Academic literature on the topic 'SSPFM'
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Journal articles on the topic "SSPFM"
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Nor Farihah Azman, Abdul Kadir Jumaat, Akmal Shafiq Badarul Azam, Noor Ain Syazwani Mohd Ghani, Mohd Azdi Maasar, Mohamed Faris Laham, and Normahirah Nek Abd Rahman. "Digital Medical Images Segmentation by Active Contour Model based on the Signed Pressure Force Function." Journal of Information and Communication Technology 23, no. 3 (July 28, 2024): 393–419. http://dx.doi.org/10.32890/jict2024.23.3.2.
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The signed pressure force (SPF) function has recently become a popular function for guiding the curve evolution of the active contour model (ACM) for image segmentation. The aim is to extract the boundaries of digital medical images for shape and image analysis. The recent SPF-based ACM demonstrates effectiveness in image segmentation. However, it may fail if the targeted object is close to a neighbouring object. Additionally, the presence of intensity inhomogeneity and noise in medical images degrades segmentation accuracy and local target areas. Thus, we proposed a new SPF-based ACM, namely the Selective Segmentation with Signed Pressure Force 1 (SSPF1) model, by incorporating the ideas of the SPF function and the distance fitting term based on geometrical constraints. Then, the new SSPF1 model was extended by incorporating an image enhancement technique to develop our second new model, termed the Selective Segmentation with Signed Pressure Force 2 (SSPF2). Numerical results indicated that the SSPF2 model was more recommended than SSPF1 as the SSPF2 model was approximately 4.7% more accurate, as indicated by the Jaccard value and was about 112 times faster in segmenting noisy images compared to the existing selective segmentation model.
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Sobash, Ryan A., and John S. Kain. "Seasonal Variations in Severe Weather Forecast Skill in an Experimental Convection-Allowing Model." Weather and Forecasting 32, no. 5 (September 27, 2017): 1885–902. http://dx.doi.org/10.1175/waf-d-17-0043.1.
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Abstract Eight years of daily, experimental, deterministic, convection-allowing model (CAM) forecasts, produced by the National Severe Storms Laboratory, were evaluated to assess their ability at predicting severe weather hazards over a diverse collection of seasons, regions, and environments. To do so, forecasts of severe weather hazards were produced and verified as in previous studies using CAM output, namely by thresholding the updraft helicity (UH) field, smoothing the resulting binary field to create surrogate severe probability forecasts (SSPFs), and verifying the SSPFs against observed storm reports. SSPFs were most skillful during the spring and fall, with a relative minimum in skill observed during the summer. SSPF skill during the winter months was more variable than during other seasons, partly due to the limited sample size of events, but was often less than that during the warm season. The seasonal behavior of SSPF skill was partly driven by the relationship between the UH threshold and the likelihood of obtaining severe storm reports. Varying UH thresholds by season and region produced SSPFs that were more skillful than using a fixed UH threshold to identify severe convection. Accounting for this variability was most important during the cool season, when a lower UH threshold produced larger SSPF skill compared to warm-season events, and during the summer, when large differences in skill occurred within different parts of the continental United States (CONUS), depending on the choice of UH threshold. This relationship between UH threshold and SSPF skill is discussed within the larger scope of generating skillful CAM-based guidance for hazardous convective weather and verifying CAM predictions.
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Sobash, Ryan A., Craig S. Schwartz, Glen S. Romine, Kathryn R. Fossell, and Morris L. Weisman. "Severe Weather Prediction Using Storm Surrogates from an Ensemble Forecasting System." Weather and Forecasting 31, no. 1 (February 1, 2016): 255–71. http://dx.doi.org/10.1175/waf-d-15-0138.1.
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Abstract Probabilistic severe weather forecasts for days 1 and 2 were produced using 30-member convection-allowing ensemble forecasts initialized by an ensemble Kalman filter data assimilation system during a 32-day period coinciding with the Mesoscale Predictability Experiment. The forecasts were generated by smoothing the locations where model output indicated extreme values of updraft helicity, a surrogate for rotating thunderstorms in model output. The day 1 surrogate severe probability forecasts (SSPFs) produced skillful and reliable predictions of severe weather during this period, after an appropriate calibration of the smoothing kernel. The ensemble SSPFs exceeded the skill of SSPFs derived from two benchmark deterministic forecasts, with the largest differences occurring on the mesoscale, while all SSPFs produced similar forecasts on synoptic scales. While the deterministic SSPFs often overforecasted high probabilities, the ensemble improved the reliability of these probabilities, at the expense of producing fewer high-probability values. For the day 2 period, the SSPFs provided competitive guidance compared to the day 1 forecasts, although additional smoothing was needed to produce the same level of skill, reducing the forecast sharpness. Results were similar using 10 ensemble members, suggesting value exists when running a smaller ensemble if computational resources are limited. Finally, the SSPFs were compared to severe weather risk areas identified in Storm Prediction Center (SPC) convective outlooks. The SSPF skill was comparable to the SPC outlook skill in identifying regions where severe weather would occur, although performance varied on a day-to-day basis.
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K, Sathya, and Guruswamy K.P. "A Comprehensive Review: Topology, Modeling and Control Techniques of Resonant Converter for Electric Vehicle Applications." International Journal of Engineering and Advanced Technology 11, no. 5 (June 30, 2022): 125–28. http://dx.doi.org/10.35940/ijeat.e3607.0611522.
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This paper proposes the comprehensive review on the different resonant converter topologies, different modelling techniques, and different control techniques are being used in electric vehicle application. This paper also discusses the merits and demerits of different modulation/control techniques. The performance of variable frequency control technique can be improvised using SSPM is discussed in this paper. Optimal projectory control method has a quick transient response than SSPSM followed by SSOC, then PSM, and finally by VF controller are reviewed in detail in this study. Cyclic averaging is an accurate alternative method for state variable, this approach is used for time domain analysis of resonant dc-dc converter has been emphasized in this paper. Reverberation would be beneficial when series and parallel resonance converters combined are explained in this paper. LLC topology would be best suitable for electric vehicle applications are discussed and structure of the resonant converters, power efficiency, compatibility and its suitable applications are presented in this paper. A detailed study of modelling techniques to address the increasing demand for electric vehicles are presented.
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Zhang, Bin, Qin He Sun, and Wei Tong Liu. "Thermal Performance of a Shape-Stabilized Phase Change Material Floor with Different Heating Positions." Key Engineering Materials 717 (November 2016): 62–67. http://dx.doi.org/10.4028/www.scientific.net/kem.717.62.
