. Contextual Learning Model’s Effect on Mathematical Concept Understanding of Middle School StudentsAbstractThe low ability to understand the mathematical concepts of students in grade VIII Langke Rembong 4 Public Middle School 2018/2019 school year fits the background of the problem of this research. The goal of this study was to discover the effect of contextual learning models on understanding the mathematical concepts of students in this school. This type of research is quasi-experimental research, using the design of the Posttest-Only Control Group Design. The population chosen in this study were all eighth -grade students of Langke Rembong 4 SMP Negeri as many as 211 people. The sampling technique used random sampling and the sample members in this study were 60 people. Data was collected by using mathematical concept understanding test instruments in the form of description tests. The results of the study show that understanding the mathematical concepts of students who are taught by the contextual learning model is better than understanding the mathematical concepts of students who are taught with conventional learning models. The contextual learning model is assessed to be able to relate the material learned with real-life situations.
Pengaruh Model Pembelajaran Giving Question Getting Answer dan Think Pair Share terhadap Kemampuan Penalaran Matematika Siswa Kelas VII
Authors: Octaviyunas Asurya , Ekayanti Arta
Published: May 2019

AbstrakPenelitian ini didasari atas permasalahan pentingnya kemampuan penalaran matematis dan pencapaiannya yang masih rendah. Tujuan dari penelitian ini adalah mengetahui pengaruh model pembelajaran Giving Question Getting Answer dan Think Pair Share terhadap kemampuan penalaran matematika siswa, dan efektifitasnya dalam meningkatkan kemampuan tersebut. Populasi Penelitian eksperimen semu ini mencakup seluruh siswa kelas VII SMPN 1 Balong. Kelas VIIA diberi pembelajaran dengan model TPS sedangkan kelas VIIB dengan model GQGA. Instrumen pengumpulan data berbentuk tes, meliputi soal pretest dan posttest. Hasil penelitian menunjukkan bahwa model pembelajaran GQGA berpengaruh terhadap kemampuan penalaran siswa kelas VIIB dengan peningkatan yang terjadi dari nilai pretest ke posttest. Begitu juga dengan model pembelajaran TPS berpengaruh terhadap kemampuan penalaran matematika siswa kelas VIIA dengan peningkatan nilai pretest ke posttest. Model pembelajaran GQGA tidak lebih efektif daripada model pembelajaran TPS dalam meningkatkan kemampuan penalaran matematika siswa. The Effect of Learning Model Giving Question Getting Answer and Think Pair Share Toward Reasoning Mathematics Ability Student’s Grade VII AbstractThis research is based on the problem of the importance of mathematical reasoning abilities and their low achievement. The purpose of this study was to determine the effect of Giving Question Getting Answer and Think Pair Share learning models on students' mathematical reasoning abilities and their effectiveness in enhancing these abilities. Population This quasi-experimental study included all seventh-grade students of Balong 1 Junior High School. The VIIA class is given learning with the TPS model while the VIIB class is with the GQGA model. The instruments of data collection are in the form of tests, including the questions of the pretest and posttest. The results showed that the GQGA learning model had an effect on the reasoning ability of students in class VIIB with an increase that occurred from the pretest to the posttest. Likewise, the TPS learning model influences the mathematical reasoning abilities of VIIA students with an increase in the value of the pretest to posttest. The GQGA learning model is no more effective than the TPS learning model in improving students' mathematical reasoning abilities.
Peningkatan Kemampuan Literasi Statistis melalui Model Pembelajaran Berbasis Proyek yang Dimodifikasi
Authors: Priyambodo Sudi , Maryati Iyam
Published: May 2019

