http://hdl.handle.net/123456789/762 2026-04-09T23:46:44Z 2026-04-09T23:46:44Z Malombe, M, F. Mageto T Muthama, V. http://hdl.handle.net/123456789/856 2022-06-30T05:07:31Z 2022-04-01T00:00:00Z

An Application of Multi-label Linear Discriminant Analysis and Binary Relevance K-Nearest Neighbor in Multi-label Classification of Annotated Images Malombe, M, F.; Mageto T; Muthama, V. Although Binary Relevance (BR) is an adaptive and conceptually simple multi-label learning technique, its inability to exploit label dependencies and other inherent problems in multi-label examples makes it difficult to generalize well in the classification of real-world multi-label examples like annotated images. Thus, to strengthen the generalization ability of Binary Relevance, this study used Multi-label Linear Discriminant Analysis (MLDA) as a preprocessing technique to take care of the label dependencies, the curse of dimensionality, and label over counting inherent in multi-labeled images. After that, Binary Relevance with K Nearest Neighbor as the base learner was fitted and its classification performance was evaluated on randomly selected 1000 images with a label cardinality of 2.149 of the five most frequent categories, namely; "person", "chair", "bottle", "dining table" and "cup" in the Microsoft Common Objects in Context 2017 (MS COCO 2017) dataset. Experimental results showed that micro averages of precision, recall, and f1-score of Multi-label Linear Discriminant Analysis followed by Binary Relevance K Nearest Neighbor (MLDA-BRKNN) achieved a more than 30% improvement in classification of the 1000 annotated images in the dataset when compared with the micro averages of precision, recall, and f1- score of Binary Relevance K Nearest Neighbor (BRKNN), which was used as the reference classifier method in this study

2022-04-01T00:00:00Z Mwenda, P, M. Njoroge, W Mirenga, S Kinyua, D,M http://hdl.handle.net/123456789/854 2022-06-29T14:22:06Z 2022-04-01T00:00:00Z

Review: Advances in the CIGS Thin Films for Photovoltaic Applications Mwenda, P, M.; Njoroge, W; Mirenga, S; Kinyua, D,M The copper indium gallium selenium (CIGS) thin film is widely acknowledged as the most promising material for photovoltaic applications. Mainly due to appealing chemical and physical structures properties, low fabrication cost, high efficiency, and uncomplicated integration especially with the advance ment in the use of the flexible substrate. Promising results have been achieved in CIGS-based solar cells in the last few years and these devices could be key in unlocking the potential of green energy. Therefore, it is necessary to un derstand the parameters that are critical to improving the efficiency of these devices. Parameters such as doping concentration, thickness, substrates, and energy bandgap. In this review, we comprehensively report on these parame ters with an aim of showing the recent progress on the various methods used to optimize them, all geared towards efficient and low cost solar cells for PV applications

2022-04-01T00:00:00Z Tsimita, J Moindi, S Nzimbi, B Njori w. http://hdl.handle.net/123456789/849 2022-06-29T13:22:41Z 2022-04-01T00:00:00Z

A study of 𝑾𝟓 curvature tensor in LP-Sasakian manifold Tsimita, J; Moindi, S; Nzimbi, B; Njori w. The object of the paper is to study the geometrical properties of W5 - Curvature tensors in LP-Sasakian Manifold and prove some results.

2022-04-01T00:00:00Z Omondi J, Dr. Kiruhi T,Okeyo W,Mwikya J http://hdl.handle.net/123456789/763 2022-03-03T07:28:47Z 2022-02-01T00:00:00Z

Moderated Mediated Effect of External Environment and Strategy Implementation on Relationship between Strategic Leadership and Organisation Performance Omondi J, Dr. Kiruhi T,Okeyo W,Mwikya J : Parastatals have contributed immensely to Kenya’s social and economic development, yet they often face financial and governance challenges in spite of them accounting for a sizeable share of the national budget. This often calls for appropriate and timely parastatal execution of reforms in line with the provisions and dictates of the national strategy on parastatal reforms. This study sought to establish the moderated mediated effect of external environment and strategy implementation on relationship between strategic leadership and organisation performance: case of agricultural, livestock and fisheries (ALF) parastatals in Kenya. Taking positivist approach, the study was anchored on Full Range Leadership Theory supported by Cultural Dimension, Open System Theory and Resource-Based View theory. Cross sectional survey design using a census was adopted with a target population consisting of 45 Chief executive officers and 135 senior managers from 45 ALF parastatals in Kenya. Primary data was collected using structured questionnaire and analysis done descriptively and inferentially using correlation, multiple regressions and bootstrapping. Model results showed that there was strong significant positive correlation of R=0.7731 between all the study variables. Further study results shows that 59.8% (R2 =0.598) of variation in performance can be explained by a unit change in strategic leadership style, strategy implementation and external environment. Bootstrapping results revealed that the index for moderation mediation is significant, where lower and upper confidence interval [LLCI: 0.154, ULCI: 0.384] where the zero (0) is outside the confidence interval and thus moderation mediation is significant. There is direct association between strategic leadership style and organization performance of Agricultural, Livestock and Fisheries parastatals in Kenya which is moderated by external environment and the interaction is significant while the indirect association between strategic leadership style and strategy implementation on level of external environment, the interaction is also significant thus the direct and indirect effects are both significant. External environment will influence directly and indirectly the organizational performance of Agricultural Livestock and Fisheriesparastatals in Kenya therefore, if parastatals organizations leaders want to improve their organizational performance significantly they should engage in balanced control that involves strategic leadership style, strategy implementation and external environment. The study recommends re-evaluation of leadership and strategy implementation policies at the inspectorate of state corporations in Kenya to enhance performance of the institutions and align them with stakeholder’s demands and the global emerging trends in strategy implementation. The ALF leaders should allow departments to device viable ways of achieving strategic objectives and make sure that strategic plan is developed and implemented using a participatory approach. Finally, ALF parastatals leadership must take cognizance of external environment’s influence and adjust their operations and leadership in tandem to perform better. Keywords: Strategic Leadership, Strategy implementation, External Environment, Organizational Performance

2022-02-01T00:00:00Z