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  • Bergholm, Tapio (Työväen historian ja perinteen tutkimuksen seura, 1998)
    SKP:n johto ei ainakaan palkka- ja työmarkkinakysymyksissä kyennyt dynaamiseen ja suunnitelmalliseen toimintaan. SKP:n vallankumouksellisen uhon vaihtuminen vastuunkantoon keväällä 1945 tapahtui peitetysti ja asteittain. SKP:n tuki vakautuspolitiikalle vuosina 1945-1946 oli selvää, mutta tuskin SKP:n toivomaa poliittista kehitystä edistävää. Arabian lakko syksyllä 1946 ja kevään 1947 inflaatiokierrokseen liittynyt autonkuljettajien palkkaliike olivat työmarkkinakriisejä, joissa SKP:n puoluejohdon päätöksenteon puolinaisuus ja hitaus tulivat selkeästi esiin. Voi kysyä miksi uusinkin tutkimus on löytänyt SKP:n ohjaavan käden työmarkkinakehityksestä, missä puolue oli usein tapahtumien yllättämä ja joutui jälkijättöisesti muodostamaan kantansa liikkeelle lähteneisiin palkkaliikkeisiin ja lakkoihin? Ehkä tutkijat ovat etsineet ja löytäneet suurta ja mahtavaa sieltä, missä sitä ei kovin paljon ollutkaan.
  • Kauppala, Pekka (HELSINGIN SANOMAT OY, 2014)
    On virheellistä puhua "Ukrainan sisällissodasta" tai Itä-Ukrainasta konfliktialueena. Ukraina on kokonaisuudessaan stabiili ja rauhallinen ja levottomuudet rajoittuvat alueelliselta kooltaan vähäiselle Donbassin hiilikaivosalueelle. Tapahtumia siellä Ukrainan vallankumouksen aikana ja sen jälkeen on syytä nimittää "Donbassin kapinaksi" analogisesti Vendéen kapinaan Ranskan suuren vallankumouksen aikana.
  • Svynarenko, Arseniy (Venäjän ja Itä-Euroopan tutkimuksen seura, 2005)
  • Aarrevaara, Timo (ESAN KIRJAPAINO, 2014)
  • Grönqvist, Kaj (Juridiska föreningen i Finland, 2013)
    En recension av en bok om bevisförbud i rättspraxis
  • Pareyon, Gabriel (Conaculta, 2005)
  • Tolvanen,-R; Lunden,-J; Korkeala,-H; Wirtanen,-G (Des Moines, USA: International Association for Food Protection., 2007)
    Persistent Listeria monocytogenes contamination of food industry equipment is a difficult problem to solve. Ultrasonic cleaning offers new possibilities for cleaning conveyors and other equipment that are not easy to clean. Ultrasonic cleaning was tested on three conveyor belt materials: polypropylene, acetal, and stainless steel (cold-rolled, AISI 304). Cleaning efficiency was tested at two temperatures (30 and 45 degrees C) and two cleaning times (30 and 60 s) with two cleaning detergents (KOH, and NaOH combined with KOH). Conveyor belt materials were soiled with milk-based soil and L. monocytogenes strains V1, V3, and B9, and then incubated for 72 h to attach bacteria to surfaces. Ultrasonic cleaning treatments reduced L. monocytogenes counts on stainless steel 4.61 to 5.90 log units; on acetal, 3.37 to 5.55 log units; and on polypropylene, 2.31 to 4.40 log units. The logarithmic reduction differences were statistically analyzed by analysis of variance using Statistical Package for the Social Sciences software. The logarithmic reduction was significantly greater in stainless steel than in plastic materials (P<0.001 for polypropylene, P=0.023 for acetal). Higher temperatures enhanced the cleaning efficiency in tested materials. No significant difference occurred between cleaning times. The logarithmic reduction was significantly higher (P=0.013) in cleaning treatments with potassium hydroxide detergent. In this study, ultrasonic cleaning was efficient for cleaning conveyor belt materials.
  • Kohout, Tomas; Karlqvist, Ronnie; Lassila, Ilkka Johannes; Eskelinen, Joona Juhani; Hortling, Airi; Pesonen, Lauri; Haeggström, Edward (Geofysiikan seura,, 2013)
    An ultrasonic method was tested to rapidly determine the porosity in custom made ceramic samples. The samples with porosities between 4 and 33% were of identical composition. The porosity estimates by ultrasonic method were validated against those obtained by helium and air pycnometry as well as with Archimedean method. The ultrasonic measurements can be performed rapidly (less than a minute) but they require a well prepared sample.
