64 research outputs found
AKTIVASI ZEOLIT SEBAGAI ADSORBEN GAS CO2
Full text linkAktivasi zeolit sebagai adsorben gas CO2 dari biogas dilakukan secara kimia dan fisika dengan tujuan menghilangkan pengotor organik untuk mendapatkan bentuk kation dan kerangka zeolit yang berbeda,Aktivasi zeolit ditujukan untuk modifikasi zeolit dan memperbaiki karakter zeolit.Secara kimia sebagai activator digunakan H2SO4 dengan konsentrasi bervariasi pada rentang 5% s/d 30% dan secara fisika dilakukan kalsinasi pada suhu 500 OC selama 4 jam. Proses adsorpsi dilakukan dengan mengalirkan gas CO2 sintetis 98,86% dari bagian bawah kolom adsorber berdiameter 5 cm dan tinggi 30 cm dengan rate 0,0022 lt/menit s/d 0,0058 lt/menit, tinggi adsorben dalam kolom 28 cm dan ukuran butir zeolit -20/+28 mesh .Penelitian menghasilkan kondisi terbaik pada aktivasi kimia H2SO4 25% dan kalsinasi meningkatkan perbandingan Si/Al 76,95% dan peningkatan daya serap gas CO2 75,5 % pada rate gas masuk adsorber 0,0022lt/menit
PROTEKSI KATODIK DENGAN ANODA TUMBAL SEBAGAI PENGENDALIAN KOROSI BAJA DALAM LINGKUNGAN AQUEOUS
Full text linkCathodic Protection is one of the method to Control Corrosion rate thermodynamically by applying steel as cathode. Application of this methode is by flow the DC current through electrolite to steel so that potential interface between steel and electrolite goes to immun area or until paricular value which corrosion speed allowed (minimum).Cathodic Protection using sacrificial anode methode was researched in electrochemistry way.Experiment was done to AISI SAE 1018 steel in NaCl environtment 3.5% within 168 to 840 hours using sacrificial anode Al and Zn.From analysis data using mass loss methode, Al anode able to decrease steel corrosion speed untill 82% and Zn for 50. %Keyward :Cathodic protection, sacrificial anod
Model Pengendalian Katodik Dalam Elektrode Disk Pemutar Sistem Korosi
Full text linkThe effect of fluids flow rate onto necessity of current density cathodic protection which characterized using Rotating disk electrode (RDE) model has been researched on an electrochemistry manner. This research was done to AISI 1018 steel as the electrode spinning cylinder-shaped inside aerated dissolvable NaCl 3.5%. using variation spinning rate 0–2000rpm and 25–75° C temperature. Current density cathodic protection necessity determined from the steel interface potential - 800mV with reference anode Ag/AgCl. Experiment result shows that the increasing of electrode rate, cathodic protection current density needs increased due to diffusion layer tare faction and also because corrosion potential become more positive. Higher temperature would increase cathode protection current density needs and makes corrosion potential more negative. Oxygen activation energy value to be diffused onto electrode surface support the corrodibility AISI 1018 toward temperature increment, because cathodic reaction controlled by transfer mass of dissolved oxygen
Model Pengendalian Katodik Dalam Elektrode Disk Pemutar Sistem Korosi
No full textThe effect of fluids flow rate onto necessity of current density cathodic protection which characterized using Rotating disk electrode (RDE) model has been researched on an electrochemistry manner. This research was done to AISI 1018 steel as the electrode spinning cylinder-shaped inside aerated dissolvable NaCl 3.5%. using variation spinning rate 0–2000rpm and 25–75° C temperature. Current density cathodic protection necessity determined from the steel interface potential - 800mV with reference anode Ag/AgCl. Experiment result shows that the increasing of electrode rate, cathodic protection current density needs increased due to diffusion layer tare faction and also because corrosion potential become more positive. Higher temperature would increase cathode protection current density needs and makes corrosion potential more negative. Oxygen activation energy value to be diffused onto electrode surface support the corrodibility AISI 1018 toward temperature increment, because cathodic reaction controlled by transfer mass of dissolved oxygen
Author identity
No full textPráce popisuje dva nové mezinárodní standardy pro identifikaci autorů uvedené v roce 2010: ISNI - International Name Standard Identifier (návrh standardu ISO) a ORCID (návrh standardu pro identifikaci vědeckých autorů vycházející z Research ID od společnosti Thomson Reuters). Oba standardy jsou teprve ve svých počátcích
Author Identifier Analysis: Name Authority Control in Two Institutional Repositories