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An effective method to reduce energy consumption for heating a building is by incorporating shape–stabilized phase change material (SSPCM) in building floors. In this study, a new type of SSPCM with increased thermal conductivity is formulated through a self–established experimental device. A model to analyze the thermal performance of the SSPCM floor is developed. The model is used to analyze the thermal performance of the SSPCM floor with two heating positions, one at the bottom and the other in the middle of the SSPCM. Results show that when the heating position is in the middle of the SSPCM, the melting speed is faster and the melting degree of SSPCM is larger than when it is at the bottom.
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He, Li Hong, Jing Ruo Li, and Hong Zhou Zhu. "Analysis on Application Prospect of Shape-Stabilized Phase Change Materials in Asphalt Pavement." Applied Mechanics and Materials 357-360 (August 2013): 1277–81. http://dx.doi.org/10.4028/www.scientific.net/amm.357-360.1277.
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Blends of asphalt and shape-stabilized phase change materials (SSPCM) were prepared by physical blending. Heat storage and thermal stability of asphalt-SSPCM blends were investigated by DSC and TG, chemical compatibility of asphalt-SSPCM blends was characterized by FT-IR, and the application feasibility of SSPCM in asphalt pavement was explored. The results show that asphalt-SSPCM blends have large phase change enthalpy, good thermal stability and chemical compatibility. Based on phase change theoretical analysis and numerical calculation, SSPCM applied in asphalt pavement can actively regulate and control pavement temperature using solar energy conversion or storage, lighten the asphalt pavement diseases related temperatures, enhance the performance of and prolong the service life of asphalt pavement, lower repair and maintenance cost, and enhance driving safety. At the same time, it can also saving energy sources and protect environment. Therefore, SSPCM have broad application foregrounds in asphalt pavement.
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Zeng, Changnv, Chaoxin Hu, and Wanwan Li. "Thermal Regulation Performance of Shape-Stabilized-Phase-Change-Material-Based Prefabricated Wall for Green Grain Storage." Materials 16, no. 3 (January 20, 2023): 964. http://dx.doi.org/10.3390/ma16030964.
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In order to meet the great demand for green grain storage and low carbon emissions, paraffin, high-density polyethylene (HDPE), and expanded graphite (EG) were used to produce shape-stabilized phase change material (SSPCM) plates, which were then used to reconstruct building walls for existing granaries. A new type of SSPCM plate was then prefabricated with different thermal conductivities and a high latent heat. This plate could be directly adhered to the existing granary walls. In order to evaluate the thermal regulation performance of these phase change granary walls, experiments and numerical methods were established, specifically for the summer condition. The thermal behavior of the SSPCM granary wall was compared with that of the common concrete granary wall to obtain the optimal parameters. It was concluded that increasing the thickness of the SSPCM layer can reduce the temperature rise of the wall. However, the maximum latent heat utilization rate and energy storage effects were obtained when the SSPCM thickness was at an intermediate level of 30 mm. The thermal conductivity of the SSPCM had a controversial effect on the thermal resistance and latent heat utilization behaviors of the SSPCM. Considering the temperature level and energy saving rate, a 30 mm thick SSPCM plate with a thermal conductivity of 0.2 W/m·K provided a superior performance. When compared to the common wall, the optimized energy-saving rate was greatly enhanced by 35.83% for the SSPCM granary wall with a thickness of 30 mm and a thermal conductivity of 0.2 W/m·K.
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Chen, Mei Zhu, Guang Ji Xu, Shao Peng Wu, and Wan Lu. "Preliminary Study on Asphalt Mortar Containing Shaped-Stabled Phase Change Material." Advanced Materials Research 306-307 (August 2011): 1702–6. http://dx.doi.org/10.4028/www.scientific.net/amr.306-307.1702.
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The objective of this study is to investigate the preliminary feasibility on the utilization of shaped-stabled phase change materials (SSPCM) in asphalt concrete to control pavement high-temperature. A comparative study has been conducted on the properties of asphalt with and without SSPCM. The properties investigated include basic and rheological performance along with temperature-controlling effect of asphalt mortars. The results show that there exist stiffening and “temperature lag” effect for asphalt mortar containing SSPCM, which indicates that it may be promising to use SSPCM to reduce high-temperature of asphalt pavement.
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Zeng, Qibin, Celine Sim, Anna Marie Yong, Hui Kim Hui, Yunjie Chen, Lei Zhang, Chee Kiang Ivan Tan, Huajun Liu, and Kaiyang Zeng. "Emerging multi-frequency surface strain force microscopy." Journal of Applied Physics 133, no. 4 (January 28, 2023): 040901. http://dx.doi.org/10.1063/5.0131075.
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During the past decade, Scanning Probe Microscopy (SPM) based surface strain detection techniques have been extensively used in the characterization of functional materials, structures, and devices. Here, we refer these techniques as Surface Strain Force Microscopy (SSFM), which mainly includes the Piezoresponse Force Microscopy, Atomic Force Acoustic Microscopy, Atomic Force Microscopy-Infrared spectroscopy (or photothermal induced resonance), Piezomagnetic Force Microscopy, and Scanning Joule Expansion Microscopy. The inception of SSFM opens up a pathway to study the nanoscale physical properties by using a sharp tip to detect the local field-induced surface strain. Through measuring the signals of the surface strain, multiple physical properties, such as the electromechanical, mechanical, photothermal, magnetic, thermoelastic properties, can be characterized with an unprecedented spatial resolution. In order to further develop and overcome the fundamental issues and limitations of the SSFM, the multi-frequency SPM technology has been introduced to the SSFM-based techniques, leading to the emerging of multi-frequency SSFM (MF-SSFM). As a technical breakthrough of the SSFM, MF-SSFM has demonstrated substantial improvements in both performance and capability, resulting in increased attentions and numerous developments in recent years. This Perspective is, therefore, aimed at providing a preliminary summary and systematic understanding for the emerging MF-SSFM technology. We will first introduce the basic principles of conventional SSFM and multi-frequency SPM techniques, followed by a detailed discussion about the existing MF-SSFM techniques. MF-SSFM will play an increasingly important role in future nanoscale characterization of the physical properties. As a result, many more advanced and complex MF-SSFM systems are expected in the coming years.
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Wilkenskjeld, Stiig, Frederieke Miesner, Paul P. Overduin, Matteo Puglini, and Victor Brovkin. "Strong increase in thawing of subsea permafrost in the 22nd century caused by anthropogenic climate change." Cryosphere 16, no. 3 (March 28, 2022): 1057–69. http://dx.doi.org/10.5194/tc-16-1057-2022.