AbstrakKemampuan literasi statistis siswa sekolah menengah pertama masih rendah. Salah satu cara untuk meningkatkan kemampuan tersebut dengan melakukan inovasi terhadap model pembelajaran yang diterapkan. Berkaitan dengan peningkatan kemampuan literasi statistis tersebut diterapkan model pembelajaran berbasis proyek yang dimodifikasi. Metode dalam penelitian ini metode kuasi-eksperimen dengan instrumen penelitian soal tes berupa indikator kemampuan literasi statistis. Subjek penelitian siswa kelas VIII pada Madrasah Tsanawiyah berjumlah 36 orang siswa. Hasil dari penelitian ini adalah terdapat perbedaan kemampuan literasi statistis yang signifikan antara siswa yang mendapat model pembelajaran berbasis proyek yang dimodifikasi dengan model pembelajaran ekspositori. Model pembelajaran berbasis proyek yang dimodifikasi dapat digunakan sebagai alternatif model pembelajaran dalam meningkatkan kemampuan literasi statistis. Enhancing Statistical Literacy Abilities through Modified Project-Based LearningAbstractThe statistical literacy ability of junior high school students is still low. One way to improve this ability is by innovating the applied learning model. Regarding the increase in statistical literacy skills, a modified project-based learning model is applied. The method in this study is a quasi-experimental method with a research instrument about test questions in the form of indicators of statistical literacy. The research subjects of class VIII students at the Tsanawiyah Madrasah were 36 students. The results of the study are that there are significant differences in statistical literacy skills between students who receive a project-based learning model modified by the expository learning model. The modified project-based learning model can be used as an alternative learning model for improving statistical literacy skills.
Lower connectivity of tumor coexpression networks is not specific to cancer
Authors: Dalgıç Ertuğrul , Konu Özlen , Öz Zehra Safi , Chan Christina
Published: May 2019

Global level network analysis of molecular links is necessary for systems level view of complex diseases like cancer. Using genome-wide expression datasets, we constructed and compared gene co-expression based specific networks of pre-cancerous tumors (adenoma) and cancerous tumors (carcinoma) with paired normal networks to assess for any possible changes in network connectivity. Previously, loss of connectivity was reported as a characteristic of cancer samples. Here, we observed that pre-cancerous conditions also had significantly less connections than paired normal samples. We observed a loss of connectivity trend for colorectal adenoma, aldosterone producing adenoma and uterine leiomyoma. We also showed that the loss of connectivity trend is not specific to positive or negative correlation based networks. Differential hub genes, which were the most highly differentially less connected genes in tumor, were mostly different between different datasets. No common gene list could be defined which underlies the lower connectivity of tumor specific networks. Connectivity of colorectal cancer methylation targets was different from other genes. Extracellular space related terms were enriched in negative correlation based differential hubs and common methylation targets of colorectal carcinoma. Our results indicate a systems level change of lower connectivity as cells transform to not only cancer but also pre-cancerous conditions. This systems level behavior could not be attributed to a group of genes.
Analisis Pengaruh Kualitas Jasa Pelayanan Terhadap Kepuasan Mahasiswa
Authors: Sri Ratnasari Agatha Septianna , Wijaya Antonny , Yeniyati Prisca
Published: May 2019

The aim of this reseach is to analyze the impact of Service Quality towards Students Satisfaction within Musi Charitas Chatolic University (MCCU). Service quality has five determinants, which are reliability, responsiveness, assurance, emphaty and tangibles. These determinants should be fit with MCCU basic values CHAMPION. Research Sample 214 students from three faculties of MCCU using convenience sampling technique. Data Analyze Technique using Simple Regression and frequent tabulation. The results indicated that Students have not been satisfied yet with the service quality required and still need continuously improvement to improve sustainability competitiveness.
Efektifitas Komunikasi Pemasaran Pada Usaha Mikro, Kecil dan Menengah Bidang Kuliner Di Surabaya
Authors: Rahmawati Veronica , Sulistyo Andy Pratama
Published: May 2019

