Hochschule für Technik FHNW

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https://irf.fhnw.ch/handle/11654/35

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Auflistung Hochschule für Technik FHNW nach Schlagwort "330 - Wirtschaft"

Gerade angezeigt 1 - 5 von 5
  • Vorschaubild nicht verfügbar
    Publikation
    Hygroscopic properties of fresh and aged wood burning particles
    (Elsevier, 2013) Martin, Maria; Tritscher, Torsten; Jurányi, Zsófia; Heringa, Maarten F.; Sierau, Berko; Weingartner, Ernest; Chirico, Roberto; Gysel, Martin; Prévôt, André S.H.; Baltensperger, Urs; Lohmann, Ulrike [in: Journal of Aerosol Science]
    01A - Beitrag in wissenschaftlicher Zeitschrift
  • Vorschaubild nicht verfügbar
    Publikation
    Secondary organic aerosol formation by irradiation of 1,3,5-trimethylbenzene−NOₓ-H2O in a new reaction chamber for atmospheric chemistry and physics
    (American Chemical Society, 12.03.2005) Paulsen, Dwane; Dommen, Josef; Kalberer, Markus; Prévôt, André S.H.; Richter, René; Sax, Mirjam; Steinbacher, Martin; Weingartner, Ernest; Baltensperger, Urs [in: Environmental Science & Technology]
    A new environmental reaction smog chamber was built to simulate particle formation and growth similar to that expected in the atmosphere. The organic material is formed from nucleation of photooxidized organic compounds. The chamber is a 27 m³ fluorinated ethylene propylene (FEP) bag suspended in a temperature-controlled enclosure. Four xenon arc lamps (16 kW total) are used to irradiate primary gas components for experiments lasting up to 24 h. Experiments using irradiations of 1,3,5-trimethylbenzene−NOₓ−H2O at similar input concentrations without seed particles were used to determine particle number and volume concentration wall loss rates of 0.209 ± 0.018 and 0.139 ± 0.070 1/h, respectively. The particle formation was compared with and without propene.
    01A - Beitrag in wissenschaftlicher Zeitschrift
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    Publikation
    The Effects on social support and work engagement with scrum events
    (IEEE, 2021) Müller, Debora; Kropp, Martin; Anslow, Craig; Meier, Andreas [in: 2021 IEEE/ACM 13th International Workshop on Cooperative and Human Aspects of Software Engineering (CHASE)]
    One of the core values of the Agile Manifesto is “individuals and interactions over processes and tools.” Scrum implements interaction through key events (Sprint, Sprint Planning, Daily Scrum, Sprint Review, and Retrospective). There is limited work done on how these events influence perceived social support and work engagement. This paper examines perceived social support as a strengthening factor on work engagement in an agile work environment. Drawing upon the Job Demands-Resource Model, the research question is how do Scrum events relate to social support and what effect do they have on work engagement? We conducted an online survey with 132 Scrum professionals and analyzed the data using structural equation modelling. Results show that the Scrum event Retrospective strengthened social support. Moreover, social support is positively related to work engagement. The research contributes to the limited empirical understanding on perceived social support as well as work engagement in an agile work environment. It provides companies with an understanding of the importance of Retrospectives as a Scrum event.
    04B - Beitrag Konferenzschrift
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    Publikation
    Understanding Leadership in Agile Software Development Teams: Who and How?
    (Springer, 09.06.2022) Weichbrodt, Johann; Kropp, Martin; Biddle, Robert; Gregory, Peggy; Anslow, Craig; Bühler, Ursina Maria; Mateescu, Magdalena; Meier, Andreas; Stray, Viktoria; Stol, Klaas-Jan; Paasivaara, Maria; Kruchten, Philippe [in: Agile Processes in Software Engineering and Extreme Programming. XP 2022]
    In this paper we report on a study of the nature of different aspects of leadership in agile teams. We used an established model of leadership, distinguishing transactional and transformational styles, and asked IT professionals a set of questions about the leadership they experience, both from direct supervisors (hierarchical leadership) and from the team itself (shared leadership). Our results show that agility is indeed related to the transformational style, but that the transactional style also plays a part, especially as shared leadership. Furthermore, even in highly agile software development, leadership by direct supervisors still plays an important role. We propose that, as software development becomes more agile, the transactional aspects of leadership may shift away from the leadership dyad between supervisor and employee into the agile team, while transformational leadership is important for both the team and supervisors.
    04B - Beitrag Konferenzschrift
  • Vorschaubild nicht verfügbar
    Publikation
    Using aerosol light absorption measurements for the quantitative determination of wood burning and traffic emission contributions to particulate matter
    (American Chemical Society, 02.04.2008) Sandradewi, Jisca; Prévôt, André S. H.; Szidat, Sönke; Perron, Nolwenn; Alfarra, M. Rami; Lanz, Valentin A.; Weingartner, Ernest; Baltensperger, Urs [in: Environmental Science & Technology]
    A source apportionment study was performed for particulate matter in the small village of Roveredo, Switzerland, where more than 70% of the households use wood burning for heating purposes. A two-lane trans-Alpine highway passes through the village and contributes to the total aerosol burden in the area. The village is located in a steep Alpine valley characterized by strong and persistent temperature inversions during winter, especially from December to February. During two winter and one early spring campaigns, a seven-wavelength aethalometer, high volume (HIVOL) samplers, an Aerodyne quadrupole aerosol mass spectrometer (AMS), an optical particle counter (OPC), and a Sunset Laboratory OCEC analyzer were deployed to study the contribution of wood burning and traffic aerosols to particulate matter. A linear regression model of the carbonaceous particulate mass in the submicrometer size range CM(PM1) as a function of aerosol light absorption properties measured by the aethalometer is introduced to estimate the particulate mass from wood burning and traffic (PMwb, PMtraffic). This model was calibrated with analyses from the 14C method using HIVOL filter measurements. These results indicate that light absorption exponents of 1.1 for traffic and 1.8–1.9 for wood burning calculated from the light absorption at 470 and 950 nanometers should be used to obtain agreement of the two methods regarding the relative wood burning and traffic emission contributions to CM(PM1) and also to black carbon. The resulting PMwb and PMtraffic values explain 86% of the variance of the CM(PM1) and contribute, on average, 88 and 12% to CM(PM1), respectively. The black carbon is estimated to be 51% due to wood burning and 49% due to traffic emissions. The average organic carbon/total carbon (OC/TC) values were estimated to be 0.52 for traffic and 0.88 for wood burning particulate emissions.
    01A - Beitrag in wissenschaftlicher Zeitschrift