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Abstract. Most earth system models (ESMs) neglect climate feedbacks arising from carbon release from thawing permafrost, especially from thawing of subsea permafrost (SSPF). To assess the fate of SSPF in the next 1000 years, we implemented SSPF into JSBACH, the land component of the Max Planck Institute Earth System Model (MPI-ESM). This is the first implementation of SSPF processes in an ESM component. We investigate three extended scenarios from the 6th phase of the Coupled Model Intercomparison Project (CMIP6). In the 21st century only small differences are found among the scenarios, but in the upper-end emission scenario SSP5–8.5 (shared socio-economic pathway), especially in the 22nd century, SSPF ice melting is more than 15 times faster than in the pre-industrial period. In this scenario about 35 % of total SSPF volume and 34 % of SSPF area are lost by the year 3000 due to climatic changes. In the more moderate scenarios, the melting rate maximally exceeds that of pre-industrial times by a factor of 4, and the climate change induced SSPF loss (volume and area) by the year 3000 does not exceed 14 %. Our results suggest that the rate of melting of SSPF ice is related to the length of the local open-water season and thus that the easily observable sea ice concentration may be used as a proxy for the change in SSPF.
Dissertations / Theses on the topic "SSPFM"
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Valloire, Hugo. "Développements de modes avancés de microscopie à force piézoélectrique pour films minces piézoélectriques et ferroélectriques." Electronic Thesis or Diss., Université Grenoble Alpes, 2024. http://www.theses.fr/2024GRALY063.
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De nombreuses applications actuelles dans le secteur de la microélectronique reposent sur l’utilisation de matériaux piézoélectriques et ferroélectriques sous forme de films minces. Par exemple, des dispositifs MEMS incluant les capteurs, actionneurs et convertisseurs d'énergie tirent profit des propriétés piézoélectriques des matériaux. Par ailleurs, l'émergence de nombreux sujets de recherche a fait suite à la découverte du potentiel de certains de ces matériaux pour les dispositifs microélectroniques. C’est par exemple le cas de l'utilisation du HfO2 pour ses propriétés ferroélectriques dans les mémoires non volatiles FeRAM et FeFET. Dans ce contexte, diverses techniques de dépôt de films minces de matériaux piézoélectriques et ferroélectriques sont actuellement en cours d'optimisation. Les méthodes de caractérisation spécifiques à ces matériaux sont essentielles pour évaluer la qualité de leur élaboration et pour approfondir la compréhension des phénomènes physiques sous-jacents, ce qui est crucial pour leur intégration dans des dispositifs microélectroniques avancés.C’est dans ce cadre que s’inscrit cette thèse, dont l’objectif est de développer des techniques de caractérisation des propriétés piézoélectriques et ferroélectriques de dispositifs élaborés sous forme de films minces, à l’échelle nanométrique. La microscopie à force piézoélectrique permet de telles analyses, mais est sensible à de nombreux artefacts, tels que les effets électrostatiques, qui peuvent significativement influencer les résultats. L'objectif de cette thèse est de développer, mettre en œuvre et coupler de nouvelles techniques avancées basées sur la microscopie à force piézoélectrique pour minimiser les artefacts de mesure en dissociant leur contribution de celle des effets piézoélectriques et ferroélectriques, et pour caractériser un éventail plus large de propriétés des matériaux. C’est par exemple le cas du mode couplé de microscopie à force piézoélectrique en spectroscopie de commutation avec suivi de résonance à double fréquence, développé pour la première fois durant cette thèse, permettant de maximiser le rapport signal sur bruit tout en réduisant et mesurant l'influence de divers artefacts. De plus, il permet de mesurer la variation des propriétés du matériau sous l'influence d'un champ électrique, reflétant ainsi des conditions d'utilisation plus réalistes. Ce mode a été étendu pour des mesures de cartographie permettant également de déterminer la variation des propriétés mesurées sur la surface du matériau à l’échelle nanométrique. Le développement d'un ensemble de programmes informatiques a joué un rôle clé dans l'élaboration de ces nouveaux modes, depuis le pilotage des équipements jusqu'à l'analyse avancée des mesuresMany current applications in the microelectronics sector rely on the use of piezoelectric and ferroelectric materials in the form of thin films. For instance, MEMS devices, including sensors, actuators, and energy harvesters, take advantage of the piezoelectric properties of materials. Moreover, the discovery of the potential of certain materials for microelectronic devices has spurred significant research, as exemplified by the use of HfO2 for its ferroelectric properties in non-volatile memories like FeRAM and FeFET. In this context, various deposition techniques for piezoelectric and ferroelectric thin films are currently under optimization. Specific characterization methods for these materials are essential to evaluate the quality of their fabrication and to enhance the understanding of the underlying physical phenomena, which is critical for their integration into advanced microelectronic devices.This thesis aims to develop characterization techniques for the piezoelectric and ferroelectric properties of devices fabricated as thin films at the nanoscale. Piezoelectric force microscopy enables such analyses but is susceptible to numerous artifacts, such as electrostatic effects, which can significantly impact the results. The objective of this thesis is to develop, implement, and combine new advanced techniques based on PFM to minimize measurement artifacts by separating their contributions from those of piezoelectric and ferroelectric effects, and to characterize a wider range of material properties. For instance, the coupled PFM mode in switching spectroscopy with dual-frequency resonance tracking, developed for the first time in this thesis, maximizes the signal-to-noise ratio while reducing and measuring the influence of various artifacts. Furthermore, this mode allows the measurement of material property variations under the influence of an electric field, thus reflecting more realistic operating conditions. This mode has been extended for mapping measurements, allowing the determination of variations in the measured properties across the material surface at the nanoscale. The development of a suite of software programs played a key role in the creation of these new modes, from equipment control to advanced data analysis
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Söderberg, Christina. "Individriktad brottsprevention : om SSPF och viljan att samverka." Licentiate thesis, Linköpings universitet, Institutionen för samhälls- och välfärdsstudier, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-125927.