No full textThe aim of this poster is to analyze name authority control in two institutional repositories to determine the extent to which faculty researchers are represented in researcher identifier databases. A purposive sample of 50 faculty authors from Florida Southern College (FSC) and Ryerson University (RU) were compared against five different authority databases: Library of Congress Name Authority File (LCNAF), Scopus, Open Researcher and Contributor ID (ORCID), Virtual International Authority File (VIAF), and International Standard Name Identifier (ISNI). We first analyzed the results locally, then compared them between the two institutions. The findings show that while LCNAF and Scopus results are comparable between the two institutions, the difference in the ORCID, VIAF, and ISNI are considerable. Additionally, the results show that the majority of authors at each institution are represented in two or three external databases. This has implications for enhancing local authority data by linking to external identifier authority data to augment institutional repository metadata
Easier Author Identification
Full text linkThis lightning talk would discuss our efforts to make it easier to identify authors and retrieve a full list of works in the repository. We rely on existing identifiers and standards resulting in no added costs and no new identifier systems. We are currently adding ISNI, VIAF, Library of Congress, and Institutional identifiers for each faculty member (where available). We have also added an indexed field in our Digital Commons instance to allow searching by those identifiers. The system can easily accommodate new identifiers and allows filtering that is not normally available in the Digital Commons search methods
PEMBUATAN PLASTIK BIODEGRADABLE BERBAHAN PATI DARI LIMBAH KULIT PISANG RAJA DENGAN PENAMBAHAN KITOSAN DAN PLASTICIZER SORBITOL
Full text linkAlternatif dari penggunaan plastik konvensional yaitu menggunakan plastik Biodegradable. Plastik biodegradable terbuat dari bahan polimer alami seperti pati, selulosa, dan lemak. Dalam pembuatannya diperlukan penambahan bahan lain yaitu kitosan sebagai perekat dan plasticizer sebagai pemlastis. Tujuan penelitian ini adalah untuk menentukan komposisi optimum material bioplastik sehingga memiliki sifat mekanik, sifat fisik dan biodegradabilitas yang sesuai standar bioplastik yang berlaku. Penelitian ini menggunakan pati yang diekstraksi dari kulit pisang raja dengan memvariasikan penambahan kitosan (2,3,4,5,6 gram) serta variasi penambahan sorbitol sebagai plasticizer (2,3,4,5,6 ml). Pembuatan plastic biodegradable dilakukan dengan melakukan pencampuran setiap bahan dan dilakukan pemanasan pada temperatur 60oC selama 1 jam dan dilakukan pencetakan pada plat kaca untuk dioven selama 5-6 jam. Hasil yang diperoleh akan diuji nilai kuat tarik, elongasi dengan menggunakan standar ASTM D638 sebagai acuan, serta menguji kemampuan terdegradasi. Diperoleh plastik biodegradable terbaik pada komposisi 4 gram pati dengan penambahan 5 gram kitosan dan 6 ml sorbitol dimana nilai kuat tarik sebesar 49.9380 Mpa dan nilai elongasi 68.28 % serta kemampuan terdegradasi hingga 100 % pada minggu ketiga setelah dilakukan penimbunan dalam tanah
Identificación de autores: Nombres y números
Full text linkThe identification of authors has a crucial role at the moment of information retrieval, also for the correct attribution of authorship of the works, the distribution of royalties for copyright concepts (DRM), and to facilitate interoperability among authors, consumers, publishers and cultural organizations such as rights management societies, libraries and bibliographic agencies.
This presentation provides an overview of the bibliographic identification systems; studies the concept, objectives and characteristics of bibliographic identifiers (unique identifiers). Describes the International Standard Name Identifier (ISNI): its objectives and its administration. Explains their structure and their usefulness in the public identity disambiguation with respect to the individual author, variants in transliteration and linguistic variants. It concludes with examples of the ISNI and Virtual International Authority File (VIAF) databases
How should Catalogers Provide Authority Control for Journal Article Authors? Name Identifiers in the Linked Data World
Full text linkThis article suggests that catalogers can provide authority control to authors of journal articles by linking to external international authority databases. It explores the representation of article authors from three disciplines in four databases: International Standard Name Identifier (ISNI), Open Researcher and Contributor ID (ORCID), Scopus, and Virtual International Authority File (VIAF). VIAF and Scopus are particularly promising databases for journal author names, but we believe that a combination of several name databases holds more promise than relying on a single database. We provide examples of RDF links between bibliographic description and author identifiers, including a partial BIBFRAME 2.0 description
- …
