197,161 research outputs found
Mass and stiffness modifications to achieve desired natural frequencies
No full textDmitri D. Sivan and Yitshak M. Ra
A comprehensive life cycle assessment of vacuum insulation panels (VIPs) for applications at up to 70 °C
No full textData availability:
Data will be made available on request.This paper presents a comprehensive Life Cycle Assessment (LCA) of Vacuum Insulation Panels (VIPs) with four core materials: fumed silica (FS) and three FS-based composites incorporating tree-based natural fibre (TNF) waste and tree-based natural ash (TNA), using a typical car painting booth (CPB) as a case study. A cradle-to-cradle evaluation is performed using two functional units: material transport capacity (6.2 tonnes per truck) and VIP dimensions (1 m × 1 m × 25 mm). VIPs were manufactured and their thermal conductivity measured over pressures of 0.64–1000 mbar and temperatures of 20–70 °C. Ageing effects were assessed by storing VIPs at 70 °C and 75% relative humidity for 12 months. Measured thermal conductivities were used to predict CPB energy consumption over a 10-year operational lifetime. Results show that FS–TNA VIPs (S4) reduced total cradle-to-cradle energy demand by 82,761 MJ compared with FS VIPs (S1) using Cut-off approach. However, this energy benefit did not translate into a climate advantage, as S4 exhibited a higher climate change impact of 893 kg CO2 eq, primarily due to pyrolysis-related emissions. Under the Allocation at Point of Substitution (APOS) approach, S4 reduced total energy demand by 17,216 MJ and climate change impact by 141 kg CO2 eq relative to FS, reflecting both operational energy savings and avoided biomass degradation emissions. When expressed per unit of energy saved relative to S1, S4 resulted in 55.0 kg CO2 eq per GJ under the modified Cut-off scenario used as the main modelling approach in this study, and (−) 8.2 kg CO2 eq per GJ under the modified APOS scenario used as an alternative allocation approach, highlighting the scenario-dependent energy–climate trade-off. Overall, the study demonstrates that trade-offs between embodied emissions, operational energy demand, and end-of-life modelling influence VIP environmental performance and provides a transparent methodology to support material selection for high-temperature industrial applications.Acknowledgment:
Singh and Sivan thankfully acknowledge India's SPARC 2019-2020 funding received for the project number 2066
Antibes – La Courtine, Pré aux Pêcheurs
No full textIdentifiant de l'opération archéologique : 8394 Date de l'opération : 2007 (EX) Inventeur(s) : Daveau Isabelle (INRAP) ; Sivan Olivier (INRAP) La mairie d’Antibes projette la construction d’un parking souterrain en bordure du port Vauban, au pied de la Courtine. L’ampleur du projet, couvrant une superficie de près de 16 000 m2 sur 12 m de profondeur, et sa localisation à l’emplacement du port antique ont motivé une intervention de diagnostic archéologique. Afin d’appréhender la totalité de la..
Figure 16 in Conchometrics, systematics and distribution of Melanopsis (Mollusca: Gastropoda) in the Levant
No full textFigure 16. Distribution of Melanopsis saulcyi (•), M. pachya (-), M. germaini (), M. infracincta (Δ) and M. sp. (') in the Levant (inspected records).?, type locality of M. saulcyi as suggested by Pallary.Published as part of Heller, Joseph, Mordan, Peter, Ben-Ami, Frida & Sivan, Naomi, 2005, Conchometrics, systematics and distribution of Melanopsis (Mollusca: Gastropoda) in the Levant, pp. 229-260 in Zoological Journal of the Linnean Society 144 (2) on page 251, DOI: 10.1111/j.1096-3642.2005.00172.x, http://zenodo.org/record/543444
Comparación de efectividad de distintos insecticidas en el control de “Trips” Thrips tabaci L., en el cultivo de cebolla (Allium cepa L.) cultivar sivan, en el Proter - Sama
No full textEl presente trabajo de tesis titulado “COMPARACIÓN DE EFECTIVIDAD DE DISTINTOS INSECTICIDAS EN EL CONTROL DE TRIPS (Trips tabaci L.), EN EL CULTIVO DE CEBOLLA Allium cepa L. CULTIVAR SIVAN, (PROTER) – SAMA”; se realizó con el objetivo de evaluar la efectividad de distintos insecticidas en el control de trips (Trips tabaci), en el cultivo de cebolla cultivar SIVAN en el PROTER – SAMA. Se utilizó el cultivar Sivan y 4 insecticidas T1: EPINGLE 10 EC; T2: PROVADO COMBI; T3: REGENT; T4: FURIA y un testigo T0: Sin aplicación. El área experimental fue de 50,00 m x 15 m teniendo un área total de 750 m2; la siembra se realizó a un distanciamiento de 0,10 m entre plantas y 1,00 m entre líneas. Se empleó el diseño de bloques completos aleatorios con 5 tratamientos y 4 repeticiones, para el análisis estadístico se utilizó el análisis de varianza y para la diferencias de promedios se utilizó la prueba de significación de Duncan y Tukey. La mayor efectividad para el número del thrips tabaci vivos/planta en cultivar Sivan, en las siete aplicaciones, se obtuvieron con los tratamientos T2: PROVADO COMBI y T3: REGENT, sin embargo T1: EPINGLE 10 EC y T4: FURIA no tuvieron una efectividad significativa. Los rendimientos (t/ha) más altos se obtuvieron con los tratamientos T3: REGENT y el T2: PROVADO COMBI con 55,22 t/ha y 54,84 t/ha, respectivamente en el tercer lugar se ubicó el T4: FURIA con 53,06 t/ha.Tesi
Cavalaire-sur-Mer – Avenue du Port
No full textIdentifiant de l'opération archéologique : 7925 Date de l'opération : 2007 (EX) Inventeur(s) : Conche frédéric (INRAP) ; Lang-Desvignes Suzanne (INRAP) ; Sivan Olivier (INRAP) Ce diagnostic mené par l’INRAP (titulaire de l’autorisation : Frédéric Conche avec la collaboration de M. Taras-Thomas.) aura permis d’estimer plus précisément les limites septentrionales de l’antique agglomération de Heraclea Caccabaria, en abordant l’espace rural où furent distinguées des traces de plantation d’un vig..
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
Evidence for centennial scale sea level variability during the Medieval Climate Optimum (Crusader Period) in Israel, eastern Mediterranean
No full textThe current study provides evidence supporting a sea-level drop of up to about 50 ± 20 cm at the eastern coasts of the Mediterranean basin during the period AD 900–1300. The estimate is based on a variety of archaeological remains, mostly from the Crusader period, compared with other archaeological and biological proxies of sea level from the periods before and after.The Crusader low levels overlap the period known as the ‘Medieval Warm Period’ (MWP) or the ‘Medieval Climate Anomaly’ (MCA). On the basis of published data it appears that a positive North Atlantic Oscillation (NAO) phase coincided with a negative Southern Oscillation Index (SOI), the former affecting the temperature and freshwater flux in the Mediterranean Sea and most of its rivers, and the latter affecting the Nile outflow. Changes of 0.125 psu in salinity and 0.4 °C are estimated as upper limits for the change, and these are expected to cause a sea-level drop consistent in magnitude with the observed values. These provide the upper limit for a regional climate-forcing attribution of the observed sea level low. The possibility of crustal uplifts contributing to the observed changes is also discussed
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
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