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Denna licentiatuppsats behandlar brottspreventiv samverkan på individnivå, vilket är ett relativt nytt fenomen i Sverige och Skandinavien. Ett specifikt arbetssätt, samverkan mellan skola, socialtjänst, polis och fritidssektor – SSPF – undersöks i studien och övergripande studeras hur idén om brottspreventiv samverkan i form av SSPF konstrueras och motiveras, hur den tolkas och omtolkas av samverkansparterna samt hur den omsätts i praktik. Det mer specifika syftet med studien är att undersöka brottspreventiv samverkan på individnivå som idé och praktik. Tre olika fokus eller aspekter på detta belyses: policy/struktur; organisation/profession och praktik/familj. De frågeställningar som besvaras i studien och som är kopplade till ovanstående fokusområden är följande: Hur har denna form av samverkan runt unga växt fram och hur motiveras den? Hur ser de organisatoriska förutsättningarna ut och hur upplevs SSPF av samverkansparterna? Slutligen hur interagerar företrädare för samhällets institutioner/ de professionella med familjen? Tre kommuner ingår i undersökningen. Empiriskt material har samlats in genom dokumentstudie, intervjuer i grupp och enskilt med samverkansparterna i de tre kommunerna, genom observationer vid SSPF-möten samt genom en enkät som gick ut till 30 kommuner och stadsdelar i Sverige. Resultaten visar att en koppling finns mellan den allmänna samhällsutvecklingen i stort och brottspreventionens utveckling. Allmänt kan sägas att talet om brottsprevention idag handlar allt mindre om strukturella förklaringar och åtgärder. I stället talas alltmer om kontroll och effektivitet, vilket bland annat innebär tidiga upptäckter och snabba insatser. För att lyckas med detta behöver samverkan komma till stånd. Resultaten visar också att polisens roll i individriktad prevention har blivit viktigare och framträder som den tydligaste aktören i SSPFsamverkan. Gällande förutsättningarna för SSPF-arbetet visar studien att såväl organisatoriska förutsättningar som exempelvis stabilitet i organisationer och implementeringsmöjligheter, som möjligheter till informationsutbyte på individnivå mellan parterna spelar stor roll för arbetet. De professionella bildar allians där den gemensamma bilden av den unge skapar mening. En spänning mellan stöd och kontroll blir synlig i SSPF-arbetet, likväl som en sorts likriktning, där poliser agerar socialarbetare och socialtjänsten talar om mer kontroll. Allians bildas också mellan professionella och föräldrar, vilket främst syftar till ökad kontroll runt den unge, men också till att stärka stödet till den unges föräldrar. De professionellas strävan efter ett nytt sätt att arbeta för att göra det bättre för målgruppen blir trots allt tydligt i studien.This dissertation deals with crime prevention co-operation targeted at the individual level, a relatively new phenomenon in present Sweden and Scandinavia. A certain work model – SSPF, collaboration between school, social services, the police and the leisure sector – is chosen for the study. The study's purpose is to investigate crime prevention co-operation on individual level as idea and practice. To this end, different focuses are used: policy/structure; organization/profession and practice/family. The questions the study answers attached to the focus areas above are the following: How has this form of interaction around the young emerged and how is it justified? What are the organizational conditions and how is SSPF experienced by collaborative partners? What does the interaction look like between those representing society´s institutions as well as between the professionals and the families? Three municipalities are examined in the study. The empirical material was collected through studies of documents; interviews, in groups and individually, with collaborative partners in the three municipalities; observations at SSPF-meetings and a survey that were sent to a number of municipalities and districts in Sweden. On an overall level, the results show that a clear link exists between the general development of society at large and the development of crime prevention work. Generally it can be said that talk of crime prevention today is less focused on structural explanations and action, but rather increasingly concerns control and efficiency, including early discoveries and rapid reaction, which should be strengthened through collaboration at work. The role of the police in individually targeted prevention has become more important and they can be seen clearly as the most dominant party in the SSPF-interaction. Regarding the current conditions for SSPF-work, the study shows that both the organizational prerequisites (such as stability in organizations), and implementation (such as opportunities for exchange of information at the individual level between the parties) play a major role. The professionals form an alliance in which the common image of the young creates meaning. A tension between support and control becomes visible in the work, as well as a kind of uniformity – iso-morphism- whereby the police acting social workers and the social service talk about more control. An alliance is also formed between professionals and parents, aiming mainly at gaining increased control concerning the young person, but also at strengthening support to the parents. The professional´s quest for a new way of working to make it better for the target group becomes clear in the study. In conclusion: this kind of collaborative work within the area of crime prevention is complex, and this study is a contribution to a better understanding of the subject.
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Byttner, Cajsa, and Tengvall Lisa Olsson. "Samverkan i form av SSPF : Är det rätt väg att gå?" Thesis, Uppsala universitet, Centrum för socialt arbete - CESAR, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-352509.
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I vår studie har vi undersökt hur samverkan inom verksamheten SSPF (samverkan mellan skola, socialtjänst, polis och fritid) i Uppsala kommun fungerar enligt aktörerna. Vi avsåg att undersöka aktörernas uppfattning av hur samverkan fungerar och ifall uppfattningen skiljde sig mellan de olika yrkesgrupperna. Fokus för uppsatsen var således inte att mäta effekterna av insatser som utförts via SSPF:s verksamhet. Studien har utgått från tidigare forskning om lyckad samverkan genom engagemang, lyhördhet, tillgänglighet och tillit, samt omständigheter som utgör hinder för samverkan såsom; bristande samsyn, oförståelse för andra aktörers uppdrag och skiljande regleringar. Detta, tillsammans med vårt teoretiska ramverk, gav en övergripande bild av forskningsfältet och verkade som underlag för analys och diskussion kring resultatet. Det teoretiska ramverket bestod av begrepp som gräsrotsbyråkrati, roller och handlingsutrymme som alla kopplas samman till begreppet samverkan. Det empiriska materialet bestod av data från vår genomförda enkätstudie om SSPF–samverkan i Uppsala kommun. Till den jämförande analysen genomfördes Chi 2 – tester. Utifrån resultatet kunde vi utläsa att aktörerna inom SSPF ansåg att samverkan hade bidragit till nytta i störst utsträckning i form av "Informationsutbyte", "Helhetssynen på ungdomar i riskfyllda situationer" och "Kontaktvägar". De förhållanden som aktörerna ansåg utgjorde hinder för SSPF-samverkan i störst utsträckning var "Bristande ekonomiska resurser", ""Krockande" lagstiftning och regelverk" och "Bristande personalresurser". Mellan yrkesgrupperna skola, socialtjänst och fritid förekom signifikanta skillnader för variabeln ""Krockande" lagstiftning eller regelverk” som hinder för SSPF-samverkan. För yrkesgrupperna skola och fritid fanns signifikanta skillnader för variablerna ”Bristande personalresurser” som hinder och ”Kontaktvägar” som nytta. Slutligen påvisades även signifikanta värden mellan yrkesgrupperna socialtjänst och fritid gällande ”Bristande/oklart beslutsmandat”.
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Holmberger, Maria, and Hannah Nilsson. "Barn som lever farligt eller farliga barn? : en studie om samverkan kring och synen på barn och ungdomar i riskzon för att begå brott." Thesis, Ersta Sköndal Bräcke högskola, Institutionen för socialvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:esh:diva-8217.
