A problem hindering the acceptance of magnetic therapy has been that many studies have used inadequately defined treatment devices leading to difficulties reproducing experimental conditions from laboratory to laboratory [53].
There are a number of systems from single neurons and synapses [15], [16] to invertebrate [17], [18] and vertebrate animals including humans [19] [21], which even generate variable output despite no variations in input at all, leading to difficulties reproducing even tightly controlled experiments [22].
Hence they have difficulty reproducing the recent slowdown in surface warming.
Plantations in some areas have been moved to higher and cooler altitudes, 1,800 to 2,100 metres (6,000 to 7,000 feet), at which the rust fungus has difficulty reproducing, though global warming is expected to further the spread of the disease into these areas.
Considering the apparent simplicity of the technique, Martin Pera, a stem cell scientist at the University of Melbourne in Australia, finds the difficulty reproducing the result "puzzling".
Several prior studies have reported selective loss of DA neurons after systemic administration of lactacystin or PSI to rodents [10], [37], [38], but other investigators have had difficulty reproducing these results [39], [40].
Beyond these limitations, the data provide a clear example of the difficulties of reproducing a controlled study in real-world conditions, and consequently of obtaining identical outcomes; these difficulties appeared even when the study was implemented by the same research group and in a comparable health-care setting.
Quite apart from the difficulties in reproducing the temporal subtlety of Proust's "Longtemps, je me suis couché de bonne heure", neither Moncrieff's "For a long time I would go to bed early," nor Lydia Davis's "For a long time I went to bed early," really cuts it.
However, in our study as shown in Fig. 6, we find few reports stating difficulties in reproducing the bug (4% in compare to 77%).
There are doubts concerning the attainment of such suitable objectives in primary care because of the difficulties for reproducing the conditions of clinical trials.
Likewise, the WNSimRep v1 dataset is motivated by the discovery of several contradictory results and difficulties in reproducing previously reported methods and experiments.
