What the limitation?4 answersLimitation refers to a set of rules that determine the time period within which claims must be brought, providing a defendant with a complete defense. In various contexts, different factors can act as limiting elements. For instance, in the ocean, phosphorus is considered the globally limiting nutrient, especially during the Proterozoic era. In the field of object detection algorithms, the performance of the Single-Shot Multibox Detector (SSD) is limited by factors such as uniform anchor generation and independent use of multiscale features. Budgetary constraints can also act as a limitation, affecting the reliability program budget and leading to limited or no product testing, which in turn impacts reliability predictions. Additionally, in legal contexts, the timing of decisions by competition authorities can interact with the time limits for bringing claims, adding complexity to the process.
What are the limitations of the Hubbard model?4 answersThe Hubbard model, despite its simplicity, exhibits a rich phenomenology and is of great importance in understanding strongly correlated electron systems. However, there are limitations to the model. Much of its phase diagram remains controversial, and there are important outstanding open questions regarding its ground state properties. The model has been studied using analytical methods in certain limits, but numerical tools have shown impressive progress in achieving accurate results. The model has been applied to experiments with ultracold fermionic atoms, but boundary effects can affect the results. Additionally, the model's simplicity may not capture all the complexities of real quantum materials.
What are the limitations of using x-rays for studying hydrogen bonds?4 answersX-ray studies have limitations when it comes to studying hydrogen bonds. The sensitivity of x-ray polarimeters is limited by the polarization purity, which is affected by the divergence of the source and multiple-wave diffraction inside the polarizer crystals. Protein X-ray crystallography struggles to detect individual hydrogen atoms and distinguish between carbon, nitrogen, and oxygen atoms in the electron density, making it difficult to orientate certain side chains. X-ray absorption spectroscopy has demonstrated sensitivity to hydrogen bonding, but further research is needed to fully understand the structure and dynamics of the hydrogen-bond network in water. X-ray diffraction coupled with Fourier imaging methods can reliably screen hydrogen bonds, but no evidence of proton migration or disorder was observed in the short hydrogen bond in potassium hydrogen phthalate.
What are the limitations of NIR spectroscopy?5 answersNIR spectroscopy has limitations primarily related to technical factors such as noise in detectors and the complexity and cost of light sources. These limitations have hindered the full potential of NIR spectroscopy in various applications. Additionally, the practical utilization of low-power NIR-to-visible photon upconversion systems is hampered by low efficiency. In the field of wood characterization, NIR spectroscopy faces challenges in terms of moisture content and portability, especially in forest environments. The robustness of calibrations in NIR spectroscopy also depends on sample preparation. Overall, these limitations highlight the need for advancements in technology and methods to overcome technical constraints and fully exploit the potential of NIR spectroscopy in various fields.
What are the limitations of this research?5 answersThe limitations of the research include a lack of evidence for CSR practices in development countries like Sri Lanka, which highlights the need to close this gap and understand the perspectives of CSR. Another limitation is the theoretical nature of contributions in customer engagement value (CEV), with few practical frameworks available. Additionally, claims about policy implications often lack discussion of objectives, effectiveness of interventions, and consideration of uncertainty and unintended effects. In the study on hotels and home shares, a limitation is the voluntary compliance of safety and security practices in home shares, which may require closer regulation of home-sharing companies. Lastly, the binary distinction between manufacturing and service firms in the study on organizational structure and ambidexterity may limit generalizability to pure manufacturing and service firms.
What are the limitations of electrophoresis?5 answersElectrophoresis has several limitations. One limitation is the effect of Brownian motion on the interpretation of experiments involving nanocolloids. Brownian translation can change the rate of axial separation, while Brownian rotation reduces the alignment of particles with the applied electric field. Another limitation is the limited discriminatory ability of pulsed-field gel electrophoresis (PFGE) for certain biotypes of Yersinia enterocolitica. PFGE is highly discriminatory for biotype 1A isolates but has low discriminatory ability for biotypes 2, 3, and 4, limiting its usefulness in identifying outbreaks. Gel electrophoresis also has limitations, such as species degradation and the occurrence of artifacts in the separation process. Two-dimensional denaturing gel electrophoresis is a powerful approach but can still have issues with capillary interactions and distorted separation. Additionally, the accuracy of predictions in capillary zone electrophoresis models is limited by the accuracy of data used for calculations and the consideration of only longitudinal diffusion as the source of peak dispersion.