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Syftet med den här studien handlar om att undersöka och analysera hur aktörer inom det brottsförebyggande samverkansprojektet SSPF, som är en förkortning för Socialtjänst, Skola, Polis och Fritid, ser på och pratar om barn och ungdomar i riskzon för att begå brott, samt hur de erfar en samverkansprocess kring målgruppen. Vi har sett att det existerar två parallella synsätt på barn och ungdomars brott som vi har valt att benämna som; barn som lever farligt och farliga barn. Dessa sätt att se på och prata om barn och ungdomar i riskzon har varierat och uttalats sedan senare del av 1800-talet. Utifrån att SSPF består av aktörer med utgångspunkter i olika lagar och riktlinjer så förstår vi att samverkan är komplex och utmanande. Därav vårt intresse för att undersöka och analysera hur synsätten uttrycks i samverkan. Vi utgick från en kvalitativ forskningsansats där vi genomförde åtta semistrukturerade intervjuer med aktörer inom SSPF i utvald kommun. Dessa aktörer utgörs av; områdespolis, samordnare för SSPF, ungdomssamordnare för ungdomsteam, teamledare på fritidsgård, socialsekreterare på barn- och familjeenheten, behandlare på MiniMaria samt två biträdande rektorer för årskurs 7-9 från olika skolor. Resultatet av studien visade att de båda synsätten tar plats i SSPF. Detta eftersom respondenterna uppgett att barn och ungdomar är skyddsvärda på olika sätt. Erfarenheterna utifrån synsätten är att barn och ungdomar i riskzon som lever farligt behöver skyddas, men även en omgivning behöver skyddas från farliga barn. När samhället behöver träda in och ge konsekvenser och påföljder kan det enligt respondenterna leda till stämpling. Det synsätt som getts mest utrymme i samverkansprocessen har av studiens resultat visat sig vara barn som lever farligt. Resultatet har även visat att samordnaren för SSPF har en betydelsefull inverkan på arbetsgruppens synsätt. I analysen utgick vi från ett socialkonstruktivistiskt perspektiv, stämplingsteorin, bakgrund samt tidigare forskning om samverkan för att förstå resultatet. I en avslutande diskussion lyfter vi ålderns betydelse för synsättens utrymme utifrån SSPF:s målgrupp, 13-16 år. Vi för även en diskussion kring vilka risker som finns i användningen av de olika synsätten. I diskussionen lyfter vi även vikten av att aktörerna i SSPF är medvetna om att det finns en risk för att barn och ungdomar i riskzon kan känna sig stämplade av att få SSPF som insats. Att synsättet barn som lever farligt ges mest utrymme i SSPF resonerade vi kring ligger i linje med vad som förespråkas i barnkonventionen.The purpose of this study is to investigate and analyze how actors in the crime prevention collaborative project Social Services, School, Police and Leisure (SSPF), look at and talk about children and adolescents at risk of committing crimes, and how they experience a collaborative process around the target group. We have identified two parallel approaches to the crimes of children and adolescents that we call; children living dangerously and dangerous children. These approaches of looking at and talking about children and adolescents at risk have varied over time and have been acknowledged since the latter part of the 19th century. Based on the fact that SSPF consists of actors with their background from different laws and guidelines, we understand that collaboration is complex, hence our interest in investigating and analyzing how these approaches are expressed. We chose to take on a qualitative research approach where we conducted eight semi-structured interviews with actors within SSPF in a selected municipality. These actors consisted of; the police, the coordinator for SSPF, the youth coordinator for the youth team, the team leader at the community youth center, a social secretary at the children and family unit, a therapist at MiniMaria and two assistant principals for classes 7-9 from different schools in the district. The results of the study showed that both identified approaches are used by SSPF. This is because the respondents stated that children and young people need different types of protection. Their experience regarding the approaches is that children and adolescents at risk of living dangerously need protection, but also that a surrounding needs to be protected from dangerous children. According to the respondents, when society needs to provide consequences and sanctions, it can lead to a labeling process. The approach that has been utilized the most in the collaboration process was proven to be children living dangerously based on our studies. The result has also shown that the coordinator for SSPF has a significant impact on the approach of the working group. In the analysis we used a social constructivist perspective, labeling theory, background and previous research on collaboration to understand the result. In a concluding discussion, we highlight the importance of age for the scope of the approach based on the SSPFs target group, 13-16 years. We also discuss the risks involved in using the different approaches separately. In the discussion, we also highlight the importance of the actors within SSPF to be aware that there is a risk that children and adolescents at risk of committing crimes may feel stigmatized by having SSPF as an intervention. Furthermore we discussed the fact that the approach children living dangerously has been given the most room in SSPF and established that the result is according to what is advocated in the Children's Convention.
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Avesand, Johan, and Michael Haile. "SSPF - Umeåmodellen : En studie om upplevelser av behov kring tvärsektoriell samverkan och prevention av ungdomskriminalitet i Umeå kommun." Thesis, Umeå universitet, Institutionen för socialt arbete, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-177729.
Full textAbstract:
Detta examensarbete är en kvalitativ studie som utgår från en abduktiv ansats. Studiens teoretiska ramverk utgörs av programteori. Syftet med studien var att undersöka vilka upplevelser kring tvärsektoriell samverkan som föreligger för att optimera en anpassad SSPF-modell i Umeå kommun. Målsättningen var att i slutet av studien presentera en skräddarsydd SSPF-modell anpassad efter Umeå kommuns lokala behov, förutsättningar och begränsningar. Resultatet av studien är sammanställt enligt en SWOT-analys för att identifiera och analysera faktorer som påverkar organisatorisk effektivitet. Studiens resultat visar att respondenter från socialtjänst, skola, polis, fritid och förening ställer sig positiva till tvärsektoriell samverkan under systematiserade former. De samverkansförsvårande omständigheter som framhålls är av organisatorisk karaktär och avser bristande samsyn kring verksamhetens syfte och mål samt implementering. Sekretess framhålls som ett enskilt utvecklingsområde som behöver överbryggas med juridiskt hållbara lösningar. Sekretess beskrivs försvåra det tvärsektoriella informationsutbytet och därmed utformningen av effektiva interventioner. Utöver en stark förankring hos lokala politiker och beslutsfattare kan den organisatoriska placeringen av ett tilltänkt tvärsektoriellt samverkansforum få följder för dess varaktighet, fortlevnad och effekt.
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Uhr, Isabelle, and Ronja Landstedt. ""Samverkan är framtidens melodi” : En kvalitativ intervjustudie om socialtjänst, skola, polis och fritids samverkan kring ungdomar i riskzon för kriminalitet och missbruk." Thesis, Jönköping University, HHJ, Avd. för socialt arbete, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-51726.