Dari tahun ke tahun jumlah usaha mikro kecil dan menengah di Indonesia semakin meningkat, peningkatan ini dibarengi dengan semakin meningkatkan kesadaran berwirausaha di Indonesai. Mulai dari orang-orang muda hinga pensiunan mulai menekuni pekerjaan menjadi pengusaha UMKM. Peningkatan jumlah usaha kecil mikro dan menengah di Indonesia ini, membawa dampak positif bagi kondisi perekonomian di Indonesia, diantaranya membuka peluang kerja bagi masyarakat di sekitar lokasi UMKM, dengan begitu melalui UMKM masyarkata mampu menggerakan roda perekonomian keluarga hingga berdampak bagi penompang perekonomian Indonesia. Meningkatnya jumlah UMKM tentu saja membawa dampak persaingan bisnis semakin ketat, masing sarana komunikasi pemasaran yang tepat menjadi tantangan tersendiri sehingga komunikasi pemasaran yang dilakukan UMKM effektif. Penelitian ini menggunakan pendekatan kuantitaif yang dilakukan untuk mengetahui penaruh dari Marketing Communication Objective dan Communication Channel terhadap Marketing Communication Effectiveness. Populasi dalam penelitian ini adalah pelaku usaha mikro kecil dan menengah di Surabaya, dengan mengambil sampel pelaku UMKM dibidang kuliner di Surabaya sebanyak 136 responden UMKM di Surabaya yang diambil melalui teknik purposive sampling yang diolah menggunakan teknik regresi berganda dengan aplikasi SPSS. Temuan dari penelitian ini adalah terdapat pengaruh positif antara Marketing Communication Objective terhadap Marketing Communication Effectiveness begitu juga terdapat pengaruh positif antara Communication Channel terhadap Marketing Communication Effectiveness.
Analisis Kelayakan Usaha dan Nilai Tambah Kerupuk Cumi
Authors: Arul Ramli , Setiawan Budi , Mustaniroh Siti Asmaul
Published: May 2019

One attempt to create a processed product of fishery products in the form of finished goods which main raw material are fishery products is by processing it into crackers. Crackers are generally made from tapioca flour as a source of starch with the addition of spices and water which have a low nutrient content. Addition of nutritional crackers can be done by adding fish meat. While on the other hand, the type of fish as the main raw material for making fish crackers greatly influences the color, texture and taste of fish crackers. As in the case with squid crackers which have distinctive taste and performance when compared to other fish crackers. To see the potential of the squid cracker business, it is necessary to conduct research to see whether the processing of squid into squid crackers is able to provide increased income or in other words whether the squid cracker business is feasible or not and how much added value from processing squid to squid crackers. This study aims to look at the feasibility of squid cracker business in terms of financial aspects and to determine the amount of added value obtained from processing squid into squid crackers. The research showed that the development of a squid cracker business was feasible and prospective to be carried out.
Medico-Legal Aspects of Containment of the Spread of Sexually Transmitted Infections
Authors: Alexandrovich Sizov Alexander , Vladimirovna Pashina Irina , Gennadievna Lischuk Natalya , Evgenievna Alferova Marina , Vladimirovich Lyaskovets Andrew , Fizulievich Shahbazov Ramiz , Alexandrovna Andreeva Nina
Published: May 2019

Sexually transmitted infections are a group of diseases that include syphilis, gonorrhea, chlamydial and mycoplasma infections, trichomoniasis, herpes and HPV infections of the genital organs. In addition, sexually transmitted human immunodeficiency virus, causing a disease called acquired immune deficiency syndrome. According to the World Health Organization, every year more than 340 million people aged 15-49 suffer from sexually transmitted infections worldwide. The basis for the prevention of the spread of sexually transmitted infections and infection with the human immunodeficiency virus should be considered the presence of internal moral attitudes. The motive for the start of sexual life should be your own conscious decision, and not pressure from a partner, fear of losing him, desire to please him and preserve the relationship. Despite the rather wide spread of sexually transmitted infections and the occurrence of infection with human immunodeficiency virus, the implementation of the simplest recommendations guarantees the safety of intimate life and preservation of health. A clear legal regulation of actions of a sexual nature, associated with the risk of infection or entailing infection with sexually transmitted infections, helps to curb their distribution. It is essential for maintaining the sexual health of people of young and mature age, which is an important resource of any country.