  • Hänninen, Tuomas; Tukiainen, Pekka; Svedström, Kirsi; Serimaa, Ritva; Saranpää, Pekka; Kontturi, Eero; Hughes, Mark; Vuorinen, Tapani (WALTER DE GRUYTER GMBH & CO. KG, 2012)
  • Garcia, Francisco; Pellegrini, Giulio; Lozano, Manuel; Balbuena, Juan; Fleta, Celeste; Guardiola, Consuelo; Quirion, David (2011)
    An ultra thin silicon detector called U3DTHIN[1,2] has been designed and built to be used in detection systems for Neutral particle analyzers (NPA). The main purpose of this detector is to provide a state-of-the-art solution for NPAs at ITER experimental reactor. In the past the NPAs were using very thin scintillators read out by photomultiplier tubes[3,4], and their main drawbacks were poor energy resolution, intrinsic scintillation non-linearity, relative low count rate capability and finally poor signal-to-background separation for the low energy channels. The proposed U3DTHIN detector is based on very thin sensitive substrate which will provide nearly 100% detection efficiency for ions and at the same time very low sensitivity for the neutron and gamma radiation background. To achieve a very fast charge collection of the carriers generated by the ions a 3D electrode structure[5] has been introduced in the sensitive volume of the detector. One of the most innovative features of these detectors has been the optimal combination of the thin entrance window and the sensitive substrate thickness, to accommodate very large dynamic range primary ions energy. With an entrance window of tens of nanometers; together with a sensitive substrate thickness of less than 5 μm we used them for the low energetic channels and lest than 20 μm for the medium and high energetic ones. In order to find the optimal Signal to background ratio simulations with GEANT4 and TCAD has been performed. The first results obtained during characterization of such U3DTHIN detectors will be presented.
  • Guardiola, Consuelo; Fleta, Celeste; Pellegrini, Giulio; Garcia, Francisco; Quirion, David; Rodriguez, Joaquin; Lozano, Manuel (INSTITUTE OF PHYSICS PUBLISHING, 2012)
    We present a novel neutron detector based on an ultra-thin 3D silicon sensor with a sensitive volume only 10 µm thick. This ultra-thin active volume allows a high gamma-ray rejection, a key requirement in order to discriminate the signal coming from the neutrons in a mixed neutron-gamma ray environment. The device upper-side is covered with a novel boron-based compound that detects neutrons by means of the 10B(n,α)7Li nuclear reaction. The performance of test devices has been investigated first with a gamma-ray source to evaluate the gamma-ray rejection factor, and then with an 241AmBe neutron source to assess the neutron-gamma ray discrimination properties.
  • Salmenniemi, Suvi (Venäjän ja Itä-Euroopan tutkimuksen seura, 2003)
  • Räsänen, Pajari (Gaudeamus Helsinki University Press, 2010)
  • Seo, Seung B; Zeng, Xiangpei; King, Jonathan L; Larue, Bobby L; Assidi, Mourad; Al-Qahtani, Mohamed H; Sajantila, Antti; Budowle, Bruce (BioMed Central, 2015)
    Abstract Background Massively parallel sequencing (MPS) technologies have the capacity to sequence targeted regions or whole genomes of multiple nucleic acid samples with high coverage by sequencing millions of DNA fragments simultaneously. Compared with Sanger sequencing, MPS also can reduce labor and cost on a per nucleotide basis and indeed on a per sample basis. In this study, whole genomes of human mitochondria (mtGenome) were sequenced on the Personal Genome Machine (PGMTM) (Life Technologies, San Francisco, CA), the out data were assessed, and the results were compared with data previously generated on the MiSeqTM (Illumina, San Diego, CA). The objectives of this paper were to determine the feasibility, accuracy, and reliability of sequence data obtained from the PGM. Results 24 samples were multiplexed (in groups of six) and sequenced on the at least 10 megabase throughput 314 chip. The depth of coverage pattern was similar among all 24 samples; however the coverage across the genome varied. For strand bias, the average ratio of coverage between the forward and reverse strands at each nucleotide position indicated that two-thirds of the positions of the genome had ratios that were greater than 0.5. A few sites had more extreme strand bias. Another observation was that 156 positions had a false deletion rate greater than 0.15 in one or more individuals. There were 31-98 (SNP) mtGenome variants observed per sample for the 24 samples analyzed. The total 1237 (SNP) variants were concordant between the results from the PGM and MiSeq. The quality scores for haplogroup assignment for all 24 samples ranged between 88.8%-100%. Conclusions In this study, mtDNA sequence data generated from the PGM were analyzed and the output evaluated. Depth of coverage variation and strand bias were identified but generally were infrequent and did not impact reliability of variant calls. Multiplexing of samples was demonstrated which can improve throughput and reduce cost per sample analyzed. Overall, the results of this study, based on orthogonal concordance testing and phylogenetic scrutiny, supported that whole mtGenome sequence data with high accuracy can be obtained using the PGM platform.