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Syftet med studien är att undersöka samverkan mellan socialtjänst, skola, polis och fritid vid förebyggande arbete mot ungdomskriminalitet. Studien utgår ifrån en kvalitativ forskningsmetod genom att semistrukturerade intervjuer genomförts med yrkesverksamma inom samverkansformen SSPF (socialtjänst, skola, polis, fritid) i en landsbygdskommun i Sverige. Materialet analyserades genom en tematisk analys och därigenom framkom fyra huvudteman: organisering av SSPF i en landsbygdskommun, professionellas erfarenheter av SSPF-samverkan, variationer i de professionellas uppfattningar om SSPF och verksamhetens utvecklingsmöjligheter. Resultatet av studien analyserades med hjälp av tidigare forskning kring ämnet och Horwath och Morrisons samverkansmodell. Utifrån intervjuerna framkommer det att landsbygdskommunen använder samverkansmodellen SSPF för att arbeta förebyggande mot ungdomar i riskzonen för kriminalitet och missbruk. Det belyses att en styrgrupp, arbetsgrupp och samordnare är centralt för organiseringen av SSPF-samverkan. Gynnsamma faktorer som framkommer för SSPF-samverkan är en samordnare, förmedling av samt förståelse för syfte och mål med SSPF och relevanta personer i SSPF-forumet. Förhindrande faktorer som framkommer för SSPF-samverkan är socialtjänstens lagstiftning och att det i SSPF-forumet i första hand lyfts ungdomar som är kända hos aktörer.The aim of this study is to examine collaboration between social services, school, police, and leisure sector when working preventive against youth criminality. Semi-structured interviews were conducted with professionals within the collaboration-model SSPF in a Swedish rural municipality. The research questions were investigated by conducting a thematic analysis of the data. Four main themes emerged in the analysis: organization of SSPF in a rural municipality, professionals experiences of SSPF collaboration, variations in professionals’ perceptions of SSPF and the potentialities of the operations. The results of the study were analyzed using previous research around the subject and Horwath and Morrison’s collaboration model. The interviews demonstrated that the rural municipality uses the collaboration model SSPF to work preventively for young people at risk for crime and addiction. A steering group, working group and a co-ordinator appeared significant for the organization of SSPF collaboration. Favourable factors for the SSPF collaboration that appeared were a co-ordinator, communication and understanding of the purpose and goals of SSPF, and appropriate members in the SSPF forum. Preventive factors of the SSPF collaboration included the legislation of the social services and the principle that in SSPF it was mainly young people who were already known by the participants that were discussed.
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Engwall, Sofia, and Sofie Fredriksson. "“Vårt motto är att vi skapar världsmedborgare” : Yrkesverksammas preventionsarbete för att motverka barn och ungas normbrytande beteende." Thesis, Linnéuniversitetet, Institutionen för pedagogik och lärande (PEL), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-102400.
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Syftet med studien var att se hur yrkesverksamma inom skola, socialtjänst, polis och fritid (SSPF) beskriver sitt preventiva arbete för att motverka ett normbrytande beteende hos barn och unga. Den metodologiska utgångspunkten i studien var en kvalitativ ansats med ett hermeneutiskt synsätt. Vidare har vi även utgått från sociokulturell teori för att förstå interaktioners betydelse i samspel med förändringsprocesser. Studien baserades på fem kvalitativa semi-strukturerade intervjuer med yrkesverksamma som är i kontakt med barn och unga dagligen. De viktigaste resultaten som framkom i studien var relationens betydelse i förändringsarbetet tillsammans med barn och unga. Utöver en god relation ses ett informellt bemötande och förhållningssätt vara framgångsrika faktorer. Samverkan ses som ett dilemma hos samtliga respondenter där det å ena sidan ses som en framgångsfaktor, å andra sidan som en motgång. Ett preventivt arbete kräver medhåll från samtliga parter där vårdnadshavares motstridighet samt ungas syn på auktoritet försvårar arbetet. I studien framkom också hur viktigt arbetet är, trots svårigheter gällande resurser, ungdomarnas attityder och brister i samverkan. Intressant är att det finns en vilja hos både skola, socialtjänst, polis och fritid att arbeta mot samma mål - att förebygga och motverka barn och ungas normbrytande beteende.
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Konnoff, Daniel C. "SSPM-based optical fiber radiation dosimeter." Thesis, 2012. http://hdl.handle.net/1957/28760.
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Current state-of-the-art environmental, clinical, and in-vivo radiation sensing systems utilizing various inorganic and tissue-equivalent plastic scintillators are not user
friendly, suffer from electron-beam-generated noise, and are difficult to deploy successfully
for real-time dosimetry. A robust, real-time detection system using different scintillating
materials coupled to solid-state detectors by optical fibers is developed. This system enables radiation monitors/clinicians to conduct meaningful real-time measurements using
different inorganic scintillators or organic, tissue-equivalent plastic scintillators in harsh
clinical and environmental environments.
Recent solid state photomultiplier (SSPM) technology has matured, reaching a performance level that is suitable for replacement of the ubiquitous photomultiplier tube in
selected applications for environmental radiation monitoring, clinical dosimetry, and medical imaging purposes. The objective of this work is laboratory and clinical testing of the
Hamamatsu MPPC (S10362-11-050C), Photonique SSPM (0810G1), and Voxtel SiPM
(SQBF-EKAA/SQBF-EIOA) SSPMs coupled to different inorganic scintillator crystals
(Prelude 420, BGO), inorganic doped glass scintillator material SiO₂: Cu²⁺, and organic
BCF-12 plastic scintillating fibers, used as detector elements. Both polymer optical fibers
(POFs) and glass optical fibers (GOFs) are used as signal conduits for laboratory and
clinical testing. Further, reduction of electron-beam-generated Cerenkov light in optical
fibers is facilitated by the inclusion of metalized air-core capillary tubing between the
BCF-12 plastic scintillating fiber and the POF.
Dose linearity, percent depth dose, and angular measurements for 6 MV/18 MV
photon beams and 9 MeV electron beams are compared using the Hamamatsu MPPC
with-and without the use of the metalized air-core capillary tubing for BCF-12 plastic
scintillating fiber. These same measurements are repeated for SiO₂: Cu²⁺ scintillator
material without air-core capillary tubing.Graduation date: 2012
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Zhuchyna, Olena. "“Getting the agencies together”: a qualitative study of the professionals’ perceptions of collaboration in prevention of juvenile criminality." Master's thesis, 2016. http://hdl.handle.net/10071/12452.
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Interagency collaboration is increasingly recognized as an effective approach in prevention of crimes among young population. Sweden along with Denmark and Norway was among the pioneers in introducing the platform for information exchange between social services, schools, police and the recreational centers for youth, those agencies having the primary contact with young people. In doing so, the professionals involved found a way to address the issue of juvenile criminality together, pooling the resources and collecting essential information that they would otherwise not be able to access on their own. The aim of this qualitative study was to explore the perceptions of relevant professionals from social services, schools, police and the recreational centers on collaboration in prevention of juvenile criminality in the city of Gothenburg. In particular, understand professionals’ perspectives on their roles in collaboration, reflect on its strengths and weaknesses, and discover the role of a coordinator. In-depth qualitative interviews were conducted with 20 respondents (including one e-mail interview) representing each of the agencies and the coordinators. Insights from the Ecological systems theory (Bronfenbrenner, 1979) and the Craftsmanship theory of interagency collaboration (Bardach, 1998) were borrowed as a theoretical framework for the current study. Content analysis as an analytic strategy allowed to identify the recurring themes in the empirical data.
The findings allowed to conclude that collaboration was conceptualized by professionals as an effective approach featuring trust, mutual understanding of the roles and responsibilities, communication and continuous information sharing as the pillars of collaboration. The dominating perceptions of collaboration related to the comprehensive character and integrated approach it has. In particular, collaboration was recognized as a platform for information exchange between partners, collective decision-making, and early identification of youth at risk with each partner’s contribution equally important. The study recognized that coordinators are assigned critical roles in collaboration, such as performing organizational responsibilities along with the casework. However, varying time commitments significantly affect their ability to answer the expectations of the team members. Coordinators and team members had similar expectations as to the skills, personal qualities and knowledge that coordinators should possess, yet, their points of view divided with regards to coordinator’s qualification. Despite general encouragement of collaborative practice and desire to work together, the study revealed significant barriers to collaboration, such as issues with information sharing and confidentiality, insufficient communication, police reorganization, power relations and status differences, inadequate follow up of the cases as well as problems related to prioritizing collaboration.
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YANG, WEI-SHENG, and 楊位盛. "數值分析建築物整合鋪設穩態形狀相變材料板(SSPCM)及主動式外表帷幕系統(ABE)之空調效應." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/39774329453476314003.
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碩士中華大學
機械工程學系碩士班
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The laying of the building walls and ceilings in the shape of steady-state phase change material plates (SSPCM), and active exterior curtain systems integration (ABE) to form hybrid systems, numerical analysis of ventilation in the summer night, the steady-state phase change material plates shape effect, the time for the entire summer. The impact of indoor air temperature for the factors one by one for research, the following factors are: steady-state shape phase change material thermal physical properties, thickness, air change per hour during the day and night, the amount of (ACH), also combined with active appearance curtain system drive power requirements, heat sink efficiency and cooling / heat load caused by thermocouple number of TE and other factors taken into account, for the completion of the feasibility of this hybrid system for analysis and evaluation, and air-conditioning under different operating conditions performance and indoor temperature will be studied. In order to improve the thermal efficiency of buildings and the use of air-conditioning system to provide heat during the day and night to provide energy-saving heating or air-conditioning and other energy-saving, this study analyzed the paraffin wax shape-stabilized phase change material by numerical approach and compared with results of the literature. I hope this work can contribute to a healthy and comfortable living environment for the dream come true.
Books on the topic "SSPFM"
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Bolivia. Seguro de salud para el adulto mayor "SSPAM": Normativa legal : movilizados por el derecho a la salud y a la vida. La Paz, Bolivia: Ministerio de Salud y Deportes, 2008.
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A, Brown Joseph. Estimating and bidding for the space station processing facility, or space station processing facility government estimating, or Aerospace price book, volume IV, or how the government estimating was so accurate, or how the low bidder got low on SSPF, for AACE International 37th annual meeting, Dearborn, Michigan, July 11-14, 1993. [Washington, DC: National Aeronautics and Space Administration, 1993.
Find full textBook chapters on the topic "SSPFM"
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Eberhard, P. H., P. G. Kwiat, M. D. Petroff, M. G. Stapelbroek, and H. H. Hogue. "Detection Efficiency and Dark Pulse Rate of Rockwell (SSPM) Single Photon Counters." In Applications of Photonic Technology, 471–74. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4757-9247-8_89.
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Aksoy, Yazgı Badem, Gülen Çağdaş, and Özgün Balaban. "A Model for Sustainable Site Layout Design of Social Housing with Pareto Genetic Algorithm: SSPM." In Communications in Computer and Information Science, 113–33. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-47386-3_7.
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Kumar, Purushottam, Vishal Rathore, and K. B. Yadav. "Calculation of Torque Ripple and Derating Factor of a Symmetrical Six-Phase Induction Motor (SSPIM) Under the Loss of Phase Conditions." In Nanoelectronics, Circuits and Communication Systems, 441–53. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-7486-3_40.
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Christian, James F., Kanai S. Shah, and Michael R. Squillante. "Advances in CMOS SSPM Detectors." In Biological and Medical Sensor Technologies, 301–38. CRC Press, 2017. http://dx.doi.org/10.1201/b11529-13.
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Parvahan, Pouyan, and Andreas Drechsler. "Strategic Software Project Governance and Learning through Project Portfolio Management." In Advances in IT Personnel and Project Management, 118–37. IGI Global, 2015. http://dx.doi.org/10.4018/978-1-4666-7473-8.ch006.
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The management of multi-project situations is a challenge for many software companies. Often, techniques are missing to prioritize, classify, or categorize software projects. Sometimes, no standardized project feasibility evaluations are performed before their start. As a consequence, organizations may have to allocate more resources than available to their projects. In turn, projects are accepted despite existing resource shortages. In such cases, actual dependencies between projects are not visible and handled properly. When conflicts between projects are not transparent, redundancies cannot be avoided and strategic synergies cannot be generated. Due to the special nature of software projects, these issues become exacerbated within complex software project landscapes. In addition, it is important to enhance the quality of future strategic decisions by learning from consequences of earlier ones. In order to address these challenges, this chapter presents a comprehensive approach for Strategic Software Project Portfolio Management (SSPPM), enhanced by institutionalized organizational learning.
Conference papers on the topic "SSPFM"
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Fei, Jianxiong, Anlin Yi, Junling Huang, Lianshan Yan, Xingchen He, Lin Jiang, Bin Luo, and Wei Pan. "A Fast Fiber Channel Modelling Based on Koopman Neural Operator for PDM Signal Transmission." In CLEO: Applications and Technology, JTu2A.94. Washington, D.C.: Optica Publishing Group, 2024. http://dx.doi.org/10.1364/cleo_at.2024.jtu2a.94.