  • Seo, Seung Bum; Zeng, Xiangpei; King, Jonathan L; Larue, Bobby L; Assidi, Mourad; Al-Qahtani, Mohamed H; Sajantila, Antti; Budowle, Bruce (BioMed Central Ltd, 2015)
    Abstract Background Massively parallel sequencing (MPS) technologies have the capacity to sequence targeted regions or whole genomes of multiple nucleic acid samples with high coverage by sequencing millions of DNA fragments simultaneously. Compared with Sanger sequencing, MPS also can reduce labor and cost on a per nucleotide basis and indeed on a per sample basis. In this study, whole genomes of human mitochondria (mtGenome) were sequenced on the Personal Genome Machine (PGMTM) (Life Technologies, San Francisco, CA), the out data were assessed, and the results were compared with data previously generated on the MiSeqTM (Illumina, San Diego, CA). The objectives of this paper were to determine the feasibility, accuracy, and reliability of sequence data obtained from the PGM. Results 24 samples were multiplexed (in groups of six) and sequenced on the at least 10 megabase throughput 314 chip. The depth of coverage pattern was similar among all 24 samples; however the coverage across the genome varied. For strand bias, the average ratio of coverage between the forward and reverse strands at each nucleotide position indicated that two-thirds of the positions of the genome had ratios that were greater than 0.5. A few sites had more extreme strand bias. Another observation was that 156 positions had a false deletion rate greater than 0.15 in one or more individuals. There were 31-98 (SNP) mtGenome variants observed per sample for the 24 samples analyzed. The total 1237 (SNP) variants were concordant between the results from the PGM and MiSeq. The quality scores for haplogroup assignment for all 24 samples ranged between 88.8%-100%. Conclusions In this study, mtDNA sequence data generated from the PGM were analyzed and the output evaluated. Depth of coverage variation and strand bias were identified but generally were infrequent and did not impact reliability of variant calls. Multiplexing of samples was demonstrated which can improve throughput and reduce cost per sample analyzed. Overall, the results of this study, based on orthogonal concordance testing and phylogenetic scrutiny, supported that whole mtGenome sequence data with high accuracy can be obtained using the PGM platform.
  • Lindstedt, Jouko (Rosenberg & Sellier, 1995)
  • Liskin, Olga; Schneider, Kurt; Fagerholm, Fabian; Münch, Jürgen (2014)
    User stories are a well-established way to record requirements in agile projects. They can be used as such to guide the daily work of developers or be split further into tasks, which usually represent more technical requirements. User stories and tasks guide communication and collaboration in software projects. However, there are several challenges with writing and using user stories in practice that are not well documented yet. Learning about these challenges could raise awareness for potential problems. Understanding how requirements artifacts are used for daily work could lead to better guidelines on writing stories that support daily work tasks. Moreover, user stories may not be appropriate to capture all kinds of requirements that are relevant for a project. We explore how to utilize requirements artifacts effectively, what their benefits and challenges are, and how their scope granularity affects their utility. For this, we studied a software project carried out in the Software Factory at the Department of Computer Science, University of Helsinki. We investigated the requirements artifacts and then interviewed the developers and the customer about their experiences. Story and task cards have helped the participants throughout the project. However, despite having a Kanban board and rich communication within the team, some requirements were still too implicit, which also led to misunderstandings. This and other challenges revealed by the study can guide future in-depth research.
  • Dendrinos, Spyridon; Müller, Detlef (American Mathematical Society, 2013)
    We prove sharp estimates, with respect to the ane arclength measure, for the restriction of the Fourier transform to a class of curves in R^d that includes curves of nite type. This measure possesses certain invariance and mitigation properties which are important in establishing uniform results.