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A 1600km PDM optical fiber channel modeling using Koopman Neural Operator is proposed. It provides relatively high efficiency comparable to 160-StPs-SSFM, while especially reducing its time consumption (Running time decreased from 34s to only 0.01s).
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Mejía-Vega, O. A., M. O. Chacón-Carrero, M. Trejo-Durán, M. Cano-Lara, and E. Alvarado-Méndez. "Self-diffraction rings in organic materials with Gelite Bloom and Hibiscus Sabdariffa." In Frontiers in Optics, JD4A.97. Washington, D.C.: Optica Publishing Group, 2024. https://doi.org/10.1364/fio.2024.jd4a.97.
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An experimental and numerical study of the nonlinear optical properties of hibiscus sabdariffa in gelite bloom is shown. Using the Z-scan technique and a λ = 477 nm cw variable power Ar laser, nonlinear absorption was measured, which is the main contribution to the nonlinear refractive index. Hibiscus sabdariffa presents large phase changes at low powers, which causes spatial self-phase modulation (SSPM) effects. Our experimental results show a high agreement with the numerical model of thermal lens formation used.
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Dokhale, P., C. Stapels, J. Christian, Yongfeng Yang, S. Cherry, W. Moses, and K. Shah. "Performance measurements of a SSPM-LYSO-SSPM detector module for small animal positron emission tomography." In 2009 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC 2009). IEEE, 2009. http://dx.doi.org/10.1109/nssmic.2009.5401653.
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Cortés, Gustavo, and Judy Liu. "Lateral Resistance Using Steel Slit Panel Frames (SSPFs)." In Structures Congress 2009. Reston, VA: American Society of Civil Engineers, 2009. http://dx.doi.org/10.1061/41031(341)157.
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Baker, Stuart A., Christopher Stapels, J. Andrew Green, Ronald E. Guise, Jason A. Young, Larry Franks, Britany Stokes, and Elizabeth Wendelberger. "SSPM scintillator readout for gamma radiation detection." In SPIE Optical Engineering + Applications, edited by Gary P. Grim and Richard C. Schirato. SPIE, 2011. http://dx.doi.org/10.1117/12.895195.
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Bharat, R. "Ultra-Sensitive Infrared and Visible Photon Detector." In Space Optics for Astrophysics and Earth and Planetary Remote Sensing. Washington, D.C.: Optica Publishing Group, 1988. http://dx.doi.org/10.1364/soa.1988.tud1.
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The Solid State Photomultiplier (SSPM) is a photon detector based on impurity band conduction (IBC) in semiconductors. The high internal gain (over 50,000) in the device and its fast response (rise time less than 10 ns) combine to permit the detection of single photons over a wide spectrum. The SSPM is a two-terminal device that can operate continuously with a dc bias, yielding an output current pulse for each detected photon. Quantum efficiencies of over 5036 have already been achieved at wavelengths of 0.45 and 20 micrometers using arsenic-doped silicon (Si:As) for the IBC region; even higher values are possible, not only through the addition of anti-reflection coatings but also by the design of device structures optimized for specific wavelength ranges. Currently available Si:As SSPMs operate best at temperatures between 6 and 10K. Pulse count rate densities in excess of 109 per cm2−s have been achieved when an SSPM of typical size (10−4 to 10−2 cm2) is used in conjunction with suitable readout electronics. As the amplitude of the output pulses is large compared to the noise of the readout electronics and the pulse height distribution is quite tight, processing of the output signals can be handled rather conveniently by digital computers without the need for analog-to-digital converters.
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He, Xingchen, Lianshan Yan, Lin Jiang, Anlin Yi, Zhengyu Pu, Youren Yu, Wei Pan, and Bin Luo. "Data-driven Optical Fiber Channel Modeling Using Fourier Neural Operator." In CLEO: Science and Innovations. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleo_si.2022.sm4j.6.
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We utilize Fourier neural operator to accurately model a 1200km optical fiber channel. It can achieve similar performance compared with SSFM, while with lower computational complexity (the running time is reduced from 30s to 0.09s).
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Dokhale, Purushottam, Rohan Nagarkar, Rob Robertson, Mickel McClish, Christopher Stapels, James Christian, Gerald Entine, Michael Squillante, Simon Cherry, and Kanai Shah. "Performance measurements of CMOS SSPM as PET detector." In 2007 IEEE Nuclear Science Symposium Conference Record. IEEE, 2007. http://dx.doi.org/10.1109/nssmic.2007.4436826.
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Eikenberry, Stephen S., Giovanni G. Fazio, and Scott M. Ransom. "SSPM-based high-speed infrared photometer for astronomy." In SPIE's 1995 Symposium on OE/Aerospace Sensing and Dual Use Photonics, edited by Albert M. Fowler. SPIE, 1995. http://dx.doi.org/10.1117/12.211258.
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Nayak, Sudhanshu Kumar, Md Soif Ahmed, Chinmay Barman, Rahul Murali, Bota Bhavani, Seelam Prasanthkumar, Lingamallu Giribabu, and Sai Santosh Kumar Raavi. "Nonlinear Coherent Light-matter Interaction: Promising all-Optical Switching, Logic Gate and Optical Limiting Applications." In JSAP-Optica Joint Symposia. Washington, D.C.: Optica Publishing Group, 2023. http://dx.doi.org/10.1364/jsapo.2023.21a_p01_6.
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Spatial self-phase modulation (SSPM) is a nonlinear optical (NLO) coherent interaction between light and matters. The phase gets self-modulated due to the change of nonlinear refractive index through the nonlinear Kerr effect and produce diffraction rings at the far fields. [1] Porphyrins are the organic molecules with π-conjugation electron rich systems, they possess delocalized electric field distribution and large dipole moments that lead to have significant electrical polarization, which is a profit for higher NLO response. These molecules have various application in photovoltaics, photonics, optoelectronics, etc. [2, 3] Herein, we report the NLO properties of four metalated porphyrin-napthalimide based donor-acceptor systems named as PN-Zn, PN-Ni, PN-Cu, and PN-Fb using SSPM and continuous wave (CW) Z-scan method for exploring various optoelectronic applications like optical limiting, optical switching, and logic gates, etc.
Reports on the topic "SSPFM"
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Cipiti, Benjamin B., and Nathan Shoman. Integration of the SSPM and STAGE with the MPACT Virtual Facility Distributed Test Bed. Office of Scientific and Technical Information (OSTI), August 2017. http://dx.doi.org/10.2172/1375573.
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